-----Original Message-----
From: r-help-bounces at r-project.org
[mailto:r-help-bounces at r-project.org] On Behalf Of Marcio Resende
Sent: Thursday, 26 November 2009 9:27 a.m.
To: r-help at r-project.org
Subject: [R] How to sum only a few elements in a line
Hello,
I have a matrix with the numbers 0,1 and 9 I would like to
write a function that could sum each line skiping everytime a
number 9 appears for example [0 1 0 1 1 9 1] the sum would be 4.
However I cannot replace 9 by 0 otherwise after the sum is
done I wouldn?t be able to distiguish which ones were real
zeros and which ones were nines replaced by zero just to sum.
Thank you very much
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