Ask MetaFilter questions tagged with math
http://ask.metafilter.com/tags/math
Questions tagged with 'math' at Ask MetaFilter.Mon, 15 Dec 2014 08:11:19 -0800Mon, 15 Dec 2014 08:11:19 -0800en-ushttp://blogs.law.harvard.edu/tech/rss60Numbers to Words
http://ask.metafilter.com/273027/Numbers%2Dto%2DWords
I want a plain text file listing the English words for number 1-100 (ideally, one per line any delimiter will be fine, I can fix that). One, Two, ..., One Hundred. It's got to be somewhere on this great internet. Can AskMe find it <strong>fast</strong>?tag:ask.metafilter.com,2014:site.273027Mon, 15 Dec 2014 08:11:19 -0800WolfdogHow do I solve for a percentage of a total budget...
http://ask.metafilter.com/272786/How%2Ddo%2DI%2Dsolve%2Dfor%2Da%2Dpercentage%2Dof%2Da%2Dtotal%2Dbudget
This will be easy for someone, but math is my second language so I'm at a loss.
How do I solve for the percentage of a TOTAL budget, when one line item is unknown (and is part of the total budget)? Specifically, I have a budget with 20 line items. I know the value of all the line items, except for one, and that one unknown value has to equal 16.5% of the TOTAL budget. How do I figure this out? Without that line item to start with, I don't have the total budget - does this question make sense?<br>
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Bonus if you can tell me what formula to plug into Excel so that I never have to think about this again.<br>
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Thanks so much!tag:ask.metafilter.com,2014:site.272786Tue, 09 Dec 2014 15:46:28 -0800coollibrarianOnline resources for brushing up on basic math skills?
http://ask.metafilter.com/272764/Online%2Dresources%2Dfor%2Dbrushing%2Dup%2Don%2Dbasic%2Dmath%2Dskills
What are some good, free online resources for an adult who needs to brush up on basic math operations such as working with fractions, percentages and ratios? Other than Khan Academy. The more interactive the better.tag:ask.metafilter.com,2014:site.272764Tue, 09 Dec 2014 10:33:17 -0800iamisaidDoes it ever make sense to get a second undergrad degree?
http://ask.metafilter.com/272648/Does%2Dit%2Dever%2Dmake%2Dsense%2Dto%2Dget%2Da%2Dsecond%2Dundergrad%2Ddegree
Ages ago, I posted <a href="http://ask.metafilter.com/132373/FutureEducationMoneyxTime">this question</a>. Sadly, I'm still stuck in <a href="http://ask.metafilter.com/265001/Have-you-transitioned-successfully-out-of-pink-collar-admin-hell-How">pink collar admin hell</a> and still looking for a way out. I'm not interested in climbing the ladder to get past the admin assistant jobs - I want to get away from this world altogether. More education seems like the only option, but my terrible undergrad record means that graduate school is out. I've been shying away from community college certifications because I have no way of knowing whether I'd like or be competent in any particular field. I don't want to spend a year learning electronics technology (just for example) only to find that I'm no good at it or hate the work environment that goes with it. <br>
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However, I do know that I like math - I've taken several undergrad math courses on my own (calculus, linear algebra, differential equations) and done well. I also know that any technical career is going to require computer science skills, of which I currently have none. But I live near a university that offers a combined CS/Math BS degree, and I'm thinking of trying to get into that program to open up my options career-wise.<br>
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My fears are these: 1) it's conventional wisdom that spending money on a second undergrad degree is a waste (this has kept me from enrolling in any program for the last few years); 2) I've never picked up any computer science on my own and might not have the knack for it. Likewise, I enjoy learning math but my knowledge fades pretty quickly when I'm not using it and 3) I'm too old (33) and thus wouldn't be appealing to potential employers upon graduation.<br>
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Is it always a bad idea to start over and pay to get another undergrad degree, especially later in life? Has anyone here made a similar switch to a technical career in their mid-thirties or later?tag:ask.metafilter.com,2014:site.272648Sun, 07 Dec 2014 15:28:50 -0800missixCan you turn these variables into something like a plan?
http://ask.metafilter.com/272582/Can%2Dyou%2Dturn%2Dthese%2Dvariables%2Dinto%2Dsomething%2Dlike%2Da%2Dplan
Help me take these numbers and variables and work them into a planning/predictive equation. I would like to take a couple years off work to complete a creative project. Is there a way to predict/create a time when I can be 2 years “ahead” of my retirement goal and also have enough to live on for 2 years? Help me do the maths.<br>
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I would like to retire in about 30 years.<br>
I have S in savings/emergency fund.<br>
I have R in a Roth IRA.<br>
I have I in investments.<br>
I spend about M dollars a month. (assume this to be fixed)<br>
I earn X per year.<br>
I pay D in per month in student loans, being repaid in Income-based Repayment.<br>
I have Y in a work-loan, reduced at 20% a year (100% repaid in 5 years)<br>
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Am I missing any variables that might impact this? Any other thoughts on doing this sort of planning? I've never done it before. Thanks!tag:ask.metafilter.com,2014:site.272582Sat, 06 Dec 2014 05:01:56 -0800CalicattMath Problem
http://ask.metafilter.com/272475/Math%2DProblem
Please help with this probability related math problem. This should be simple for many people. It seems I've been out of a math class for too long. <br>
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"Two teams of rock climbers are each setting up a system of anchors on a cliff. Team A's system consists of three anchor points, where the failure of any one of the three points results in the catastrophic failure of the entire system. Team B's system consists of five anchor points, where failure of any two of the five points results in the catastrophic failture of the entire system. Assuming all anchor points have an equal chance of failing during the duration of the exercise, which team's system is safer, and by how much?"<br>
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In case you are curious, the question is related to this: <a href="http://i.dailymail.co.uk/i/pix/2013/07/05/article-0-1AABFAE5000005DC-315_634x445.jpg">link</a>tag:ask.metafilter.com,2014:site.272475Thu, 04 Dec 2014 04:26:32 -0800BeaverTerrorSeeking advice about teaching maths
http://ask.metafilter.com/272150/Seeking%2Dadvice%2Dabout%2Dteaching%2Dmaths
I'm interested in teaching high school students mathematics through a tutoring agency. I have the required experience in mathematics, but very little in teaching. This doesn't seem to be a massive problem for many tutoring agencies, but I want to know: do you have any specific tips/advice about teaching mathematics? And more broadly, any advice about applying for and going to work for a tutoring agency? I'm a big fan of maths, and very interested in teaching it. I don't simply like it because 'there's only one right answer' etc, I like it for a frajillion reasons: the beauty of elegant proofs, the fun of problem solving, and the fact that it underlies the functioning of the universe as we know it. Heck, I do maths in my spare time. I make lame maths jokes. I am ready to accept that I am a fully-fledged maths nerd.<br>
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I understand that enjoying maths is not the same as being capable to teach it. I have gone through much of the high school maths syllabus (I am in Australia) and understand how to teach it from first principles.<br>
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Anything you can give me that would help me more ably engagingly teach mathematics to potential future students would be much appreciated.tag:ask.metafilter.com,2014:site.272150Wed, 26 Nov 2014 20:56:38 -0800QuilfordHelp me understand the concept of "85th Percentile."
http://ask.metafilter.com/272125/Help%2Dme%2Dunderstand%2Dthe%2Dconcept%2Dof%2D85th%2DPercentile
I am part of a group working on a policy document for the mitigation of traffic issues (e.g. speeding). Stakeholders are having a hard time with a particular criteria which reads as follows: "85th percentile speed is in excess of the signed speed limit by 5 mph or more." The engineers who wrote and will enforce the policy cannot explain to stakeholders how and why this <em>doesn't</em> mean "85% of drivers are speeding," and neither can I! So what does it mean? Of the total drivers on a segment of roadway in a given day, how many are speeding in this condition?<br>
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I know this is a traffic engineering standard, and of course I was able to google lots of very technical explanations about what percentiles mean, even in the context of traffic engineering, but they mean nothing to me or the neighborhood folks that I work with and represent for my job. Can you explain this concept to me the way you would explain it to someone with say a 6th-grade concept of math and/or statistics?tag:ask.metafilter.com,2014:site.272125Wed, 26 Nov 2014 10:51:06 -0800M.C. Lo-Carb!Getting my hands on a Russian math book?
