Displaying 2 results from an estimated 2 matches for "examplematrix".
2009 Jan 20
1
Creating a Sparse Matrix from a Sparse Vector
Hello,
I am working with a sparse matrix that is approx. 13,900 by 14,100. My
goal is to select a row out of the matrix and create a new matrix with that
row repeated 13,900 times without having to do any looping. Example:
Starting Matrix:
exampleMatrix
3 x 4 sparse Matrix of class "dgCMatrix"
[1,] 1 . . .
[2,] . 1 . 0.5
[3,] . . 1 ..
New Matrix:..
newExampleMatrix
3 x 4 sparse Matrix of class "dgCMatrix"
[1,] . 1 . 0.5
[2,] . 1 . 0.5
[3,] . 1 . 0.5
When I try the following I get a memory allocation error due to the size...
2008 Mar 13
2
Using loop numbers in write.csv
...my own, but as of
yet...no dice.
1) Is there a way to use the loop number in naming things in R.
Specifically I have a simulation that has two loops. I would like to
be able to write out the results to a csv file after each iteration.
something like:
for (i in 1:10){
exampleMatrix <- matrix(runif(25, 0, 1),5, 5)
write.csv(exampleMatrix, file = "resultsMatrix_i.csv")
}
Where I would get 10 csv files named resultsMatrix_1, resultsMatrix_2
... resultsMatrix_10.
2) On a similar note is there a way to use the loop number when...