matrixStats (version 0.14.2)

rowIQRs: Estimates of the interquartile range for each row (column) in a matrix

Description

Estimates of the interquartile range for each row (column) in a matrix.

Usage

rowIQRs(x, na.rm=FALSE, ...)
 colIQRs(x, na.rm=FALSE, ...)
 iqr(x, na.rm=FALSE, ...)

Arguments

x

A numeric NxK matrix.

na.rm

If TRUE, missing values are dropped first, otherwise not.

...

Additional arguments passed to rowQuantiles() (colQuantiles()).

Value

• Returns a numeric vector of length N (K).

Missing values

Contrary to IQR, which gives an error if there are missing values and na.rm=FALSE, iqr() and its corresponding row and column-specific functions return NA_real_.

See Also

See IQR. See rowSds().

Examples

set.seed(1)

x <- matrix(rnorm(50*40), nrow=50, ncol=40)
str(x)

# Row IQRs
q <- rowIQRs(x)
print(q)
q0 <- apply(x, MARGIN=1, FUN=IQR)
stopifnot(all.equal(q0, q))

# Column IQRs
q <- colIQRs(x)
print(q)
q0 <- apply(x, MARGIN=2, FUN=IQR)
stopifnot(all.equal(q0, q))