Hello I am using the "step" function in order to do backward selection for a linear model of more than 200 variables but it doesn't work correctly. I think, there is a problem, if the matrix has same or more columns than rows. And if the matrix has too much columns the step-function doesn't work because the function will work with all columns together and I think, this is the problem. Is there a solution or a bug fixing of this problem?
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