[R] Vector with factors inside lists/tuples

[David Winsemius]

On Jun 25, 2011, at 2:13 PM, Håvard Wahl Kongsgård wrote:

> Hi, sorry my question was not really clear
>
>  |Are you very early in efforts at learning R?
> No, have been a long term user of R, but only use R for the  
> statistical stuff.
>
> The heart of the issue is that I have list of keywords that I want to
> analyse with a machine learning algorithm (20 000 keywords with a
> response variables). It's much like "micro" array data, but in my case
> it's not "genes", but instead keywords. To get it to work in R, I
> could create a data frame with multiple vectors containing different
> factors.
> That would look like this
> V1, V2,
> "Harry", "Kline"
> "Brown", "Larry"
>
> If I am not mistaken if I used V1 and V2 with the standard GLM
> function the result would be like
>
> glm( V0 ~ "HARRY"  + "KLINE" + "Brown" + "Larry")

No. You are mistaken. Assuming that V0 is defined and has the same  
length as there are rows in that data.frame, then V1 and V2 would be  
the arguments in the formula and they would not be quoted.

?glm   # and work through the examples

>
> Or I could create a complex ordered array where keywords are
> represented 1 and 0.
> If I used that in GLM I would get the same result with glm?
>
> But is there a better approach?
>
> -Håvard

David Winsemius, MD
West Hartford, CT