[R] ifelse question

[jropers@freesurf.fr]

...ifelse,  a function of three **vector** arguments....

Yes !!
I misunderstood the functioning of ifelse.
Thanks
Jacques.


Peter Dalgaard wrote:
> jropers at freesurf.fr wrote:
>> What is puzzling me is that rnorm(1) is only evaluated *twice*, one 
>> time for each branch, with only 2 different random deviates, instead 
>> of giving ten different random deviates. y1 has indeed 10 values but 
>> with only 2 different ones.
>>   
> I find it more puzzling why you expect that ifelse,  a function of 
> three vector arguments, would cause its input arguments to be 
> reevaluated for  every element of the result.
>
>> I would like to have rnorm be evaluated for each row and collect ten 
>> *different* random deviates.
>>
>> y1
>>  [1] 0.4087172 0.7707796 0.4087172 0.4087172 0.7707796 0.4087172 
>> 0.4087172
>>  [8] 0.7707796 0.7707796 0.4087172
>>
>>
>> Thanks.
>>
>> Jacques.
>>
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>>   
>
>