[R] Concatenate variables and quoted text for output filenames

trhermes trhermes at gmail.com
Tue Apr 29 18:04:30 CEST 2008


I am outputting some graphs from SpatStat using a for loop.  I want the png
files to include the i and j from the nested loops in their names. For
example, I want the file names to look like "i-j_plot.png".  The code is
below:

ma <- levels(marks(X))
 n <- length(ma)
  for(i in 1:n)
   for(j in 1:n)
   {
    png(filename=????)
    plot(envelope(X, Kcross, i=ma[i], j=ma[j]))
    dev.off()
   }
-- 
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