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do calculations as defined by a string / expand mathematical statements in R

William Dunlap 
Avoid parsing strings to make expressions.  It is easy
to do, but hard to do safely and readably.

In your case you could make a short loop out of it
   result <- x[,,,1]
   for(i in seq_len(dim(x)[4])[-1]) {
      result <- result + x[,,,i]
   }
   result <- result / dim(x)[4] 

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com

Thread (9 messages)

Martin Batholdy do calculations as defined by a string / expand mathematical statements in R Oct 5 William Dunlap do calculations as defined by a string / expand mathematical statements in R Oct 5 R. Michael Weylandt do calculations as defined by a string / expand mathematical statements in R Oct 5 Jean-Christophe BOUËTTÉ do calculations as defined by a string / expand mathematical statements in R Oct 5 R. Michael Weylandt do calculations as defined by a string / expand mathematical statements in R Oct 5 R. Michael Weylandt do calculations as defined by a string / expand mathematical statements in R Oct 5 Martin Batholdy do calculations as defined by a string / expand mathematical statements in R Oct 5 R. Michael Weylandt do calculations as defined by a string / expand mathematical statements in R Oct 5 Daniel Nordlund do calculations as defined by a string / expandmathematical statements in R Oct 5