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[Octave-bug-tracker] [bug #55077] automatic broadcasting for dot product
From: |
Carnë Draug |
Subject: |
[Octave-bug-tracker] [bug #55077] automatic broadcasting for dot product |
Date: |
Fri, 23 Nov 2018 06:56:39 -0500 (EST) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0 |
URL:
<https://savannah.gnu.org/bugs/?55077>
Summary: automatic broadcasting for dot product
Project: GNU Octave
Submitted by: carandraug
Submitted on: Fri 23 Nov 2018 11:56:37 AM UTC
Category: Octave Function
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Feature Request
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: dev
Operating System: Any
_______________________________________________________
Details:
I'm thinking it would be nice if automatic broadcasting also worked in the dot
function, so it would compute dot product between one and many vectors. Like
so:
>> a = [1; 2];
>> b = [4; 5];
>> c = [6; 7];
>> dot (a, b, 1)
ans = 14
>> dot (a, c, 1)
ans = 20
>> dot (a, [b c], 1) # currently it fails
error: dot: sizes of X and Y must match
>> dot (repmat (a, 1, 2), [b c], 1) # could work like this
ans =
14 20
## And for this very simple case, this already works if we don't use dot at
all
>> a' * [b c]
ans =
14 20
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?55077>
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- [Octave-bug-tracker] [bug #55077] automatic broadcasting for dot product,
Carnë Draug <=