On Jul 8, 2010, at 3:14 PM, Addi Wei wrote:
Hopefully simple question: What is the best way to name, and treat
factor
columns for data that has lots of columns?
This is my column list:
id pID50 D.1 D.2 D.3 D.4 D.5 , etc. all the way to D.185
I was under the impression from several R examples in pls that if
you name
your columns like above, you should be able to simply call all the D
factors
with "D", instead of going in and putting a plus sign between each
column.
miceD <- plsr(pID50~D, ncomp=10,data = micetitletest)
Error in model.frame.default(formula = pID50 ~ D, data =
micetitletest) :
invalid type (closure) for variable 'D'
"D" is a function name. As are "c", "data", and "df"
VS.
miceD <- plsr(pID50 ~ D.1 + D.2 + D.3 + D.4 etc. to D.185 ,
ncomp=10, data =
micetitletest)
What am I missing above that's causing that error message in bold?
Is there
a better strategy for naming my columns in order to make R use easier?
--
David Winsemius, MD
West Hartford, CT
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