COLSTDEV

Purpose:

Produces a row of the standard deviations of each column in the input table.

Syntax:

COLSTDEV(a)

a

-

A series or table.

Returns:

A one-row table with the same number of columns as the input table.

Example:

colstdev(ravel({1,2,3},{2,3,4}))

 

returns {{1, 1}}

Remarks:

COLSTDEV computes the sample standard deviation for each column of a series where the sample standard deviation is defined as:

 

 

image\std01.gif

 

where the arithmetic mean is defined as:

 

image\std02.gif

See Also:

COL

COLLENGTH

COLMAX

COLMEAN

COLMEDIAN

COLMIN

COLRMS

ROWSTDEV

STDEV

TRANSPOSE