datatable.sd()¶
Calculate the standard deviation for each column from cols
.
Parameters¶
cols
Expr
Input columns.
return
Expr
f-expression having one row, and the same names and number of columns
as in cols
. The column stypes are float32
for
float32
columns, and float64
for all the other numeric types.
except
TypeError
The exception is raised when one of the columns from cols
has a non-numeric type.