On Jul 12, 2011, at 10:12 AM, Heiman, Thomas J. wrote:
Hi,
Hopefully I got the formatting down.. I am trying to do a lasso
regression using the lars package with the following data (the data
files is in .csv format):
V1 V2 V3 V4
V5 V6 V7 V8 V9
1 FastestTime WinPercentage PlacePercentage ShowPercentage
BreakAverage FinishAverage Time7Average Time3Average Finish
2 116.9 0.14285715 0.14285715 0.2857143 4.428571 3.2857144
117.557144 117.76667 5.0
3 116.22857 0.2857143 0.42857143 0.14285715 6.142857 2.142857
116.84286 116.8 2.0
4 116.41428 0.0 0.14285715 0.2857143 5.714286 3.7142856 117.24286
117.166664 4.0
5 115.8 0.5714286 0.0 0.2857143 2.142857 2.5714285 116.21429
116.53333 6.0
It is now clear that you failed to get your data in properly. Since
stringsAsFactors is set to TRUE by default for all of the read.*
functions, all of your columns are now factors. Perhaps you had a
blank line at the beginning of your data? The default for read.csv
(which is just a wrapper with different parameters for read.table) is
to set header =TRUE. You should learn to use str() on your data
immediately after data entry steps.
--
David.
#load Data
crs<- read.csv("file:///C:/temp/Horse//horseracing.csv<file:///C:\temp\Horse\horseracing.csv
>", na.strings=c(",", "NA", "", "?"), encoding="UTF-8")
# # define x and y
x= x<-crs[,9] #predictor variables
y= y<-crs[1:8,] #response variable
library(lars)
cv.lars(x, y, K=10, trace=TRUE, plot.it = TRUE,se = TRUE,
type="lasso")
and I get:
LASSO sequence
Error in one %*% x : requires numeric/complex matrix/vector arguments
Any idea on what I am doing wrong? Thank you!!
Sincerely,
tom
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David Winsemius, MD
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
