On 12/18/2008 12:00 PM, Ranney, Steven wrote:
All -
I have a number of rows that I am assigning length classes to via
l.class<-with(wae,
ifelse((Length>=120)&(Length<130),"125",
ifelse((Length>=130)&(Length<140),"135",
ifelse((Length>=140)&(Length<150),"145",
ifelse((Length>=150)&(Length<160),"155",
ifelse((Length>=160)&(Length<170),"165",
ifelse((Length>=170)&(Length<180),"175",
...
ifelse((Length>=700)&(Length<710),"705",
"substock")))))))))))))))))))))))))))))))))))))))))))))))))))))))))))
There are a total of 60 lines and I get a "contextstack overflow" error at line 50. From reading the archives, it looks as though this is a hard limit but can be changed rather easily. Unfortunately, I haven't found any specifics on how to change this limit. Does anyone know how I can edit this upper limit?
I wouldn't call it easy: you would edit the source to gram.c or gram.y
in src/main, changing a define, and then recompile R.
However, it's not needed for the sort of thing you're doing. Just use
cut().
Duncan Murdoch
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