avr (alias: avg)

The arithmetic mean function is implemented in two versions.

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Usage 1

avr(x)

x

a scalar, vector or matrix

Result 1

The result is the arithmetic mean of all elements of x

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Usage 2

avr(x, flag)

x

a matrix

flag

compute mean of the column vectors (flag=0) or the row vectors (flag≠0) is requsted; flag must be a scalar

Result 2

• if flag=0: the result r is the vector of the column means

r[i] = eval avr( x[*,i], 0) // i = 0 .. ncol(x)-1

• otherwise: the result r is the vector of the row means

r[i] = eval avr( x[i,*], 1) // i = 0 .. nrow(x)-1

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See also

median, var, dev, corr, sum, hist,

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