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Re: st: sorting rows with a key.


From   "Ashim Kapoor" <ashimkapoor@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: sorting rows with a key.
Date   Fri, 12 Sep 2008 13:03:27 +0530

Hello.

Could someone please tell me where this mata code is wrong ? It gives
an error as " unexpected end of line ". I am making some basic mistake
which  I can't figure out.

Thank you,
Ashim.

program define keysortrows
    version 9
    syntax varlist(min=2) ,         ///
    [                               ///
        key(string)		    ///	
    ]

    marksample touse, strok novarlist

    mata _keysortrower("`varlist'", "`key'","`touse'")


end

mata
void _keysortrower(string scalar varlist,string scalar key,string scalar touse)
{

	 real matrix x

	 st_view(X,.,tokens(varlist),touse)
	 st_view(Y,.,tokens(key), touse)


	for(i=1;i<=rows(X);i++){
	x=(X[i,.]\Y[i,.])

	x=sort(x',2)

	x=x'
	X[i,.]=x[1,.]
	Y[i,.]=x[2,.]
}


end

clear

use data

keysortrows(x1 x2), key(k1 k2)

list








On 9/12/08, Ashim Kapoor <ashimkapoor@gmail.com> wrote:
> Hello Marten,
>
> Thank you for your reply. I never quite could understand what ///
> means ? Is that a comment ? Could you please tell me what that is ? I
> was modifying a code where I found that.
>
> Thank you,
> Ashim
>
> On 9/12/08, Maarten buis <maartenbuis@yahoo.co.uk> wrote:
> > I haven't looked at the rest of the program, but you should have
> > commented out a hard return after the line: -key(string)-
> >
> >  program define keysortrows
> >     version 9
> >    syntax varlist(min=2) ,         ///
> >     [                               ///
> >         key(string)                 ///
> >     ]
> >
> > (You don't want to know how often I made that mistake when adding a new
> > option...)
> >
> > -- Maarten
> >
> > --- Ashim Kapoor <ashimkapoor@gmail.com> wrote:
> >
> > > Hello everyone,
> > >
> > > I have written a small program which sorts rowwise using a "key". I
> > > am
> > > new to mata so maybe I am not getting the syntax correct although I
> > > believe I have the logic of the code right.
> > > The code gives me an error " invalid syntax " after the execution of
> > > the line
> > >  "keysortrows(x1 x2), key(k1 k2) "
> > >
> > > Could someone please point out my mistake?
> > >
> > > Below is the code :-
> > >
> > > program define keysortrows
> > >     version 9
> > >     syntax varlist(min=2) ,         ///
> > >     [                               ///
> > >         key(string)
> > >     ]
> > >
> > >     marksample touse, strok novarlist
> > >
> > >     mata _keysortrower("`varlist'", "`key'","`touse'")
> > >
> > >
> > > end
> > >
> > >
> > > clear
> > >
> > > use data
> > >
> > > keysortrows(x1 x2), key(k1 k2)
> > >
> > > list
> > >
> > > version 9
> > > mata
> > > void _keysortrower(string scalar varlist,string scalar key, string
> > > scalar touse)
> > > {
> > >
> > >        real matrix x
> > >
> > >        st_view(X,.,tokens(varlist),touse)
> > >        st_view(Y,.,tokens(key), touse)
> > >
> > >
> > >       for(i=1;i<=rows(X);i++){
> > >       x=(X[i,.]\Y[i,.])
> > >
> > >       x=sort(x',2)
> > >
> > >       x=x'
> > >       X[i,.]=x[1,.]
> > >       Y[i,.]=x[2,.]
> > >
> > > }
> > > end
> > > *
> > > *   For searches and help try:
> > > *   http://www.stata.com/help.cgi?search
> > > *   http://www.stata.com/support/statalist/faq
> > > *   http://www.ats.ucla.edu/stat/stata/
> > >
> >
> >
> > -----------------------------------------
> > Maarten L. Buis
> > Department of Social Research Methodology
> > Vrije Universiteit Amsterdam
> > Boelelaan 1081
> > 1081 HV Amsterdam
> > The Netherlands
> >
> > visiting address:
> > Buitenveldertselaan 3 (Metropolitan), room N515
> >
> > +31 20 5986715
> >
> > http://home.fsw.vu.nl/m.buis/
> > -----------------------------------------
> >
> >
> >
> > *
> > *   For searches and help try:
> > *   http://www.stata.com/help.cgi?search
> > *   http://www.stata.com/support/statalist/faq
> > *   http://www.ats.ucla.edu/stat/stata/
> >
>
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



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