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meanf
weighted mean of a vector or a matrix
Syntax
m = meanf(x, fre, [orien]) m = meanf(x, fre, 'r') or m = meanf(x, fre, 1) m = meanf(x, fre, 'c') or m = meanf(x, fre, 2)
Arguments
- x
A real or complex, full or sparse matrix, or an integer matrix, or an hypermatrix.
- fre
A real or complex, full or sparse matrix, or an integer matrix, or an hypermatrix.
- orien
The orientation of the computation. Valid values are
1 or "r": result is a row, after a column-wise computation.
2 or "c": result is a column, after a row-wise computation.
"*": full undirectional computation.
- m
The mean.
Description
This function computes the mean 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.
For a vector or matrix x, m = meanf(x, fre) or
m = meanf(x, fre, "*") returns in scalar m the
mean of all the entries of x, each value counted with the
multiplicity indicated by the corresponding value of fre.
m = meanf(x, fre, 'r') (or, equivalently, m = meanf(x, fre, 1))
returns in each entry of the row vector m the mean
of each column of x.
m = meanf(x, fre, 'c') (or, equivalently, m = meanf(x, fre, 2))
returns in each entry of the column vector m the mean of
each row of x.
Examples
x=[0.2113249 0.0002211 0.6653811;0.7560439 0.3303271 0.6283918] m=meanf(x,rand(x)) m=meanf(x,[10 10 10;1 1 1],'r') m=meanf(x,[10 10 10;1 1 1],'c')
See also
Bibliography
Wonacott, T.H. & Wonacott, R.J.; Introductory Statistics, fifth edition, J.Wiley & Sons, 1990.
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