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indexing arrays and struct arrays with {}?
From: |
Thorsten Meyer |
Subject: |
indexing arrays and struct arrays with {}? |
Date: |
Sat, 06 Jun 2009 16:19:58 +0200 |
User-agent: |
Mozilla-Thunderbird 2.0.0.19 (X11/20090103) |
Hi,
While working on the documentation of container types, I found that it is no
longer possible to assign to a subarray of cell array c like this:
c{:,2} = 1
Instead, the {} operators consistently return a cslist of elements of a cell
array. So, the {} operator now can be seen not to mean
"index a cell array"
but
"generate a cs-list of elements (of a cell array)"
At the same time indexing with () means
"access a subarray"
for arrays, cell arrays and struct arrays.
I think it could be quite useful to generalize the {} operator to arrays and
structs as well, such that
a = [1, 2, 3; 4, 5, 6];
a{:,2}
gave the cs-list
2, 5
And
b = struct("c", {1,"element2", "element3", 4});
b{[2,3]}
gave the cs-list
b(1), b(2)
Unfortunately, I do not have the c++ (or parser ?) skills to implement this.
What do you think of such a change? How much work would it be? And can I maybe
interest one of you octave core programmers in this (:-)?
regards
Thorsten
- indexing arrays and struct arrays with {}?,
Thorsten Meyer <=