[R] question about dataframe ("sensory") in PLS package

From: <jz7_at_duke.edu>
Date: Mon 31 Jul 2006 - 12:45:30 EST


Dear all,

I am trying to my dataframe for the PLS analysis using the PLS package. However I have some trouble generating the correct dataframe. The main problem is how to use one name to represent several columns in the dataframe.

The example dataframe in PLS package is called "sensory". I cannot directly read the data file since it's a binary file. If I use
"names(sensory)" command, I will get two names: "Quality" and "Panel". But
if I use "summary(sensory)" command, I will get information of five columns for "Quality" and 6 columns for "Panel" (such as "Quality.Acidity"
"Quality.Peroxide"...). So when I use PLS regression, the function is
simply "Panel ~ Quality" (but it's actually multiple regression).

Does anyone know how to build such dataframe? Please share some experience. Really appreciate the help!

Sincerely,
Jeny



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