http://ask.metafilter.com/271745/Getting%2Dmy%2Dhands%2Don%2Da%2DRussian%2Dmath%2Dbook
I'm trying to buy a copy of a famous Russian geometry textbook, Kiselev's Geometry (<a href="http://www.sumizdat.org/geom1.html">link to a recent English translation</a>), <em>in the original Russian</em>. Any copy of any edition will do; in fact, a used copy would be mildly preferred. However, I speak no Russian whatsoever, so I'm having difficulty figuring out how to go about this, partly because I don't even know what to search for on a Russian-language site! How can I complete my task? I am, of course, aware of the PDF linked off the page above, as well as another (presumably legal?) electronic copy <a href="http://www.math.ru/history/people/kiselev">here</a>. But I'd like to get my hands on a hardcopy -- it's slated to be a gift.tag:ask.metafilter.com,2014:site.271745Tue, 18 Nov 2014 19:54:30 -0800sappidusBack to math school
http://ask.metafilter.com/271449/Back%2Dto%2Dmath%2Dschool
What advice do you have for helping me go back to school in a few years? I will be retiring from the IT industry in a 2 or 3 years and would like to go back to school in what I started in: math. I graduated in 1990 with an applied math degree and then then went to graduate school in math for another year and a half before switching to computer science. Obtained a masters in comp sci in 1993 and have been working full time since then. I did take a few more graduate level math classes over the years but the last one was in 2001.<br>
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I would like to pursue a PhD after I retire but the truth is I barely remember any of what I learned back then, and I rarely have occasion to use any math in the IT world, sadly. <br>
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Do I start over from scratch with Math 101? Is a degree worth anything after so many years? I want to do this but dread the thought of taking all the other unrelated classes..English, History,... or do I even have to?tag:ask.metafilter.com,2014:site.271449Thu, 13 Nov 2014 06:41:49 -0800dukes909How to build a certain kind of blog
http://ask.metafilter.com/271440/How%2Dto%2Dbuild%2Da%2Dcertain%2Dkind%2Dof%2Dblog
I want to create a blog for my students to explore math content. I want to populate it with activities for learning math topics, mostly things I've created with <a href="http://www.geogebra.org/">Geogebra</a> (which uses javascript).<br>
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Ideally, this would be an environment where students would be prompted to answer a question (use of text-box input) and receive text feedback, then given a graph/picture to manipulate (created by me, in Geogebra). I could also ask multiple choice questions and give feedback. Also, I could somehow "randomize" the question being asked/graph displayed.<br>
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Can I build this kind of thing for free? Where do I go to start putting this thing together?<br>
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Difficulty Level: I know math, but very little programming. I'm not afraid to learn the programming required, provided it's not light years away from my Q-Basic understanding of coding.<br>
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How would you build this? Have you done this before? Where would you send an eager would be math blogger?tag:ask.metafilter.com,2014:site.271440Wed, 12 Nov 2014 18:23:22 -0800klausmanBlue's Clueless
http://ask.metafilter.com/271206/Blues%2DClueless
In light of <a href="http://www.metafilter.com/144271/The-profit-motive-in-US-education-reform">this post</a>, are there any programs or initiatives to offer an open, online, mainstream K-12 curriculum available to all students and school districts? I know there exist higher-ed options such as Khan Academy and MIT lectures, as well as a plethora of youtube channels for the autodidacts, but I was wondering if there's anything available for more general-ed, K-12 courses, and in the form of a Duolingo-like presentation.<br>
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Thanks!tag:ask.metafilter.com,2014:site.271206Fri, 07 Nov 2014 15:19:23 -0800Christ, what an assholeBalanced team schedules based on seeding
http://ask.metafilter.com/271021/Balanced%2Dteam%2Dschedules%2Dbased%2Don%2Dseeding
I'm running a fantasy football league in which we have 10 teams. The first 9 weeks were round-robin style, with each team playing each other team exactly once. My plan was to schedule weeks 10 through 13 (four weeks) such that each team played a mix of stronger and weaker opponents based on the standings in weeks 1 through 9, then use the week 1-13 results to seed teams for the playoffs in weeks 14-16, but I'm having trouble developing an approach for generating these balanced week 10-13 matchups fairly. Any ideas? I'm a proficient programmer in Python and several other languages, and I've cooked up scripts in the past to generate schedules, but those always assumed that every team would play every other team exactly once or twice, and didn't take team seeds into account, so I'm having trouble coming up with a rough algorithm for doing this when the number of weeks is constrained, and when there's a need to make sure each team's strength of schedule is balanced.<br>
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I don't need the absolute optimal solution -- anything that ensures that each team is playing each week and has a relatively fair mix of strong and weak opponents is fine. My first idea was to divide the teams into two pools, but then each pool has an odd number of players, so each week would have to have a matchup that crosses over between pools, which confounded things.<br>
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I haven't found any ready-made schedule generating sites that handle these kind of constraints, so I thought I'd ask here.tag:ask.metafilter.com,2014:site.271021Tue, 04 Nov 2014 10:01:45 -0800tonycpsuSwag for Mathletes?
