Displaying 20 results from an estimated 1089 matches for "mat".

Did you mean:
at

2011 Aug 21

1

Multiple R linear models into one Latex table

...s(coef(modelos[[i]])))
var.names[c(k:c(k+l-1))]<-names(coef(modelos[[i]]))
k<-k+l
}
var.names<-unique(var.names)
if(is.null(final.varnames)) {
final.varnames<-var.names
}
if(is.null(model.names)) {
model.names<-paste("Model",1:length(modelos))
}
mat.all<-matrix(data=NA, nrow=length(var.names)*2, byrow=FALSE, ncol=length(model.names), dimnames=list(c(rep(c("coef","sd"),length=length(var.names)*2)), c(model.names)))
dimnames(mat.all)[[1]][c(seq(1,dim(mat.all)[1], by=2))]<-var.names; dimnames(mat.all)[[1]][c(seq(2,dim(...

2017 Jan 19

2

Error en loop anidado con data.table

...a, simplificada en número de niveles por variable, para crear un
ejemplo más sencillo:
id anio t_8a t_10a t_12a rankf8 rankf10 rankf12
1 1 100 220 220 NA NA NA
2 1 140 350 350 NA NA NA
3 2 55 165 165 NA NA NA
4 2 60 200 200 NA NA NA
5 2 100 NA NA NA NA NA
6 3 NA 350 350 NA NA NA
También tengo una matriz, "mat" con la siguiente estructura:
t_8a t_10a t_12a
1 100 200 200
2 50 150 150
3 NA 250 250
La columna rankf8 la quiero rellenar tomando como referencia valores de
t_8a en "datos" en relación al valor de t_8a en la matriz "mat" y según el
año...

2010 Aug 03

4

Need help on upper.tri()

HI, I am really messing up to make a symmetrical matrix using upper.tri() & lower.tri() function. Here is my code:
> set.seed(1)
> mat = matrix(rnorm(25), 5, 5)
> mat
[,1] [,2] [,3] [,4] [,5]
[1,] -0.6264538 -0.8204684 1.5117812 -0.04493361 0.91897737
[2,] 0.1836433 0.4874291 0.3898432 -0.01619...

2000 Aug 21

4

Excluding rows from a matrix

Hi
I have a matrix (4 x 950) and I want to remove 3 rows, where the values
from the first column are 713, 714 and 715. I can select the rows, one
by one, with
mat[mat$first==713,]
mat[mat$first==714,]
...
but I'm unable to (i) select the 3 rows at once, (ii) select the matrix
excluding those rows.
How can I...

2008 Oct 18

1

Error: could not find function "readMat"

Hi All,
I installed this R.matlab package and tried using the sample code
>
> path <- system.file("mat-files", package="R.matlab")
>
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> # Reading all example files
> # - - - - - - - - - - - - - - - - - - - - - -...

2004 Jul 02

2

Error:length of dimnames [2] not equal to array extent ?

Hi everyone,
I have the following problem:
I want to perform a LDA with the function lda().
My data object mat.data is a matrix with dimensions
> dim(mat.data)
[1] 1228 44
and my grouping vector grp has length 1228:
> length(grp)
[1] 1228
Every time I call lda(), the following error message occurs:
> lda(mat.data,grp)
Error in lda.default(x, grouping, ...) : length of dimnames [2] not equal...

2005 Jun 14

2

Plotting rows (or columns) from a matrix in different graphs, not using "par"

...ut using the function "par" and then struggling around with
"axes" and labels etc.
Luckily, I would always have "rows + columns = even number" and the same
"ylim".
The next one could be a sort of example on what I would like to avoid
plotting the rows of the matrix "mat":
########### EXAMPLE ######################
dat <- sort(runif(16, 1, 1000))
mat <- matrix(dat, ncol=4, byrow = T)
y <- seq(1950, 1953)
par(mfrow=c(2,2))
plot(y, mat[1,], ylim=c(1,1000), axes=F, xlab="", ylab="simul.")
box()
axis(side=2, tick=T,...

2013 Apr 29

1

Need help on matrix calculation

Hello again,
Let say I have 1 matrix:
Mat <- matrix(1:12, 4, 3)
rownames(Mat) <- letters[1:4]
Now I want to subscript of Mat in following way:
Subscript_Vec <- c("a", "e", "b", "c")
However when I want to use this vector, I am geting following error:
Mat[Subscript_Vec, ]
Error:...

2011 Dec 05

1

RcppArmadillo compilation error: R CMD SHLIB returns status 1

...eddelbuettel.com/blog/2011/04/23/) I get an error message. Specifically, the R code I was taking from the above example is
### BEGIN EXAMPLE ###
suppressMessages(require(RcppArmadillo))
suppressMessages(require(Rcpp))
suppressMessages(require(inline))
code <- '
arma::mat coeff = Rcpp::as<arma::mat>(a);
arma::mat errors = Rcpp::as<arma::mat>(e);
int m = errors.n_rows; int n = errors.n_cols;
arma::mat simdata(m,n);
simdata.row(0) = arma::zeros<arma::mat>(1,n);
for (int row=1; row<m; row++) {
simdata.row(row) = simdata.row(row-...

1999 Oct 13

1

Q: sort a matrix by picking up columns?

