Displaying 20 results from an estimated 1000 matches similar to: "question about dataframe ("sensory") in PLS package"
2006 Aug 21
4
question about 'coef' method and fitted_value calculation
Dear all,
I am trying to calculate the fitted values using a ridge model
(lm.ridge(), MASS library). Since the predict() does not work for lm.ridge
object, I want to get the fitted_value from the coefficients information.
The following are the codes I use:
fit = lm.ridge(myY~myX,lambda=lamb,scales=F,coef=T)
coeff = fit$coef
However, it seems that "coeff" (or "fit$coef") is
2011 Mar 20
2
Why unique(sample) decreases the performance ?
Hi,
I' am interested in differences between sample's result when samples consist
of full elements and consist of only distinct elements. When sample consist
of full elements it take about 120 sec., but when consist of only distinct
elements it take about 4.5 or 5 times more sec. I expected that opposite of
this result, because unique(sample) has less elements than full sample. Code
as
2011 Jan 17
1
Problem about for loop
Hi everyones, my function like;
e <- rnorm(n=50, mean=0, sd=sqrt(0.5625))
x0 <- c(rep(1,50))
x1 <- rnorm(n=50,mean=2,sd=1)
x2 <- rnorm(n=50,mean=2,sd=1)
x3 <- rnorm(n=50,mean=2,sd=1)
x4 <- rnorm(n=50,mean=2,sd=1)
y <- 1+ 2*x1+4*x2+3*x3+2*x4+e
x2[1] = 10 #influential observarion
y[1] = 10 #influential observarion
data.x <- matrix(c(x0,x1,x2,x3,x4),ncol=5)
data.y
2005 Jun 06
1
Help package pls.pcr
Hello!
I need help to use the package pls.pcr in R.
I installed R in an IRIX 6.5, using the version of R 0.64.1 from
sgifreeware(I didn't get to install the newest version using make). I
need to use the package pls.pcr and when I give the command:
# R
R : Copyright 1999, The R Development Core Team
Version 0.64.1 (May 8, 1999)
R is free software and comes with ABSOLUTELY NO
2005 Nov 22
3
loadings matrices in plsr vs pcr in pls pacakage
Dear list,
I have a question concerning the above mentioned methods in the pls
package with respect to the loadings matrix produced by the call. In
some work I am doing I have found that the values produced are nearly of
the same magnitude but of opposite sign. When I use the example data
(sensory) I find this result reproduced. I am prepared to work this
through but I have a feeling that
2010 Jun 24
4
Simple qqplot question
I am a beginner in R, so please don't step on me if this is too
simple. I have two data sets datax and datay for which I created a
qqplot
qqplot(datax,datay)
but now I want a line that indicates the perfect match so that I can
see how much the plot diverts from the ideal. This ideal however is
not normal, so I think qqnorm and qqline cannot be applied.
Perhaps you can help?
Ralf
2006 Aug 19
2
question about cbind()
Dear all,
I have a question about how to get a matrix by combining a large number of
columns from a data file. Suppose I read a file which have 1000 columns
by:
test = read.table("dat.txt", header=F)
I know I could use "cbind()". It's easy to do when the number of columns
is small (i.e. cbind(test$V1, test$V2)). But how about build a matrix "X"
by combine the
2007 Mar 20
1
Symbol and Ellipsis problems
Hi Everyone,
When I have a load of functions which have various arguments passed
via the ellipsis argument it keeps on assigning them as symbol making
them unusable to the function. My current work around involves using
do.call but this is rather cumbersome.
Does anyone know why it suddenly changes the types to symbol and if
there is a way to get the actual data pointed to by the symbol? (I
2004 Sep 06
4
how to add error bar to the data in R?
Dear all,
Does anyone knwo how to add error bar to the data point in a simple
xyplot? Right now, I have a .dat file including both the data points and
their standard deviation and read it in R. I tried function arrows(). But
it didn't gave me any arrows.
Thanks for the help!
Jeny
2007 Jan 02
0
pls version 2.0-0
Version 2.0-0 of the pls package is now available on CRAN.
The pls package implements partial least squares regression (PLSR) and
principal component regression (PCR). Features of the package include
- Several plsr algorithms: orthogonal scores, kernel pls and simpls
- Flexible cross-validation
- A formula interface, with traditional methods like predict, coef,
plot and summary
- Functions
2007 Jan 02
0
pls version 2.0-0
Version 2.0-0 of the pls package is now available on CRAN.
