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2007 Nov 05
1
Should numeric()/character() etc initialize with NA instead of 0 or ""?
...elves and programming errors would be far less easy to overlook. e.g. x <- numeric(n) or for( i in seq(along = x) ) { try(x[i] <- function.which.might.crash( args[i] )) } or x <- numeric(n) x[condition1] <- foo(args1) x[condition2] <- foo(args2) ... x[conditionN] <- foo(argsN) will produce x without any NAs even if function.which.might.crash() actually did crash during the loop or if there are indices for which none of conditions 1 to N were true and you cannot distinguish between zeroes which are real results and zeroes that remained unchanged since initialization of...