First of all I would advice you to use meaningful subjects when posting
to the list.
My second point is only a vague guess, but if you use the exact code
that you posted there may be bracket missing....(its the closing bracket
of the jpg() call ). May this produce your error?
Third, you should use [[]] instead of $ to access the elements of the
data frame ( see ?$ ). blith[[item]] should do the job.
HTH
Jannis
On 02/14/2011 07:33 AM, Smith, Taylor Taran wrote:
Hey,
I am trying to graph a series of XY plots from a set of .csv files. Getting the
csv files read in and the original plot set up is not a problem, but I cannot
figure out a way to call get(iterator) within a separate dataset. A chunk of my
code is below.
data<- read.csv(file= filename)
data2<- read.csv(file= filename2)
names<- names(data)
attach(data)
for (item in names) {
jpeg(filename=sprintf(directory_%s.jpg, item)
plot(SiO2, get(item), pch="", ylab=sprintf("%s", item))
points(alith$SiO2, alith$get(item), pch=21, col="red")
points(blith$SiO2, blith$get(item), pch=21, col="blue")
points(clith$SiO2, clith$get(item), pch=21, col="green")
points(dlith$SiO2, dlith$get(item), pch=21, col="orange")
points(glith$SiO2, glith$get(item), pch=21, col="red4")
points(hlith$SiO2, hlith$get(item), pch=21, col="purple")
points(llith$SiO2, llith$get(item), pch=21)
dev.off()
}
Ideally this would spit out hundreds of xy plots (and it does work if I plot them all in
the same color by turning the pch="" off. However, when calling from a dataset
with $, it will not let you use a function as the argument (the get(item) part gives an
error). Is there any way around this?
Thanks
Taylor
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and provide commented, minimal, self-contained, reproducible code.
