mat2
# [,1] [,2] [,3] [,4]
#[1,] NA NA NA 1.841481
#[2,] NA NA NA NA
#[3,] NA NA NA 1.520367
A.K.
- Original Message -
From: JiangZhengyu
To: "r-help@r-project.org"
Cc:
Sent: Wednesday, July 3, 2013 5:27 PM
Subject: [R] change cell values
On Jul 3, 2013, at 2:27 PM, JiangZhengyu wrote:
>
>
>
> Dear R experts,
>
> I have two matrices (mat1 & mat2) with the same dimension & the cells (row
> and column) are corresponding to each other.
>
> I want to change cell values to NA given values of the corresponding cells in
> mat1 an
Hi Rui,
Yes, I see. You are right. Thanks for your help.
Zhengyu
> Date: Wed, 3 Jul 2013 22:38:37 +0100
> From: ruipbarra...@sapo.pt
> To: zhyjiang2...@hotmail.com
> CC: r-help@r-project.org
> Subject: Re: [R] change cell values
>
> Hello,
>
> It's not
Hello,
It's not working because you are changing mat1 before the second
condition is evaluated, and so mat1 is full of NA values. Try the following.
tmp <- mat1 # Make a copy
tmp[mat1 < 1 & mat2 < 1] <- NA # And change that copy
mat2[mat1 < 1 & mat2 < 1] <- NA
mat1 <- tmp
rm(tmp)
Hope th
Dear R experts,
I have two matrices (mat1 & mat2) with the same dimension & the cells (row and
column) are corresponding to each other.
I want to change cell values to NA given values of the corresponding cells in
mat1 and mat2 are both <1.
E.g. both mat1[2,3] and mat2[2,3] are <1, I wil
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