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# Liber Eleutherios

21 total contributions since 2013

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Submitted

Fast or Accurate Moving Average (mex functions)
Return the moving average of 2D matrix X, given a running window w

Submitted

Inequality Package
Inequality Metrics: Gini Coefficient associated to the Lorenz Curve, Theil and Atkinson indexes

Submitted

Weighted Covariance Matrix
Calculates a Weighted Covariance Matrix

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Weighted Correlation Matrix
Compute coefficients of the Weighted Correlation Matrix, as an alternative to CORRCOEFF

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Weighted Kendall Rank Correlation Matrix
Fast Weighted Kendall Rank Correlation Matrix (much much faster than Matlab CORR)

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SUB2IND4UP Linear index from subscripts of upper triangular matrix (only elements above diagonal)
Single index for given subscripts of a 2D upper matrix, (no elements over the diagonal)

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IND2SUB4UP Subscripts from linear index for upper triangular matrix (only elements above diagonal)
Subscripts from a given single index for a 2D upper matrix (no elements over the diagonal)

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Downside correlation
This function returns the downside correlation for the columns of variable Y

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Upside correlation
This function returns the upside correlation for the columns of variable Y

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Upside covariance
This function returns the upside covariance for the columns of variable Y

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Downside covariance
This function returns the downside covariance for the columns of variable Y

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Upside variance
This function returns the upside variance for the columns of variable Y

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Downside variance
This function returns the downside variance for the columns of variable Y

Submitted

Correlation Percentiles
CORRPERC estimates percentiles & standard deviations of a correlation matrix, performing a bootstrap

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Download the entire archive of mp3 and zip files from Project Gutenberg

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Fast Correlation between two vectors
fastcorrelation is a fast and numerically stable algorithm for computing the correlation (in C)

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Analytical solution for Orthogonal Linear Least Squares in two dimensions
The function returns the Orthogonal Linear Least Squares estimate for parameters of line ax+by+c=0

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Rudimental compression algorithms for 2D matlab plots
Rudimental compression algorithms for 2D matlab plots (make eps images small for your LaTeX docs!)

Submitted

Rankings
Calculate Rankings with five different methodologies

Question

Sum elements of a vector based on given indices
I have two large vectors, values and indices. I need to sum the elements of values using indices as in this brute force example:...

7 years ago | 1 answer | 0