CODEWITHSUNDEEP
r
Monica Heddneck
Monica Heddneck

Reputation: 3125

The function all() in R

Why is it that:

> 'c' %in% c('c', 'b')
[1] TRUE

But

> all('c' %in% c('c', 'b'))
[1] TRUE

Shouldn't this be false?

According to the documentation:

Are All Values True?

Description

Given a set of logical vectors, are all of the values true?

I gave it a set of logical vectors, and NOT ALL of the values are true.r

Upvotes: 0

Views: 3573

Answers (1)

cryptomanic
cryptomanic

Reputation: 6306

CASE 1:

> 1:4 %in% 1:10
[1] TRUE TRUE TRUE TRUE

In this case logical vector is returned. Since each element of 1:4 is present in 1:10 we are getting TRUE for all elements.

CASE 2:

 > 1:11 %in% 1:10
 [1]  TRUE  TRUE  TRUE  TRUE  TRUE  TRUE  TRUE  TRUE  TRUE  TRUE
[11] FALSE

We are getting TRUE for all except 11 as 11 is not in 1:10

CASE 3:

all(1:4 %in% 1:10)
[1] TRUE

If we use all() it will return either TRUE or FALSE.It will tell whether all elements of 1:4 are present in 1:10 or not.

CASE 4:

> all(1:11 %in% 1:10)
[1] FALSE

Since 11 is not in 1:10 thats why we are getting FALSE.

Now you can solve your problem very easily. all() return TRUE if all conditions are TRUE otherwise return FALSE.

Upvotes: 3

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