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Re: problem plotting "N-d object"
From: |
CdeMills |
Subject: |
Re: problem plotting "N-d object" |
Date: |
Mon, 20 Feb 2012 00:39:33 -0800 (PST) |
Sergei Steshenko-2 wrote
>
>
>
> I have just replied Ben and you - the object is 1-d, no size reduction is
> necessary, the root cause/problem is that Octave wrongly considers the
> object to be N-d.
>
> Not dealing with the root cause is losing track IMO.
>
>
OK. I looked at the other side of the Force:
x=randn(3, 3, 5);
y = x(2, 3, :);
size(y)
ans =
1 1 5
isvector(y)
0
plot(y)
??? Error using ==> plot
Data may not have more than 2 dimensions
This is ML2011A. The consensus about Octave is to maintain a good amount of
compatibility between both, to ease transitions.
At this stage I agree that you're right on the ideas, but we should be
carefull to avoid a scenario as
1) B. Abbott implements plotting for N-D objects where N-1 dims are
singleton
2) people start using this new interface
3) The MathWorsk implement their own N-D plotting in a incompatible way
with Ben's approach
4) Octave maintainers must once again change their interface without
breaking the "legacy " code written between steps two and three.
This is why I would be more in favor of a "squeezable" class. By only
overloading the "isvector" method, the previous scenario would became:
x=squezable(randn(3, 3, 5));
y = x(2, 3, :);
size(y)
ans =
1 1 5
isvector(y)
1
This way, we follow your arguments that things with only one non-singleton
dimension are vectors, but without introducing changes with ML. And when ML
will implement a change in their 'plot' function, we may reflect his change,
and keep the code written around the squeezable class working.
Regards
Pascal
--
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- Re: problem plotting "N-d object", (continued)
- Re: problem plotting "N-d object", Ben Abbott, 2012/02/17
- Re: problem plotting "N-d object", CdeMills, 2012/02/18
- Re: problem plotting "N-d object", Ben Abbott, 2012/02/18
- Re: problem plotting "N-d object", Jordi GutiƩrrez Hermoso, 2012/02/18
- Re: problem plotting "N-d object", Sergei Steshenko, 2012/02/19
- Re: problem plotting "N-d object", Ben Abbott, 2012/02/19
- Re: problem plotting "N-d object", Sergei Steshenko, 2012/02/19
- Re: problem plotting "N-d object", Ben Abbott, 2012/02/19
- Re: problem plotting "N-d object", CdeMills, 2012/02/19
- Re: problem plotting "N-d object", Sergei Steshenko, 2012/02/19
- Re: problem plotting "N-d object",
CdeMills <=
- Re: problem plotting "N-d object", Pascal A. Dupuis, 2012/02/20
- Re: problem plotting "N-d object", Jordi GutiƩrrez Hermoso, 2012/02/20
- Re: problem plotting "N-d object", Pascal A. Dupuis, 2012/02/20
- Re: problem plotting "N-d object", Ben Abbott, 2012/02/20
- Re: problem plotting "N-d object", CdeMills, 2012/02/21
- Re: problem plotting "N-d object", Ben Abbott, 2012/02/21
- Re: problem plotting "N-d object", Sergei Steshenko, 2012/02/21
- Re: problem plotting "N-d object", Ben Abbott, 2012/02/17
- Re: problem plotting "N-d object", Ben Abbott, 2012/02/18
- Re: problem plotting "N-d object", James Sherman Jr., 2012/02/17