Re: [R] catch error/warning message in a loop

[Spencer Graves]

	  ?warnings asserts, " `warnings' prints the top-level variable 
'last.warning' in a pleasing form."

	  Have you tried something like "cat(i, last.warning)"?

hth.  spencer graves

array chip wrote:
cat can only catch the error message promptly, but
seems not able to catch the warning message promptly.
Can anyone point out how i can catch the warning
message in a loop?
--- Spencer Graves <[EMAIL PROTECTED]> wrote:

	  With situations like this, I often include
something like "cat(i, 
'')" in the loop (where "i" is the index of the
loop).

	  If I'm writing a function to be used by others, I
might use "try", as 
described, e.g. in Venables and Ripley (2000) S
Programming (p. 48).

hth.  spencer graves

array chip wrote:

Hi, I am running cox regreesion (coxph) on a large
number of independent variables, one variable at a
time, using loop. At some point of the loop, the
cox

regression stopped due to some errors. How can I
know

at which variable the cox regression stopped so
that I

can pinpoint the variable that causes the problem?
I

guess this is not unique to cox regression, it is
the

problem of catching the error/warning message
promptly

in a loop.

tahnks

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