r - creating a 2-dimensional array -


i want create 2 dimensional array of 100,000 100,000 contains values of cp. cp[1,] ,cp[2,] , cp[3,] , on find mean cp[1,] , store meancp[1], mean of cp[2,] , store meancp[2]. there better , faster way of doing have here?

k=0.5 x=numeric() stdcp=numeric() meancp=numeric() u0=0 cp <- matrix(0,100000,100000) (j in 1:100000) {   x=rnorm(100000,0,1)   (i in 1:100000) {         if (j==1){      cp[j,i]= max(0,x[i]-(u0+k))     } else {        cp[j,i]= max(0,x[i]-(u0+k)+cp[j-1,i])     }   }  meancp[j]=mean(cp[j,])  stdcp[j]=sd(cp[j,]) } meancp

so example meancp[1] gives me value between 0.19 , 0.20

you can take reference @ colmeans function. other functions in same html useful.


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