On 11-04-09 10:34, dirknbr wrote:
I am looping through various models with different combinations of
independent variables which are stored as columns in x
glm(y ~ ??, data=x)
How can I pass the colnames of the selected columns of x into ?? seperating
them with a +
ie I want to generate
glm(y ~ x1 + x2, data=x)
glm(y ~ x2 + x3, data=x)
glm(y ~ x1 + x2 + x4, data=x)
...
I have tried the sedit function (sedit(colnames(current),' ',' + ')) but glm
doesn't understand the output.
Hi, you could try to generate the formula as a character string
and then coerce it into a formula object, since glm expects a
formula object:
vars <- names(x)
f <- as.formula(paste(vars[1], "~", paste(vars[-1], collapse="+"),
collapse=""))
glm(f, data=x)
Of course, the pastes in the f-line need to be adjusted in each
loop.
HTH, *S*
--
Sascha Vieweg, saschav...@gmail.com
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