On 29.02.2012 13:36, zisheng xing wrote:
I have a program which is designed to read through a dbf file and carry out
certain amount of further calculation if one condition obtained from the newly
read line. The condition to determine if the calculation can be done is a
if-clasue (i.e. if(m>0). Unfortunately, when m is missing, the program crashed.
Just wonder who can help me out.
1. Please ask questions on R-help after reading its posting guide.
R-devel is for development purposes.
2. Your code results in an ERROR rather than a crash.
3. Check if m exists before you compare it to some value.
Uwe Ligges
Thanks
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