Pesudocode ----> R code

Given the array T = [1, 2, 3, 4, 5, 6], the following pseudocode

n <- length(T)

for i <- 2 to n step 2 do

T[i] <- T[i-1]

end for


results in:

T = [1, 1, 3, 3, 5, 5]

My goal is to transform the pseudocode to R code:

my code:

T = c(1,2,3,4,5,6)
for (i in T ,by=2) {
   T[i] = T[i-1]

further help is appreciated.

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in that case, i will literally takes the values in T. From the looks of it, you want i to be an integer, so you need to define that sequence separately: for(i in 1:T) for example.


R does not have a by option in for(). So that means you need to modify directly the 1:n to make it have the index you want.

this is not required in R, but implied by the }.

return() is only meaningful within a function.

this one doesn't work, as the value of i gets redefined when you write for ( i in .... So you really need to define first the vector of indices you want to loop on, then start the loop.

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