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[Octave-bug-tracker] [bug #45758] for 'range' type input some functions
From: |
Rik |
Subject: |
[Octave-bug-tracker] [bug #45758] for 'range' type input some functions fail to return type range |
Date: |
Thu, 20 Aug 2015 15:35:51 +0000 |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:35.0) Gecko/20100101 Firefox/35.0 |
Follow-up Comment #6, bug #45758 (project octave):
The possible source of confusion I see is not that range types are not
preserved in some functions, but that the class of the range is always double.
I think the base assumption might be that a range constructed from type X
variables would itself be of type X. See an example below with uint8.
octave:1> lo = uint8 (1)
lo = 1
octave:2> hi = uint8 (5)
hi = 5
octave:3> x = lo:hi
x =
1 2 3 4 5
octave:4> class (x)
ans = double
octave:5> y = uint8 (lo:hi)
y =
1 2 3 4 5
octave:6> class (y)
ans = uint8
I'm not arguing to change this, as I think it would involve a lot of code for
very few actual usage cases; just pointing out that this probably violates
people's internal expectations.
If there was a change to make to the Range class I would like to see the
extension to column vectors. I understand why Ranges were implemented first
for row vectors to compact the argument to a for loop. But it has always
seemed a little strange that x = 1:50 is fine but taking the transpose with y
= x' undoes all of the magic.
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- [Octave-bug-tracker] [bug #45758] for 'range' type input some functions fail to return type range, Michael Godfrey, 2015/08/14
- [Octave-bug-tracker] [bug #45758] for 'range' type input some functions fail to return type range, Michael Godfrey, 2015/08/14
- [Octave-bug-tracker] [bug #45758] for 'range' type input some functions fail to return type range, Rik, 2015/08/14
- [Octave-bug-tracker] [bug #45758] for 'range' type input some functions fail to return type range, Michael Godfrey, 2015/08/14
- [Octave-bug-tracker] [bug #45758] for 'range' type input some functions fail to return type range, John W. Eaton, 2015/08/20
- [Octave-bug-tracker] [bug #45758] for 'range' type input some functions fail to return type range, John W. Eaton, 2015/08/20
- [Octave-bug-tracker] [bug #45758] for 'range' type input some functions fail to return type range,
Rik <=
- [Octave-bug-tracker] [bug #45758] for 'range' type input some functions fail to return type range, John W. Eaton, 2015/08/21
- [Octave-bug-tracker] [bug #45758] for 'range' type input some functions fail to return type range, Michael Godfrey, 2015/08/21