[R] How to separate a function by 2 probabilities

Good Mourning, I have a function to generate a matrix as I show part of it; g[j,i]-if (gen[j,i]==0) al1[i,1]+al1[i,1] else ... However i would like that this function occurred with a probability P and that another function (another formula to generate g matrix) with probability P-1 That´s it,

Re: [R] How to separate a function by 2 probabilities

Marcio Define two functions, e.g. f1-function(i,j) i+j f2-function(i,j) i-j then call them based on the probability e.g. 0.7 f - if(runif(1)0.7) f1 else f2 f(1,1) or more compact (if(runif(1)0.7) f1 else f2)(1,1) HTH Schalk Heunis On Thu, Sep 17, 2009 at 5:10 PM, Marcio Resende

Re: [R] How to separate a function by 2 probabilities

Assuming storage is not a problem, first generate two matrices, one by each method, call these A and B. Then if dim(A) = dim(B) = c(m,n) and k = m*n z - rbinom(k,1, .7) result - A*z + B*(1-z) Bert Gunter Genentech Nonclinical Biostatistics -Original Message- From:

Re: [R] How to separate a function by 2 probabilities

Marcio Resende wrote: Good Mourning, I have a function to generate a matrix as I show part of it; g[j,i]-if (gen[j,i]==0) al1[i,1]+al1[i,1] else ... However i would like that this function occurred with a probability P and that another function (another formula to generate g matrix)