http://ask.metafilter.com/271014/Swag%2Dfor%2DMathletes
I'm coaching a team of 3rd graders for the Math Olympiad. They're a bit young to compete, so it's all about fun this year. Every week they get a packet that is, essentially, extra homework. I want to find some small rewards to give them for finishing the packet. So far I've picked up some <a href="http://www.amazon.com/exec/obidos/ASIN/B00GVBVQ9G/metafilter-20/ref=nosim/">small</a> novelty <a href="http://www.amazon.com/exec/obidos/ASIN/B0079DORK0/metafilter-20/ref=nosim/">erasers</a>. Any other suggestions? Math-themed loot would be especially good.<br>
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The dollar bins at Target are kinda boring and also kinda expensive. Archie McPhee is cool but not much of it is appropriate for eight-year-olds of a variety of backgrounds, and it also gets expensive fast. I didn't find anything on Think Geek that would work. The toys in dollar stores tend to be so poorly made they're just depressing. I don't want to give them candy.<br>
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There are six kids and I'm paying for the swag and their snacks myself every week until the spring, so I'd like to keep costs as low as possible.tag:ask.metafilter.com,2014:site.271014Tue, 04 Nov 2014 08:47:14 -0800The corpse in the libraryWhich data structures changed the world?
http://ask.metafilter.com/270882/Which%2Ddata%2Dstructures%2Dchanged%2Dthe%2Dworld
In my last question, I asked for <a href="http://ask.metafilter.com/266586/Which-algorithms-changed-the-world">algorithms that changed the world</a>. Now I'd like to know, <b>what are the data structures that changed the world</b>? I've always felt that how your input data is organized informs algorithm design, and so I want to know about the history of data structures as they emerged.<br>
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I'm not necessarily looking for 'structures every computer programmer should know' or the stuff we should teach in CS 101. A structure's impact on the world (and on the field) should be the primary criteria, rather than practitioner familiarity, or pedagogical use.tag:ask.metafilter.com,2014:site.270882Sat, 01 Nov 2014 16:30:32 -0800pwnguinBest cargo cult symbolic equation editor?
http://ask.metafilter.com/270171/Best%2Dcargo%2Dcult%2Dsymbolic%2Dequation%2Deditor
You're an armchair scientist and you like reading scientific papers. A lot of the fun ones include a lot of equations. You'd like to be able to recreate those equations in a virtual blackboard. You'd select terms and be able to replace them with a library of previous equations you've made. The blackboard would enforce whatever symbolic manipulation rules are required to maintain consistency (because you sure won't be able to). If you replace a term with a number or a data input, it does the calculations necessary to display properly. What is it? The best tool for this will be able to do literally everything visually with the symbols, i.e., no text-based programming language required to use the features described here.tag:ask.metafilter.com,2014:site.270171Sat, 18 Oct 2014 07:08:30 -0800bigbigdogMath, sweet sweet math
http://ask.metafilter.com/270088/Math%2Dsweet%2Dsweet%2Dmath
I have a set of data: D(t). 5000 samples. Scatter-graphing makes some patterns clear (D-mean increases with t, for instance). D and t are always positive. I want to characterize these, statistically. I've tried blindly trying to stumble upon a distribution model that fits D to t, but that worked about as well as you'd expect.<br>
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So, how do I go about testing if P(D, t) is a function of t, t^2, log(t), t^x, etc... ? That is, given an interval of [D1:D2], what is the probability distribution for t? (And vice versa.)tag:ask.metafilter.com,2014:site.270088Thu, 16 Oct 2014 13:03:27 -0800IAmBroomVicarious Math Pressure
http://ask.metafilter.com/269824/Vicarious%2DMath%2DPressure
My eldest child is starting high school. She is in the most advanced math class (a version of geometry) offered by her fairly demanding high school. But my eldest is struggling during the review of algebra -- rate problems, word problems, etc. Concerned because math is cumulative, and I don't want her falling behind. What can I do to help, both with math and with preventing her from becoming discouraged? My daughter is very intelligent. She tested into her advanced math class, and she has never received grades that were anything less than As. Now she's struggling a bit, though, and I would like to help her turn it around. I plan to have her speak to her teacher for his suggestions on how to improve her understanding and performance. If that fails, then I might try to find her a tutor, too, but it would be great to get the hive's thoughts on resources, books, programs, plans, or even just advice about how to help a 14 year-old girl through math that is more challenging than she has faced before. <br>
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Advice I may be considering internally but that I don't really need here: take her out of the advanced math; don't worry about math because it's not that important. Advice that would be wonderful: when I was a 14 year-old (or when I was parenting my 14 year-old) there was a similar problem that I solved by doing X, Y, and Z. Thanks so much.tag:ask.metafilter.com,2014:site.269824Fri, 10 Oct 2014 23:41:43 -0800Slap FactoryEssay question has too many permutations or am I overthinking this?
