[R] problem with for()

[Spencer Graves]

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spencer graves

Peter Dalgaard wrote:

> Simone Gabbriellini <ogabbrie at tin.it> writes:
> 
> 
>>Dear list,
>>can someone tell me why this two pieces of code give me the same  
>>results?
>>
>> > for(i in 0:5){ sum[i] = i }
>> > sum
>>[1] 1 2 3 4 5
>>
>> > for(i in 1:5){ sum[i] = i }
>> > sum
>>[1] 1 2 3 4 5
>>
>>shouldn't the first one be
>>
>>0 1 2 3 4 5
> 
> 
> No. Indexing starts at 1 in R.
> 
> Next, figure out this:
> 
> 
>>sum=0
>>for(i in 5:-5){ sum[i] = i }
>>sum
> 
> [1] -5 -5 -5 -5 -4
> 
> 

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Spencer Graves, PhD
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