iqr - interquartile range

Calling Sequence

q=iqr(x)

q=iqr(x,'r') (or, equivalently, q=iqr(x,1))

q=iqr(x,'c') (or, equivalently, q=iqr(x,2))

Parameters

• x : real or complex vector or matrix

Description

This function computes the interquartile range IQR= upper quartile - lower quartile of a vector or a matrix x .

For a vector or a matrix x , q=iqr(x) returns in the scalar q the interquartile range of all the entries of x .

q=iqr(x,'r') (or, equivalently, q=iqr(x,1) ) is the rowwise interquartile range. It returns in each entry of the row vector q the interquartile range of each column of x .

q=iqr(x,'c') (or, equivalently, q=iqr(x,2) ) is the columnwise interquartile range. It returns in each entry of the column vector q the interquartile range of each row of x .

Author

Carlos Klimann

Bibliography

Wonacott, T.H.Wonacott, R.J.; Introductory Statistics, J.Wiley-Sons, 1990.