is.number
Check If A Numeric Value Is Neither Missing nor Not-a-number

### Description

Returns a logical vector, matrix or array describing the type of numeric elements present. This distinguishes between ordinary numbers including infinities and missing values (NA) and not-a-number ((NaN).

### Usage

    is.number(x)

### Arguments

x | numeric vector, matrix or array.

Value
an object similar to the input which is filled logical values. Values will be TRUE if the value is finite or infinite, i.e., is neither missing (NA) nor not-a-number (NaN).
Values will be FALSE for vectors that are not of mode "numeric".
Differences between Spotfire Enterprise Runtime for R and Open-source R
is.number is not implemented in open-source R.
See Also
is.na, link{is.finite}, Arithmetic.
Examples

    # a non-zero number divided by zero creates infinity
    # zero over zero creates a NaN
    weird.values <- c(1/0, -20.9/0, 0/0, NA)
    is.infinite(weird.values)
    is.nan(weird.values)
    is.na(weird.values)
    is.number(weird.values)

Package terrUtils version 6.1.5-18
Package Index