On Jul 7, 2011, at 11:28 AM, klimator wrote:
Dear forum members,
hope you can understand my unprofessionell English. I have never been
working with RStudio before (even not with R), so I immediately need
some
help, because I want to carry out an automated multiple stepwise
linear
regression between temperatures and different surface parameters.
Data can be found in several .xls- or .csv-files within one folder.
Files
are named "TMP_20090819_MLR_sfcparA" (data for August 19th 2009),
daywise
going on until for example "TMP_20091231_MLR_sfcparA" (data for
December
31th 2009).
Every single file contains a column "logger", "temperature",
"surface_parameter1", "surface_parameter2", "surfaceparameter3", and
so on
(all in all max. 10 surface parameters). Furthermore every data file
allways
contains 21 datasets (=rows)).
What I want R to do is to automtically open several files one after
another,
to carry out multiple stepwise linear regression on 95%-statistical
significance niveau between "temperature" and the independent
variables of
all "surface_parameter(x)", to generate a new column to be filled
with the
residua between "temperature" and model-estimation and finally to
save the
output of the regression analysis to a correspondent file name
("#.txt")
into the same folder.
Is anybody able to help me with my problem?
I'm sure there are, but it seems as though you are asking for someone
to do a free consulting project or write a tutorial just for you.
Perhaps someone will volunteer, but if they do not why don't you do
some work on your own (after reading and working on "The Introduction
to R" and the "R import/Export Manual")? The when you get stuck, ...
and after reading the Posting Guide for what level of detail is
requested, ... submit another question that shows your efforts and is
more focussed.
--
David Winsemius, MD
West Hartford, CT
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