The pls package implements partial least squares regression (PLSR) and
principal component regression (PCR). Features of the package include
- Several plsr algorithms: orthogonal scores, kernel pls and simpls
- Flexible cross-validation
- A formula interface, with traditional methods like predict, coef,
plot and summary
- Functions
2013 Nov 03
3
[LLVMdev] loop vectorizer issue
Actually what I meant in my original loop, that there is a dependency
between every two consecutive iterations. So, how the loop vectorizer says
'we can vectorize this loop'?
for(int k=20;k<50;k++)
dataY[k] = dataY[k-1];
From: Henrique Santos [mailto:henrique.nazare.santos at gmail.com]
Sent: Sunday, November 03, 2013 4:28 PM
To: Sara Elshobaky
Cc: <llvmdev at
2013 Nov 03
0
[LLVMdev] loop vectorizer issue
Hi Sarah,
the loop vectorizer runs not on the C code but on LLVM IR this c code was lowered to. Before the loop vectorizer runs many other optimization change the shape of this IR.
You can see in the LLVM IR you referenced below, a preceding LLVM IR transformation has change your loop from:
> for(int k=20;k<50;k++)
> dataY[k] = dataY[k-1];
to
> int a = d[19];
>
2013 Nov 03
2
[LLVMdev] loop vectorizer issue
Hello,
I was trying to trace the Loop vectorizer of the LLVM, I wrote a simple loop
with a clear dependency.
But found that the debug shows that 'we can vectorize this loop'
Here you are my loop with dependency:
for(int k=20;k<50;k++)
dataY[k] = dataY[k-1];
And the debug prints:
LV: Checking a loop in "main"
LV: Found a loop: for.body4
LV: Found an
2013 Nov 03
0
[LLVMdev] loop vectorizer issue
Notice that the code you provided, for globals and stack allocations, at
least,
is semantically equivalent to:
int a = d[19];
for(int k = 20; k < 50; k++)
dataY[k] = a;
Like so, the load you see missing was redundant, probably hoisted by
GVN/PRE
and replaced with "%.pre".
H.
On Sun, Nov 3, 2013 at 11:26 AM, Sara Elshobaky <sara.elshobaky at gmail.com>wrote:
>
2003 Jun 18
2
install pls.pcr package
How do you install a package from CRAN ? I want to install pls.pcr, so I have downloaded pls.pcr_0.1.1.tar.gz but when I try to install it using the install package(s) from local zip file(s) option it says :
> install.packages(choose.files('',filters=Filters[c('zip','All'),]), .libPaths()[1], CRAN = NULL)
Error in file(file, "r") : unable to open connection
2009 Mar 02
2
R-code help for filtering with for loop
Dear Sir / Madam,
I am new for R coding. Kindly help me out in sorting out the following problem.
There are 50 rows with six coloumns(you could see in the attached .txt file). I
wish to go for filtering this 50 rows for any one of the six coloumns
satisfying the value >= 64.
I need to have a final table with rows having >= 64 value in any one of the six
coloumns and the rest could be
2010 Apr 16
1
vector matching
Hello all,
I have searched the archives for a similar problem to no avail. I
could use your help.
I have a bunch of vectors organized into two matrices, x and y. These
vectors (as rows) consist of combinations of elements such that order
does not matter.
I want to create a third matrix from the first two, which is basically
all the rows in x and all the rows in y, excluding the rows that
2010 Aug 09
2
TRUE/FALSE
Here is my code
# determine the DDOA measurements
for(e in 1:numSensors)
{
for(f in 1:numSensors)
{
if((combos[e,f]==1)
{
# true distance between each sensor and the target
truedistance[e]<-sqrt((targetX-sensorX[e])^2+(targetY-sensorY[e])^2)
# add an error that has a N(0, sigma^2) distribution
truedistance[e]<-(truedistance[e]+rnorm(1,
2007 Oct 23
1
Compute R2 and Q2 in PLS with pls.pcr package
Dear list
I am using the mvr function of the package pls.pcr to compute PLS
resgression using a X matrix of gene expression variables and a Y matrix
of medical varaibles.
I would like to obtain the R2 (sum of squares captured by the model) and
Q2 (proportion of total sum of squares captured in leave-one-out cross
validation) of the model.
I am not sure if there are specific slots in the