http://ask.metafilter.com/269674/Essay%2Dquestion%2Dhas%2Dtoo%2Dmany%2Dpermutations%2Dor%2Dam%2DI%2Doverthinking%2Dthis
For my son’s high school history class, he has been assigned an in-class argument/opinion essay. The teacher ended most of the lecturing this week and has given them time to prepare thesis statements for the essays. Here is where it starts to get complicated (at least to my son and me): What I want to know: <br>
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* What are the useful variable permutations of questions numbers 2 & 3 as explained below?<br>
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* Does this essay assignment seem a bit unreasonable?<br>
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There will be three possible questions for the essay. The students have been given all three to prepare. The teacher will pick one of these at random on the day of the essay:<br>
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1. Describe the extent and impact of new trading systems as they develop during this time period. <br>
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2. How do belief systems (Buddhism, Confucianism, Dao, Legalism, Christianity, Zoroastrianism) compare and what is the impact they had on their respective societies? <br>
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3. In the following areas explain the political development: Han China, South Asia, Greece, Rome, Persia and Mesoamerica. <br>
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The instructions are:<br>
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* 10 factual items of historical significance on the topic<br>
* At least 3 specific analytical statements (commentary) addressing the thesis, to prove their opinion<br>
* If question 2 or 3 is chosen on the day of the essay, the teacher will then pick at random two of the categories for that question. So for example, on the day of the essay the question may be “How do Christianity and Confucianism compare…” or “In Han China and Greece explain the political development”. Of course, it could be any two out of the list for each question.<br>
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My son’s is finding it difficult to prepare for the last two, as the variables are unknown until the day of the essay. In preparation, he is trying to formulate multiple thesis statements for each possible variable combination and come up with ten factual items that meaningfully correlate to those combined variables, as well as come up with three meaningful statements that support his thesis for each variable set. And then all of this needs to make a compelling argument.<br>
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I agree with him that it seems like a very difficult essay to prepare for. In his exasperation, he said it would take a mathematician to calculate are the variable combinations of (2x) variables + (10x) facts + (3x) commentary statements. I sat down and tried to figure it out, but I don’t math enough, so I think my formula of [n!/(n-r)! ] was wrong.<br>
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Again, my two questions:<br>
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What are the useful variable permutations of questions numbers 2 & 3 as explained below?<br>
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Does this essay assignment seem a bit unreasonable?tag:ask.metafilter.com,2014:site.269674Wed, 08 Oct 2014 09:27:48 -0800bionic.junkieIn a 2048 or Threes-like game, what is the highest possible score?
http://ask.metafilter.com/269599/In%2Da%2D2048%2Dor%2DThrees%2Dlike%2Dgame%2Dwhat%2Dis%2Dthe%2Dhighest%2Dpossible%2Dscore
In one of these puzzle games like 2048 or Threes, where you merge tiles to create higher numbers, is there any way to prove what is the highest possible tile number that can be created given the rules and dimensions? For example, if the 2048 game was played in a 3x3 space instead of a 4x4 space, would it still be possible to create 2048 in that space? If it was played in a 5x5 space, how much higher could we theoretically go? 8192? 32768?<br>
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Is there a way to figure out upper and lower bounds on different playfields?tag:ask.metafilter.com,2014:site.269599Mon, 06 Oct 2014 20:00:35 -0800RobotHeroCheat like a fox.
