TRUE / FALSE result in R

Question

I have the following vectors:

A <- c(8.4, 9.5, 8.1)
B <- c(NA,NA,NA)

I wanted R to do the following: if column A has values less than 8.5 or column B values less than 8 for the record "TRUE", otherwise write "FALSE".

I tried the following:

C <- (A <8.5 | B <8)

I was expecting the following: TRUE, FALSE, TRUE

But the result was:

> C
# [1] TRUE   NA TRUE

Obviously, when R saw that A was at least 8.5 in the second variable, she went to B, and when there was NA, she wrote NA as the result.

Do you have any suggestions on how I can avoid this?

+3

r

mad Apr 30 15 at 20:16

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2 answers

You can use a function is.na

to first determine if B is NA

, if it is set, you can check if it is less.

C <-(A < 8.5 | (!is.na(B) & B < 8) )

+4

Reversal Apr 30 15 at 20:23

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42- · Accepted Answer · 2015-04-30T21:55:32+0000

Use isTRUE

:

 isTRUE( FALSE | NA)
[1] FALSE

It is unwise to use "C" as a variable name, since "c" and "C" are (different) R functions. But with your example:

> sapply(C, isTRUE)
[1]  TRUE FALSE  TRUE