Message-ID: <22387672.post@talk.nabble.com>
Date: 2009-03-07T13:45:53Z
From: LordByron
Subject: how to omit NA without using ifelse
In-Reply-To: <22371063.post@talk.nabble.com>
Hi Manli. Try the replace() function as below:
replace(a,is.na(a),0) #where a is the name of your 50 x 50 matrix
Below is an example:
a<-matrix(c(sqrt(-2:3)), nrow=2) # produces a 2 x 3 matrix some of whose
elements are NaN (or NA)
# due to square root operator on negative integers
replace(a, is.na(a), 0)
[,1] [,2] [,3]
[1,] 0 0 1.414214
[2,] 0 1 1.732051
############################
bartjoosen wrote:
>
> ?is.na
>
>
>
> Manli Yan wrote:
>>
>> I have a 50*50 matrix,some entry are NAs,I want to replace these NA by
>> 0,so can I use some syntax to do so other than using ifelse?
>> I tried to use replace(a,NA,0),it didnt work~~(a is matrix name)
>>
>> Thanks~
>>
>> [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>
>
>
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