That's what I did. 'branches' was shown at the top.
branches = c(5,6,5,5,5)
I tested this. When I copy and paste into R 10.0 I get the result in the
post. Perhaps I should reinstall R. I guess I don't see how much more
narrow I can get than this.
i iInd = 1
for(i in 1:length(branches)) {
print((1:branches[i])+iInd-1) # iInd is a position shift of the index
ni = branches[i]
print(i)
print(ni)
print(c(ni,rep(i,times=ni)))
# ... some interesting other stuff for my project that gets wrecked
because of this issue
iInd = iInd + branches[i]
}
Erik Iverson-3 [via R] wrote:
> Cannot reproduce, what is branches? If you can narrow it down to a
> "commented, minimal, self-contained, reproducible" example, you're far
> more likely to get help from the list.
>
> dkStevens wrote:
>
> > I'm observing odd behavior of the rep(...) procedure when using
> variables as
> > parameters in a loop. Here's a simple loop on a vector 'branches'
> that is
> > c(5,6,5,5,5). The statement in question is
> > print(c(ni,rep(i,times=ni)))
> >
> > that works properly first time through the loop but the second time,
> when
> > branches[2] = 6, only prints 5 values of i.
> >
> > Any ideas, anyone?
> >
> > iInd = 1
> > for(i in 1:length(branches)) {
> > print((1:branches[i])+iInd-1) # iInd is a position shift of
> the index
> > ni = branches[i]
> > print(i)
> > print(ni)
> > print(c(ni,rep(i,times=ni)))
> > # ... some interesting other stuff for my project that gets wrecked
> because
> > of this issue
> > iInd = iInd + branches[i]
> > }
> >
> > # first pass through loop
> > [1] 1 2 3 4 5 # branches[1] + iInd - 1 content
> > [1] 1 # i value to repeat 5 times
> > [1] 5 # ni = 5 on 1st pass
> > [1] 5 1 1 1 1 1 # five values - 1 1 1 1 1 - OK
> >
> > # second pass through loop
> > [1] 6 7 8 9 10 11 # branches[2] + iInd - 1 content
> > [1] 2 # i value to repeat 6 times
> > [1] 6 # ni = 6 on 2nd pass
> > [1] 6 2 2 2 2 2 # 6 'twos' but only shows 5 'twos'
> > print(c(ni,rep(i,times=ni))) - why not 6?
> >
> >
>
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Civil and Environmental Engineering
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