[S] using lm but don't want to have the intercept in the regression

[Ben Chen <ben@guzman.com>]

This may be a simple question for you.

I need to run a linear regression using lm, but I don't want to have the
intercept 
in the regression. Instead, I like to use dummy variables. when I had
both the dummy
variables and the intercept in my regression, I got singularity error.


Ben Chen
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