Pesudocode ----> R code

[Farm]

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

return(T)

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)
 n=length(T)
 
i=2
for (i in T ,by=2) {
   T[i] = T[i-1]
 end
   }
 return(T)

further help is appreciated.
thanks

[nirgrahamuk]

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[AlexisW]

@Farm

for (i in T

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.

Also,

@Farm

for (i in T ,by=2) {

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.

@Farm

end

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

@Farm

return(T)

return() is only meaningful within a function.

@Farm

i=2

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.