Dear all,
I am doing 200 times simulation. For each time, I generate a matrix and define some function on this matrix to get a 6 dimension vector as my results.
As the loop should be slow, I generate 200 matrice first, and save them into a list named ma,
then I define zz<-sapply(ma, myfunction)
To my surprise, It almost costs me the same time to get my results if I directly use a loop from 1 to 200. Is it common? Can I improve any further?
Ps, how to count the exact time to finish my code?
Thanks.
Zhen
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