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
Take a look at 'matplot'. If you want to loop, try
for (i in 1:16) plot(df[[paste("V", i, sep="")]] ~ df$AGE)
On 3/16/08, Ing. Michal Kneifl, Ph.D. <xkneifl at mendelu.cz>
wrote:> I have a problem I cannot get over for a long time. Imagine I have a
> data frame with 17 colums. 16 of them are craniometric variables of
> Cervus elaphus and one contains age.
> The data frame has 83 rows.
> I want to write a loop which plots the values of each craniometric
> variable against the age. The names of columns are V1, V2, V3, etc...
> What I have done till now was writing this:
>
> layout(matrix(1:16,4,4))
> plot(V1~AGE)
> plot(V2~AGE)
> .
> .
> .
> .
> etc.
> How to assign a string in the loop so that the program understands it
> is an object?
> Thank for your help in advance.
>
> Michael
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem you are trying to solve?
You can try this also:
sapply(DF[-match("AGE", names(DF))], plot, x=DF$AGE)
On 16/03/2008, 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.
>
--
Henrique Dallazuanna
Curitiba-Paran?-Brasil
25? 25' 40" S 49? 16' 22" O