Re: [R] How to assign text string as object?

From: jim holtman <jholtman_at_gmail.com>
Date: Mon, 17 Mar 2008 07:27:12 -0500

I think one of the other solutions suggested a way of doing it if "AGE" was one of the columns and you wanted to plot against all the others. It would probably be done in this fashion:

for (i in names(df)[!(names(df) %in% "AGE")]){

    plot(df$AGE, df[[i]], main=i, type='l') }

On 3/17/08, Michal Kneifl <xkneifl_at_mendelu.cz> wrote:
> One more question Jim.
> What if the names of the columns are not a combination of a letter and an
> integer? Suppose they are just "names" of craniometric characteristics, like
> "nasal length", "orbital width" etc?
> Thanks for you reply.
>
> Michael
>
> ----- Original Message -----
> From: "jim holtman" <jholtman_at_gmail.com>
> To: "Ing. Michal Kneifl, Ph.D." <xkneifl_at_mendelu.cz>
> Cc: <r-help_at_stat.math.ethz.ch>
> Sent: Sunday, March 16, 2008 11:44 PM
> Subject: Re: [R] How to assign text string as object?
>
>
> > Take a look at 'matplot'. If you want to loop, try
> >
> > for (i in 1:16) plot(df[[paste("V", i, sep="")]] ~ df$AGE)
> >
> > On 3/16/08, Ing. Michal Kneifl, Ph.D. <xkneifl_at_mendelu.cz> wrote:
> >> I have a problem I cannot get over for a long time. Imagine I have a
> >> data frame with 17 colums. 16 of them are craniometric variables of
> >> Cervus elaphus and one contains age.
> >> The data frame has 83 rows.
> >> I want to write a loop which plots the values of each craniometric
> >> variable against the age. The names of columns are V1, V2, V3, etc...
> >> What I have done till now was writing this:
> >>
> >> layout(matrix(1:16,4,4))
> >> plot(V1~AGE)
> >> plot(V2~AGE)
> >> .
> >> .
> >> .
> >> .
> >> etc.
> >> How to assign a string in the loop so that the program understands it
> >> is an object?
> >> Thank for your help in advance.
> >>
> >> Michael
> >>
> >> ______________________________________________
> >> R-help_at_r-project.org mailing list
> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> PLEASE do read the posting guide
> >> http://www.R-project.org/posting-guide.html
> >> and provide commented, minimal, self-contained, reproducible code.
> >>
> >
> >
> > --
> > Jim Holtman
> > Cincinnati, OH
> > +1 513 646 9390
> >
> > What is the problem you are trying to solve?
>
>

-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?

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Received on Mon 17 Mar 2008 - 12:30:51 GMT

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