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Re: st: mata for-if-else


From   Sabrina Carrossa <carrossa@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: mata for-if-else
Date   Wed, 14 Apr 2010 11:02:35 +0100

I am not sure, but I guess you'd better use the "if qualifier" instead
of the "if-else" command.

On 14 April 2010 10:54, Abhimanyu Arora
<abhimanyu.arora@student.kuleuven.be> wrote:
> Dear statalist,
> I have simplified my problem to a large extent, but essentially has to do
> with using for-if-else commands in mata. I would like to create a matrix 'a'
> whose values depend on an existing matrix 'b' (both are 1000X1 vectors to be
> precise). I need to tell mata the dimension of a first. But all I get after
> executing the commands below is the original vector 'a'. What could be the
> possible error? I have tried adding and removing braces but it is not
> working...
>
>
>
>
> a=J(1000,1,.)
> for(i=1,i<1001,i++) {
> if (b[i]==1){
> a[i]=2
> }
> else {a[i]=3
> }
> }
> a
> end
>
>
> Thanks a lot
> Abhimanyu
>
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>



--
sabrina

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