Anas Jamshed
2021-Oct-28 08:19 UTC
[R] Need help to print matrix with element and position
I create a matrix of size 3x3 called mat_1 and then I want to iterate over
all the values one by one and print the element as well as the position in
the matrix:
My code is :
mat_1= matrix(
c('1','2','3','4','5','6','7','8','9'),
nrow = 3, ncol 3,byrow = TRUE)
mat_1
# Loop over my_matrix
for(row in 1:nrow(mat_1)) {
for(col in 1:ncol(mat_1)) {
print(mat_1[row, col])
}
}
But I don't know how to print elements and positions as well of this matrix?
[[alternative HTML version deleted]]
Hi Anas, How about: cat(row,col,mat_1[row,col],"\n") Jim On Thu, Oct 28, 2021 at 7:19 PM Anas Jamshed <anasjamshed1994 at gmail.com> wrote:> > I create a matrix of size 3x3 called mat_1 and then I want to iterate over > all the values one by one and print the element as well as the position in > the matrix: > > My code is : > > mat_1= matrix( c('1','2','3','4','5','6','7','8','9'), nrow = 3, ncol > 3,byrow = TRUE) > mat_1 > # Loop over my_matrix > for(row in 1:nrow(mat_1)) { > for(col in 1:ncol(mat_1)) { > print(mat_1[row, col]) > } > } > > But I don't know how to print elements and positions as well of this matrix? > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.
Rui Barradas
2021-Oct-28 09:39 UTC
[R] Need help to print matrix with element and position
Hello, With no loops: cbind( row = c(t(row(mat_1))), col = c(t(col(mat_1))), mat_1 = as.numeric(t(mat_1)) ) If the matrix entries are not numeric, use cbind.data.frame. This will keep the row and column numbers as numbers, the default cbind method would coerce them to the class of mat_1's elements. cbind.data.frame( row = c(t(row(mat_1))), col = c(t(col(mat_1))), mat_1 = c(t(mat_1)) ) Hope this helps, Rui Barradas ?s 09:19 de 28/10/21, Anas Jamshed escreveu:> I create a matrix of size 3x3 called mat_1 and then I want to iterate over > all the values one by one and print the element as well as the position in > the matrix: > > My code is : > > mat_1= matrix( c('1','2','3','4','5','6','7','8','9'), nrow = 3, ncol > 3,byrow = TRUE) > mat_1 > # Loop over my_matrix > for(row in 1:nrow(mat_1)) { > for(col in 1:ncol(mat_1)) { > print(mat_1[row, col]) > } > } > > But I don't know how to print elements and positions as well of this matrix? > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >