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From |
"Steichen, Thomas J." <[email protected]> |

To |
"'[email protected]'" <[email protected]> |

Subject |
RE: Re: st: looping from 1 to a number defined by a scalar |

Date |
Thu, 27 Dec 2007 15:48:42 -0500 |

```
Tom's code is correct; the = is required:
scalar ng = 6
forvalues i=1/`=ng' {
di `i'
}
1
2
3
4
5
6
However, the code Nicola claimed to work, cannot:
forvalues 1/6 {
di `i'
}
invalid syntax
r(198);
Since the problem is not the forvalues loop, it must be the code within the loop. I suggest setting -trace on- to see where it blows out and/or manually performing each matrix line to find the syntax problem.
Tom
-----------------------------------
Thomas J. Steichen
[email protected]
-----------------------------------
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Kabir Chabal
Sent: Thursday, December 27, 2007 3:33 PM
To: [email protected]
Subject: Re: Re: st: looping from 1 to a number defined by a scalar
Drop the leading "=" before the ng in Tom's code:
scalar ng = 63
forvalues i=1/`ng' {
...
}
On 12/27/07, [email protected] <[email protected]> wrote:
> Same error.
>
> Nicola
>
> At 02.33 25/12/2007 -0500, "Tom Trikalinos" wrote:
> >Subject: Re: st: looping from 1 to a number defined by a scalar
> >
> >try e.g.
> >
> >
> >
> >scalar ng = 63
> >forval i=1/`=ng' {
> > // code
> > noi di " `i'. " _c
> >}
> >
> >
> >tom
> >
> >
> >
> >On Dec 24, 2007 12:15 PM, <[email protected]> wrote:
> >> I would like to create a loop from 1 to a number defined by a scalar, but:
> >> . forvalues 1/ng {
> >> 2. mat p=inv((r1+vu)/ns[`i'])*r1
> >> 3. mat q=r2*(idd-p)
> >> 4. mat xtilde`i' = xmean*p +mux3*(idd-p)+dz*q
> >> 5. }
> >> invalid syntax
> >> r(198);
> >>
> >> However, ng = 63 so that the following works:
> >> . forvalues 1/63 {
> >> 2. mat p=inv((r1+vu)/ns[`i'])*r1
> >> 3. mat q=r2*(idd-p)
> >> 4. mat xtilde`i' = xmean*p +mux3*(idd-p)+dz*q
> >> 5. }
> >>
> >> Anything shorter than...?
> >> local i = 0
> >> while `i' < ng {
> >> 2. local i = `i' + 1
> >> 3. mat p=inv((r1+vu)/ns[`i'])*r1
> >> 4. mat q=r2*(idd-p)
> >> 5. mat xtilde`i' = xmean*p +mux3*(idd-p)+dz*q
> >> 6. }
> >>
> >> Merry Xmas,
> >> Nicola
>
> *
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> * http://www.ats.ucla.edu/stat/stata/
>
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```

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