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3 results for “from:w_poet”

setting contrasts for a logistic regression
w_poet · Nov 13, 2009 · r-help

Hi everyone, I'm doing a logistic regression with an ordinal variable. I'd like to set the contrasts on the ordinal variable. However, when I set the contrasts, they work for ordinary linear regression (lm), but not logistic regression...

how to count occurrences of string?
w_poet · Sep 20, 2009 · r-help

Hi everyone, I have an array with a variable called comments. I wish to count the number of subjects whose post-experiment comments contain a string x and then cross tab this with other variables of interest, ex. age. Does...

table, xyplot, names, & loops
w_poet · Aug 25, 2009 · r-help

Hi R community, I'm just starting out in R and have a basic question about xyplot and tables. Suppose I had a table of data with the following names: Height, Age_group, City. I'd like to plot mean...

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