Wednesday, March 15, 2006

RE: st: Manual class programming example

..also, since you can't really do mathematical operations on matrices of characters, I'm curious as to what one would or could do with such a matrix that would be difficult or could not be done with a bunch of 1-character string variables in ordinary Stata format.

Al Feiveson

-----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Austin Nichols Sent: Wednesday, March 15, 2006 9:52 AM To: statalist@hsphsun2.harvard.edu Subject: Re: st: Manual class programming example

Are you skipping the initial periods (. prompts) correctly, but incorrectly typing in the numbers (1. and 2. and 3.) after issuing the program command? You would not type the numbers (2. and 3.) in the following: . forv i=1/2 { 2. di `i' 3. } and the same principle applies here. See -help classman- for correct syntax.

On 3/15/06, Ulrich Kohler <kohler@wz-berlin.de> wrote: > We try to reproduce the introductive class programming example shown > in [P] "class - class programming", pg. 28. Unfortunately we get the > error message "set 1 2: class member function not found, r(4023);". > Any ideas what happens here. > > > --------------------------------- > . do 11.class > . version 9 > . class coordinate { > . double x > . double y > . } > . program .set > 1. args x y > 2. .x = `x' > 3. .y = `y' > 4. end > . > end of do-file > > . .coord = .coordinate.new > > . .coord.set 1 2 > set 1 2: class member function not found r(4023); > --------------------------------------

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