Hi,
I am wondering how to write a function which sorts a matrix by giving a
vector of column numbers.
Suppose we have a matrix (or data frame) "Mat" and I want to obtain
order(Mat[,1], Mat[,3], Mat[,6,], Mat[,8], Mat[,10], Mat[,13])
in order to sort the matrix by those columns. Is there a way to write a
function so that I can give a vector of the...

2013 Oct 03

1

prcomp - surprising structure

...a pca with over 200000 snps for 340 observations (ids). If I plot the
eigenvectors (called rotation in prcomp) 2,3 and 4 (e.g. plot
(rotation[,2]) I see a strange "column" in my data (see attachment). I
suggest it is an artefact (but of what?).
Suggestion:
I used prcomp this way: prcomp (mat), where mat is a matrix with the column
means already substracted followed by a normalisation procedure (see below
for details). Is that okay? Or does prcomp repeat substraction steps?
Originally my approach was driven by the idea to compute a covariation
matrix followed by the use of eigen, but t...

2013 Sep 10

3

to delete lines by means of a vector

Hi
I would like to eliminate a large number of lines of the dataframe df1
The lines to delete are given here by the values of Mat (ex : 2,4,7,10).
but I have a large number (300) values of Mat
dput(df1)
structure(list(Mat = c(1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3,
3, 3, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7,
7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10,
10, 11, 11, 11, 11, 11, 11, 11), Preno...

2006 Jun 15

1

individual scales in random subset of pairwise distance survey

Hello,
I'm curious if anyone has encounted a version of this
problem
(and it's solution) involving finding a consistent set
of scales
for subsets of survey data.
The goal is to obtain peoples' rankings of pairwise
similarity of a large
number of items, on a 1..5 scale for example, and
average these
across people to use as input to MDS:
How similar is object A to B on a 1..5

2007 Oct 16

1

library(car): Anova and repeated measures without between subjects factors

Hi,
sorry if this is explained somewhere but I didn't find anything.
How can I use "Anova" from the car package to test a modell without
between subject's factors? Suppose I have the following data
mat.1 mat.2 mat.3 di ex
1 85 85 88 1 1
2 90 92 93 1 1
3 97 97 94 1 1
4 80 82 83 1 1
5 91 92 91 1 1
6 83 83 84 2 1
7 87 88 90 2 1
8 92 94 95 2 1
9 97 99 96 2 1
10 100 97 100 2 1
11 86...

2012 Aug 21

1

About matrix manipulation

Dear list,
I'm trying to create a matrix by combining the sites that species occur in
a new matrix with species as rows and sites as columns.
The main matrix is "mat":
mat <- as.data.frame(cbind(sp1=c(rep(0, 5), rep(1, 5)),sp2=sample(c(rep(0,
6),rep(1, 4))),
fac=c(rep("a", 3), rep("b", 3),rep("c&...

2016 Sep 16

3

SCEV cannot compute the trip count of Simple loop

I have modified the example test case for UB error, still it didn’t unroll
void foo(int x) {
int p, i = 1;
int mat[9][9][9];
for (p = (x+1) ; p < (x+3) ;p++)
mat[x][p-1][i] = mat[x][p-1][i] + 5;
}
Regard,
Deepali
From: Kevin Choi [mailto:code.kchoi at gmail.com]
Sent: Friday, September 16, 2016 1:20 PM
To: Rai, Deepali
Cc: llvm-dev at lists.llvm.org
Subject: Re: [llvm-dev] SCEV cannot compute the tri...

2016 Sep 16

2

SCEV cannot compute the trip count of Simple loop

Hi All,
I am trying to unroll the below loop, but couldn't as SCEV returns TripCount as 0.
void foo(int x) {
int p, i = 1;
int mat[6][6][6];
for (p = x+3 ; p<= x+6 ;p++)
mat[x][p][i] = mat[x][p][i] + 5;
}
For a quick reference I have added the generated IR compiled with clang using -O3.
Please let me know if this is an known issue in SCEV or I am missing something here ?
; Function Attrs: nounwind readnone uwtable
d...

2010 Jun 19

2

Call by reference or suggest workaround

I have written code to compute multi-indices in R [1] and due to the
recursive nature of the computation I need to pass around the *same*
matrix object (where each row corresponds to one multi-index). As pass
by reference wasn't the default behavior I declared a global matrix
(mat) and used the <<- operator to write to the global matrix. So the
usage would be to call genMultiIndices(3,2) for side effects to
generate all multi-i...

2005 Feb 02

0

Not reproducing GLS estimates

Dear List:
I am having some trouble reproducing some GLS estimates using matrix
operations that I am not having with other R procedures. Here are some
sample data to see what I am doing along with all code:
mu<-c(100,150,200,250)
Sigma<-matrix(c(400,80,16,3.2,80,400,80,16,16,80,400,80,3.2,16,80,400),n
c=4)
sample.size<-100
temp <-
data.frame(ID=seq(...

2006 Nov 05

1

diag()<- in Matrix?

Dear all,
I am trying to use the Matrix package to do some calculations on rather
large and sparse matrices. An example of such a matrix is given below.
mig<-0.2
side<-10
np<-side^2
mig.mat<-matrix(0,np,np)
diag(mig.mat[1:(np-side),(side+1):np])<-mig/4
diag(mig.mat[(side+1):np,1:(np-side)])<-mig&...