isNumeric {limma} | R Documentation

## Test for Numeric Argument

### Description

Test whether argument is numeric or a data.frame with numeric columns.

### Usage

    isNumeric(x)

### Arguments

`x` | any object

### Details

This function is used to check the validity of arguments for numeric functions. It is an attempt to emulate the behavior of internal generic math functions.

`isNumeric` differs from `is.numeric` in that data.frames with all columns numeric are accepted as numeric.

### Value

`TRUE` or `FALSE`

### Author(s)

Gordon Smyth

### See Also

`is.numeric`, `Math`

### Examples

    isNumeric(3)
    isNumeric("a")
    x <- data.frame(a=c(1,1),b=c(0,1))
    isNumeric(x)   # TRUE
    is.numeric(x)  # FALSE

[Package limma version 2.2.0 Index]