Statistics functions acting on column matrices :

`mean`computes the arithmetic means of the statistical series stored in the columns of a matrix.

Input :`mean([[3,4,2],[1,2,6]])``[2,3,4]``mean([[1,0,0],[0,1,0],[0,0,1]])``[1/3,1/3,1/3]``stddev`computes the standard deviations of the population statistical series stored in the columns of a matrix.

Input :`stddev([[3,4,2],[1,2,6]])``[1,1,2]``variance`computes the variances of the statistical series stored in the columns of a matrix.

Input :`variance([[3,4,2],[1,2,6]])``[1,1,4]``median`computes the medians of the statistical series stored in the columns of a matrix.

Input :`median([[6,0,1,3,4,2,5],[0,1,3,4,2,5,6],[1,3,4,2,5,6,0], [3,4,2,5,6,0,1],[4,2,5,6,0,1,3],[2,5,6,0,1,3,4]])``[3,3,4,4,4,3,4]``quantile`computes the deciles as specified by the second argument of the statistical series stored in the columns of a matrix.

Input :`quantile([[6,0,1,3,4,2,5],[0,1,3,4,2,5,6],[1,3,4,2,5,6,0], [3,4,2,5,6,0,1],[4,2,5,6,0,1,3],[2,5,6,0,1,3,4]],0.25)``[1,1,2,2,1,1,1]``quantile([[6,0,1,3,4,2,5],[0,1,3,4,2,5,6],[1,3,4,2,5,6,0], [3,4,2,5,6,0,1],[4,2,5,6,0,1,3],[2,5,6,0,1,3,4]],0.75)``[3,3,4,4,4,3,4]``quartiles`computes the minima, the first quartiles, the medians, the third quartiles and the maxima of the statistical series stored in the columns of a matrix.

Input :`quartiles([[6,0,1,3,4,2,5],[0,1,3,4,2,5,6],[1,3,4,2,5,6,0], [3,4,2,5,6,0,1], [4,2,5,6,0,1,3], [2,5,6,0,1,3,4]])``[[0,0,1,0,0,0,0],[1,1,2,2,1,1,1], [2,2,3,3,2,2,3],``[3,3,4,4,4,3,4],[6,5,6,6,6,6,6]]``boxwhisker`draws the whisker boxes of the statistical series stored in the columns of a matrix .

Input :`boxwhisker([[6,0,1,3,4,2,5],[0,1,3,4,2,5,6], [1,3,4,2,5,6,0],[3,4,2,5,6,0,1], [4,2,5,6,0,1,3],[2,5,6,0,1,3,4]])``the drawing of the whisker boxes of the statistical series of each column of the matrix argument`