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stdevf
standard deviation
Calling Sequence
s=stdevf(x,fre) s=stdevf(x,fre,'r') or s=stdevf(x,fre,1) s=stdevf(x,fre,'c') or s=stdevf(x,fre,2)
Arguments
- x
real or complex vector or matrix
- fre
real or complex vector or matrix
Description
This function computes the standard deviation of the
values of a vector or matrix x, each of them
counted with a frequency given by the corresponding
values of the integer vector or matrix fre who
has the same type of x.
For a vector or matrix x, s=stdevf(x,fre) (or
s=stdevf(x,fre,'*') returns in scalar s
the standard deviation of all the entries of x,
each value counted with the multiplicity indicated by
the corresponding value of fre.
s=stdevf(x,fre,'r') (or, equivalently,
s=stdevf(x,fre,1)) returns in each entry of the row
vector s of type 1xsize(x,'c') the standard
deviation of each column of x, each value counted
with the multiplicity indicated by the corresponding
value of fre.
s=stdevf(x,fre,'c') (or, equivalently,
s=stdevf(x,fre,2)) returns in each entry of the
column vector s of type size(x,'c')x1 the
standard deviation of each row of x, each value
counted with the multiplicity indicated by the
corresponding value of fre.
Examples
x=[0.2113249 0.0002211 0.6653811;0.7560439 0.9546254 0.6283918] fre=[1 2 3;3 4 3] m=stdevf(x,fre) m=stdevf(x,fre,'r') m=stdevf(x,fre,'c')
Bibliography
Wonacott, T.H. & Wonacott, R.J.; Introductory Statistics, fifth edition, J.Wiley & Sons, 1990.
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