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stevenworthington/formula_creation.R

Created April 4, 2012 15:36
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concatenate variables into a formula
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formula_creation.R
# example of how to concatenate lots of variables into a formula without typing them out
# example from the High School and Beyond data set
hsb_df <- read.table("http://www.ats.ucla.edu/stat/R/notes/hs0.csv", header = TRUE, sep = ",")
# create the formula using variables from columns 4:8 and 10:11 as predictors
hsb_form <- formula( paste(c("math ~ 1", colnames(hsb_df[, c(4:8, 10:11)])), collapse = " + ") )
# fit the model
fit1 <- lm(hsb_form, data = hsb_df)
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