[R] Replacing the for loop for time series buid-up

[Torch]

Hi,
is there a function that replaces the following code?

n=200
boot.x[1]=odhad+boot.res[1]  #(boot.x[0]=1)

      for (j in 1:(n-1)) {
      boot.x[j+1]=odhad*boot.x[j]+boot.res[j+1]
      }

This is nested in two other loops, and I am looking for some way to improve
code performance
I tried sapply and cumprod but no success.

Thanks
Jan
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