as.matrix(c(1,1)) gives a matrix with only one column, but your function
assumes you have at least two columns (you refer to x[,2]). Please make your
examples reproducible (run it yourself in a fresh instance of R) to obtain best
results with questions on this list.
However, you might just be
-project.org
Subject: [R] Stop R from changing matrix to numeric
I have the following cost function:
cost-function(x){
x[,1]*sin(4*x[,1])+1.1*x[,2]*sin(2*x[,2])
}
If I send in a matrix which has MORE than one row and 2 columns, this works
fine. However, if I try to do cost(t(as.matrix(c(1,1
I have the following cost function:
cost-function(x){
x[,1]*sin(4*x[,1])+1.1*x[,2]*sin(2*x[,2])
}
If I send in a matrix which has MORE than one row and 2 columns, this
works fine. However, if I try to do cost(t(as.matrix(c(1,1 it
gives me an index error. When I tried debugging it, I found
, December 17, 2014 7:55 AM
To: r-help@r-project.org
Subject: [R] Stop R from changing matrix to numeric
I have the following cost function:
cost-function(x){
x[,1]*sin(4*x[,1])+1.1*x[,2]*sin(2*x[,2])
}
If I send in a matrix which has MORE than one row and 2 columns, this
works fine
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