[R] Beginner's query - segmentation fault

[Adaikalavan RAMASAMY]

I cannot explain the segmentation fault but try this instead (which
works for matrices) 

temp[which(temp==-999, arr.ind=T)] <- NA

Are you sure temp is matrix and not a dataframe ? Use class(temp) to
find out.

Also, if you are getting these "-999.00" because you have read files
containing them, it might just be easier to code the missing values when
reading in. Try read.table( file="lala.txt",  na.strings = "-999.00").

--
Adaikalavan Ramasamy 



-----Original Message-----
From: Laura Quinn [mailto:laura at env.leeds.ac.uk] 
Sent: Tuesday, October 07, 2003 8:04 PM
To: r-help at stat.math.ethz.ch
Subject: [R] Beginner's query - segmentation fault


I am dealing with a huge matrix in R (20 columns, 54000 rows) and have
lots of missing values within the dataset which are currently displayed
as the value "-999.00" I am trying to create a new matrix (or change the
existing one) to display these values as "NA" so that I can then perform
the necessary analysis on the columns within the matrix.

The matrix name is temp and the column names are t1 to t20 inclusive.

I have tried the following command:

temp$t1[temp$t1 == -999.00] <- NA

and it returns a segmentation fault, can someone tell me what I am doing
wrong?

Thanks
Laura

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