Google Spreadsheets currently does not support the standard function TDIST - i.e. the Student's t-distribution. This function is critical for calculating p-values.  It seems that this is related to the fact that no integral-using functions (AFAIC...
I have this dataset for income:  Income      Number of people 0           245981 8.8         150444 30          126063 49.9        123519 70          115029 90.7        277149 109.1       355768 130         324246 150.3       353239 170.2       39600...
Is there a scientific library in JavaScript that can generate probability distributions like this library in Ruby?  http://rb-gsl.rubyforge.org/  For more details on the use cases see this related question: Generate Array of Numbers that fit to a Pro...
Is there some way to store:   A visitor's IP Address What time a visitor visited my site How many times they visited   I know there is a way to do this without PHP, just with Javascript and some text files.  How it would I do this in PHP?...
I am trying to make good use of the D3 histogram function and am struggling due to an awkward fat tail data distribution. The data_points array below pertain to country population densities across multiple years. Cities like Hong Kong with high popul...
I want to make points distribution form. I got 4 inputs type number value 0-100 and total = 100 points. So we can put 25 points in each input. I already get it work to validate inputs number min 0 max 100 and it subtracts from total changed input val...
I am trying to perform multivariable linear regression with a single dependent variable Y and two independent variables x1, x2.   This is simply an OLS regression with an additional dependent variable:  Y = b0 + b1 x1 + b2 x2  I need to also calculat...
I'm using  var crypto = require('crypto'); var uid = crypto.pseudoRandomBytes(8);   to generated 64-bit IDs.  I don't need these to be truly random, but I would like them to be uniformly distributed between 0 and ffffffffffffffff. How...
The following will output the slope, intercept and correlation coefficient R^2 for a given set of x and y values.  let linearRegression = (y,x) => {         let lr = {}         let n = y.length         let sum_x = 0         let sum_y = 0         l...
I wrote a simple piece of code to compare random array difference and found something ... that I don't quite understand.   I generate 2 arrays filled with random numbers Add up the differences between the random numbers Print out the average diff...

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