[R] Matrix logical operator

[Berend Hasselman]

> On 17 Jul 2017, at 07:27, Jeremie Juste <jeremiejuste at gmail.com> wrote:
> 
> 
> Hello,
> 
> I have some trouble understanding why !b &&TRUE is TRUE. Do you have an idea?
> 
> 
>> b <- matrix(c(0,1,1,0,1,0),2)
> 
>> !b
>      [,1]  [,2]  [,3]
> [1,]  TRUE FALSE FALSE
> [2,] FALSE  TRUE  TRUE
>> !b &&TRUE
> [1] TRUE
> 

Read the help for &&. You can see it like this: ?`&&`
Try

!b[1] && TRUE

and

!b[2] && TRUE


Berend hasselman

> Best regards,
> 
> Jeremie
> 
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