multiple liner regression using r. syntax for selecting certain values in columns

Question

I have a data set, I'm trying to preform a multiple liner regression on its as follows:

 subject_ID adrenlvl stimuli
1           1   2945.7       3
2           2   2074.4       1
3           3   3362.4       3
4           4   3363.9       2
5           5   2079.6       3
6           6   3373.3       1
7           7   3365.8       2
8           8   2369.7       3
9           9   2078.8       2

I know, I need to use

lm(response ~ explanatory_1 + explanatory_2 + … + explanatory_p)

But for my explanatory variables I'm confused as to how I select them when all three exist in the same column. I need to split the stimuli column into 1,2,3. is there a simple way to do this?

you want to to look at `library(reshape)` and `?reshape::dcast` It will allow you to transform from your current "long" format to "wide. — Nate, Oct 21 '16 at 11:19
As Nathan said, you need `library(reshape2)` - you can obtain it by `install.packages("reshape2")`. — jakub, Oct 21 '16 at 11:51

score 0 · Answer 1 · answered Oct 21 '16 at 12:39

0

ended up installing reshape and tidyr. ended up using tidyr, was much more initiative to use.

answered Oct 21 '16 at 12:39

101ldaniels

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multiple liner regression using r. syntax for selecting certain values in columns

1 Answers1