NA erase your data trick
Hi Maybe tcn5[tcn5 == -9] <- NA if tcn5 is matrix
mat<-matrix(rnorm(100),10,10) mat[5,6:7]<- -9 mat[mat == -9]<-NA
Read some intro on data manipulation, it helps you to avoid thinking in loops Cheers Petr
On 17 May 2005 at 1:37, Anders Schwartz Corr wrote:
Oops, I just erased all my data using this gizmo that I thought would replace -9 with NA. A) Can I get my tcn5 back? B) How do I do it right next time, I learned my lesson, I'll never do it again, I promise! Anders Corr
for(i in 1:dim(tcn5)[2]){ ##for the number of columns
+ for(n in 1:dim(tcn5)[1]){ ##for the number of rows
+ tcn5[is.na(tcn5[n,i]) | tcn5[n,i] == -9] <- NA
+
+ }
+ }
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