R equivalent to MATLAB's "stop if error"

Question

I'm attempting to debug an R program, and I'm sorely missing the stop if error capability of matlab. I've gone through the R-debug-tools.pdf (mirror) documentation, but it didn't list anything like this. Is there any way to instruct R that, when any error at all is encountered - even one I didn't anticipate and plan for with a custom trace function - it should stop execution and throw me into browser() mode?

score 19 · Accepted Answer · answered Jan 20 '12 at 15:17

19

I believe you want options(error=recover)

answered Jan 20 '12 at 15:17

Ben Bolker

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score 5 · Answer 2 · answered Jan 20 '12 at 15:08

5

R has the wonderful stopifnot() which is pretty close to what C has in assert():

Description:

If any of the expressions in ‘...’ are not ‘all’ ‘TRUE’, ‘stop’ is called, producing an error message indicating the first of the elements of ‘...’ which were not true.

That is from help(stopifnot) which also has examples, as usual.

answered Jan 20 '12 at 15:08

Dirk Eddelbuettel

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This doesn't put me in `browser()` mode, though. – eykanal Jan 20 '12 at 15:18

R equivalent to MATLAB's "stop if error"

2 Answers2

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