iqr
interquartile range
Syntax
q = iqr(x) q = iqr(x, orientation)
Arguments
- x
real or complex vector or matrix
- orientation
index of the dimension along which the iqr is computed. It can be either
- a character
"*"
(default),"r"
,"c"
or"m"
. "m" is equivalent tofind(size(x)>1,1)
. - a positive integer. 1 is equivalent to "r" and 2 is equivalent to "c".
- a character
- q
real or complex scalar or vector
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)
or 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
.
Examples
x = 1:10; // Interquartile range of vector 1 to 10 // Q1 = 3 and Q3 = 8, so iqr = 5 iqr(x)
Bibliography
Wonacott, T.H.Wonacott, R.J.; Introductory Statistics, J.Wiley-Sons, 1990.
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