http://ask.metafilter.com/269339/Cheat%2Dlike%2Da%2Dfox
I have always been really bad at really simple games, like the ones where there are generally sound mathematical strategies for playing the optimal game. I'd like to compile a little mental rolodex of simple games and their solutions so I can feel smugly superior to any small children who seek to challenge me. For instance, tic tac toe has an optimal gameplay strategy.<br>
I imagine there's a smarter way to play battleship than to just guess at spaces.<br>
And probably the dots game (the one where you make the squares) has some strategy, too.<br>
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What are other games like this? What are their solutions?<br>
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I'd also be interested in hearing about mods to other games that make them more strategic and interesting. (Like for instance, I like to trade resource futures when I play Settlers. It opens the game up to gambling and risk.)<br>
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Really interested to see what you guys come up with!tag:ask.metafilter.com,2014:site.269339Wed, 01 Oct 2014 11:26:41 -0800phunniemeeApps for young readers
http://ask.metafilter.com/269075/Apps%2Dfor%2Dyoung%2Dreaders
What are your favorite iPad apps for 4 - 7 year olds? My almost-four-year-old son is an early reader. He can pick up adult books and read sentences out of them. It's hard for me to keep him from being bored. He loves his iPad mini, but tends to be most interested in games about characters and is easily swayed by in-game advertising. I'm not into either of those things. <br>
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I'd like to find some age-appropriate, awesome apps that will help him improve his reading and math skills, or teach him about science/the world, which he is very interested in. <br>
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I'm happy to pay for apps in exchange for no ads. (I'm tired of saying, "No, we are not buying extra widgets for twenty dollars!") <br>
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I'm looking for well-designed, educational apps like Leo's Pad, or actual books that have been app-ified. Googling gives me endless lists and no real sense of quality. Please tell me about your favorite iPad apps for 4 - 7 year olds.tag:ask.metafilter.com,2014:site.269075Fri, 26 Sep 2014 07:54:14 -0800woodvineGrammar/style for mathematicians?
http://ask.metafilter.com/268686/Grammar%2Dstyle%2Dfor%2Dmathematicians
I'm interested in learning about the details of English grammar and usage, and also maybe in picking up some prescriptions or guidelines for writing well-styled/balanced prose (a la Strunk & White, though my understanding is that there's potentially a great many schools of thought to look at here). The kicker: my academic background is in math and computer science, including the very formal reaches of things like logic, formal languages, etc. Is there any way that this stuff can help me learn that stuff? In particular, is there any especially elegant/systematic/diagrammatic/intuitive way to learn about English grammar and style past what got drilled and memorized at the elementary school level? Book recommendations especially welcome.tag:ask.metafilter.com,2014:site.268686Thu, 18 Sep 2014 14:36:49 -0800karoHelp me be a better tutor!
http://ask.metafilter.com/268521/Help%2Dme%2Dbe%2Da%2Dbetter%2Dtutor
I'm helping elementary school kids with their math and English homework. I really need math resources and strategies for helping kids with their reading/writing homework. Some are English language learners. 1) I worked with a second grader, a fourth grader, and two fifth graders last week. The kids I worked with were doing subtraction (second grade), and basic algebra (fifth grade). I want to be a helpful tutor. What math topics and resources would be the most useful for me to review?<br>
2) What are some strategies I can use when I'm going through critical reading or writing assignments with kids who struggle with reading and/or English vocabulary?<br>
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If you have any other suggestions (they don't have to be related to those two), I'm all ears. The organization I'm tutoring with gave out a handbook with tips (a.k.a. "Use the Socratic method! Check for understanding! Don't just give them the answer!"), and I'm looking to get beyond that. I'm the least experienced tutor, and it shows.<br>
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Thanks!tag:ask.metafilter.com,2014:site.268521Mon, 15 Sep 2014 13:26:35 -0800topoisomeraseHelp me model some curves that have a certain time profile.
http://ask.metafilter.com/268176/Help%2Dme%2Dmodel%2Dsome%2Dcurves%2Dthat%2Dhave%2Da%2Dcertain%2Dtime%2Dprofile
I've got a bunch of curves that (I hope) show some common profile over time, although they maybe scaled versions of each other: at any index along in the curve >1, the next point is conditional on all (or some) of the previous.
See <a href="http://i60.tinypic.com/2yklu21.png">this greatly simplified example</a>. The units on the X axis are just time increments after the first observation, like n+1,n+2. So we can't use the X axis values to train. That is, the first point in the curve could come at X=1 or X=100. But its units are consistent between curves. Anyway, each curve is just a 1-d list of single real numbers.<br>
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Anyway, I need to train some model by feeding it these training curves and telling it which point is "Go!". Then I want to feed in new, unseen lines, one value at a time, and have the model say "Ready?" when "Go!" is <em>going to be the next point</em>.<br>
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It sounds like <a href="http://en.wikipedia.org/wiki/Posterior_predictive_distribution">Posterior predictive distribution</a> does something like this, but I don't have time to research it now. I have 24 hours. Really I need a library (like Sci kit learn) to just fit to the training values, take some test values and say if "Go!" will be next or not. Can someone advise on what I need?tag:ask.metafilter.com,2014:site.268176Tue, 09 Sep 2014 07:39:17 -0800ed\26h