pls - No variable selection
Hi Barry, I looked at the source code for pls quickly and couldn't find where/why this message is being printed. Maybe an undocumented behavior? I would ask the package maintainer. It doesn't look like a warning - just that there was no variable selection. HTH, Stephen
On Wed, May 27, 2015 at 8:03 AM, Barry King <barry.king at qlx.com> wrote:
I am attempting to use mixOmics' pls() on a problem with 16 rows
and 27 columns. When I run pls I get the message "No variable selection."
I have included a small problem below that produces this message.
What am I doing wrong? Any help is appreciated.
#===== Begin small reproducible sample program =====
library(mixOmics)
X <- matrix(c(2766, 2610, 3306, 3630,
1492, 1419, 1369, 1158,
2450, 2379, 2400, 2055,
2751, 2883, 3492, 3570,
2652, 2691, 3225, 3285,
3993, 4722, 6147, 6720,
4032, 4350, 5430, 5763,
4530, 5190, 6910, 7580,
4077, 4410, 5460, 5857,
3450, 3432, 3969, 4020,
4989, 5301, 6807, 7425,
5340, 5790, 7590, 8390,
3162, 3477, 4365, 4650,
4380, 4695, 6018, 6510,
4587, 4200, 5040, 5289,
4017, 4725, 6090, 6570),
ncol=4)
colnames(X) <- c("v1","v2","v3","v4")
Y <- matrix(c( 3.0110,
0.0000,
0.0000,
1.4820,
1.1160,
3.3970,
2.4280,
4.0240,
2.2750,
0.9588,
3.1900,
4.1320,
2.1600,
3.0940,
1.6040,
3.1620),
ncol=1)
colnames(Y) <- c("y")
mpls <- pls(X, Y, mode="regression", ncomp=2)
mpls
#===== End small reproducible sample program, begin console output =====
Call:
pls(X = X, Y = Y, mode = "regression")
PLS with a 'regression' mode with 2 PLS components.
You entered data X of dimensions: 16 4
You entered data Y of dimensions: 16 1
No variable selection.
Available components:
--------------------
loading vectors: see object$loadings
variates: see object$variates
variable names: see object$names
#===== End console output =====
Barry King
Associate Professor of Information Technology
Butler University
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Stephen Sefick ************************************************** Auburn University Biological Sciences 331 Funchess Hall Auburn, Alabama 36849 ************************************************** sas0025 at auburn.edu http://www.auburn.edu/~sas0025 ************************************************** Let's not spend our time and resources thinking about things that are so little or so large that all they really do for us is puff us up and make us feel like gods. We are mammals, and have not exhausted the annoying little problems of being mammals. -K. Mullis "A big computer, a complex algorithm and a long time does not equal science." -Robert Gentleman [[alternative HTML version deleted]]