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Hello, I wonder by chance if there is a way to reduce computing time for matrix addition or subtraction. With a lot of iterations, it would be helpful to reduce a little amount time. Simple example is as below n...

I want to know how to get trace of product of matrices **faster** when the matrices are really big. Unfortunately the matrices are not symmetric. If anybody know how to get the trace of it, please help me. An example...

I want to try to get a result of element wise addition between a vector and a list. It can be done with "for statement." In order to reducing computing time, I have tried to avoid "for state." If anybody...

Hello, I work on large matrices and found something interesting. For multiplication of matrices, the order has a huge influence on computing time when one of them is a sparse matrix. In the below example, M is a full matrix...

Dear Prof. Ripley, Finally, I succeeded in building R from source. I just changed WINHELP part in 'MkRules' file from WINHELP = CHM to WINHELP = NO. Then R was built successfully. Thank you so much. Yongwan Chun ----- Original Message ----- From: Prof...

Hello, I was trying to build R from source on Windows XP. I installed software which are mentioned from the follow web page http://www.murdoch-sutherland.com/Rtools/ (Last accessed on Nov. 13th, 2006) . Unfortunately, I got error messages...