Comments on: Numbered Argument Specification for Print Functions

By: amin

amin — Sat, 29 Sep 2007 07:34:33 +0000

19+7 ~= 29 september
where r u Loren?
% —————-
u can find several function or operetor who ussed 1st argument.
function myfunc()
fzero(@(y,x) mysubfunc(y,2),2)
fzero(@(y,x) mysubfunc(2,x),2)
function f = mysubfunc(y,x)
f =x+y+1;

By: Daniel Armyr

Daniel Armyr — Fri, 21 Sep 2007 09:50:25 +0000

Loren: Oh, I just noticed I got my negations wrong. I think you still understand what I mean, though.

By: Daniel Armyr

Daniel Armyr — Fri, 21 Sep 2007 06:57:22 +0000

Raymond:
It appears that the – has priority over the :. Try (1:50)-A to get what you expected.

Loren:
That is a nice trick. Not that I will probably ever use it, but still. I would personally say that the obfuscation caused by the longer code sequences in the text do not outweigh the added benefit of being able to reorder or repeat arguments, ignoring the translation case which I will not have to deal with in the near or even remote future.

–DA

By: Raymond

Raymond — Fri, 21 Sep 2007 02:12:16 +0000

Loren,

I have a question about colon notation that is not covered in doc colon. Why does 1:A, where A is a matrix, evaluate to 1:A(1)? This seems to be an important gotcha because if you try to evaluate

A=1:50;
1:50-A

You’ll get an answer equal to 1:49, rather than the more intuitive zeros(size(A)).

–Raymond