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@rstdev

Row sample (d.f. corrected) standard deviations.

Square roots of the Pearson product moment sample variances for each row of the group, with d.f. correction.

Syntax: @rstdev(x)

x: group

Return: series

For each observation

corresponding to a row in the group of

series, compute the sample standard deviation,

where

is the mean of the

values

for the observation.

Examples

show @rstdev(g

returns a linked series of sample standard deviations in the rows of group g.

Cross-references