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Hmisc (version 5.1-3)

all.is.numeric: Check if All Elements in Character Vector are Numeric

Description

Tests, without issuing warnings, whether all elements of a character vector are legal numeric values, or optionally converts the vector to a numeric vector. Leading and trailing blanks in x are ignored.

Usage

all.is.numeric(x, what = c("test", "vector", "nonnum"), extras=c('.','NA'))

Value

a logical value if what="test" or a vector otherwise

Arguments

x

a character vector

what

specify what="vector" to return a numeric vector if it passes the test, or the original character vector otherwise, the default "test" to return FALSE if there are no non-missing non-extra values of x or there is at least one non-numeric value of x, or "nonnum" to return the vector of non-extra, non-NA, non-numeric values of x.

extras

a vector of character strings to count as numeric values, other than "".

Author

Frank Harrell

See Also

Examples

Run this code
all.is.numeric(c('1','1.2','3'))
all.is.numeric(c('1','1.2','3a'))
all.is.numeric(c('1','1.2','3'),'vector')
all.is.numeric(c('1','1.2','3a'),'vector')
all.is.numeric(c('1','',' .'),'vector')
all.is.numeric(c('1', '1.2', '3a'), 'nonnum')

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