Population Variance

This function calculates the variance of a population using only the means, variances and number of observations of its subpopulations.This means you do not need to keep all individual observations in each subpopulation to later find out the variance of the pooled data. Platforms: Matlab

World Population Monitor is a small software utility that displays information about the global population. This application comes in handy for all users who want to animate their desktop activity by adding a new Windows gadget, or simply want to stay informed about the world's population. The... Platforms: Windows 7, Windows

>> Y = cummean(X,DIM);if X is MxN, Y is also MxN. To illustrate the functionality, lets assume X is a 1xN vector. Then, Y is a 1xN vector where the n-th entry in Y is given by mean(X(1:n)). So, Y(end) = mean(X), and Y(1) = X(1). cumvar works in the same way, and this can be done on an arbitrary... Platforms: Matlab

Calculates the Variance Ratio Test of a time series, with or without the heteroskedasticity correction. Platforms: Matlab

Computes the gini coefficient when given a set of values and population weights.Short on documentation and checks. Platforms: Matlab

Computes the variance of a linear sum of variables. Requires a vector of weights (for the linear sum), and a covariance matrix of the variables. Platforms: Matlab

Moving variance v=movingvar(x,m) x is the timeseries. m is the window length. v is the variance. Aslak Grinsted 2005 Platforms: Matlab

How much in variability of some variable is contributed by variance of each shock separately.So far is for fixed number of shocks. You can change this number in the code. Platforms: Matlab

The nondimensional form of Volterra's model for population growth in a closed system is given byk*(du/dt) = u - u^2 - u int_0^t u(x) dxThis gui allows the user to input the initial population u0, nondimensional constant k, final time Tmax and the number of mesh points M. By clicking on the... Platforms: PHP

This widget simply calcuates the population of the world. It takes into consideration death rates and birth rates. Its a fun widget to watch the population of the earth increase! Platforms: Mac

LLR_DEMOD LLR Demodulator H = LLR_DEMOD_MEX(CONSTELLATION, MAPPING, METHOD) constructs a LLR demodulator object H for a given constellation, mapping and noise variance. The vectors CONSTELLATION and MAPPING are usually generated by using MATLAB Modem Modulation Modem. and contain the complex or... Platforms: Matlab

The correlation function calculated from one realization of an ensemble is inherently flawed since the expectation operation does not come into play. Hence it is important to have an idea of the variance in the correlation function. Platforms: Matlab

The programs compute the bifurcation diagram for the cubic map and a realistic population dynamics model. The value of parameter r, when the cycle of period three appears, is indicated. As expected, for higher values of r, we observe chaotic behaviour. Both models are given in the problems?... Platforms: Matlab

Suppose that you have a signal Y (Y can be a time series, a parametric surface or a volumetric data series) corrupted by a Gaussian noise with unknown variance. It is often of interest to know more about this variance. EVAR(Y) thus returns an estimated variance of the additive noise.EVAR provides... Platforms: Matlab

Semi variance method and scaled windowed variance method for fractal time series analysis.Referernce: Evaluating scaled windowed variance methods for estimating the Hurst coefficient of time series Physica A: Statistical and Theoretical PhysicsVolume 241, Issues 3-4, 15 July 1997, Pages 606-626 Platforms: Matlab

Performs the nonparametric squared ranks test on quality of variance for two samples. Based on Conover (1981), 'Practical Nonparametric Statistics', pp. 239-248.Uses normal approximation for for m >10 (MATLAB fxn norminv or table if norminv unavailable). Uses normal approximation if ties exist.... Platforms: Matlab

Random number generated using Matlab (i.e. rand, randperm,etc) is pseudo-random and not pure-random. This script provides a seed that can be used to set the state in order to generate "near-pure" random numbers using rand, randperm etc. The script grabs the "current" world population count from a... Platforms: Matlab

These files are an adaptation of the ANOVA variance component estimators to be used in the analysis of genetic data, specifically Cockerham's 1969 Theta. Formulae were adapted from Sokal and Rohlf's 1995 Biometry, and test files from the book are given as reference. Platforms: Matlab

Levene's F test is used to test the null hypothesis that multiple population variances corresponding to multiplesamples are equal. Prior to the analysis the data are transforming to the absolute deviation of the mean. Then perform an one-way analysis of variance. Platforms: Matlab

Y = UPSIDEVARIANCE(Y) returns the upside variance for columns of variable Y.Y = UPSIDEVARIANCE(Y, m) returns the upside variance using vector m as expected value for columns of variable Y.====================================================Upside variance is defined as the average sum of squared... Platforms: Matlab