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Custom type subscript assignment
From: |
John W. Eaton |
Subject: |
Custom type subscript assignment |
Date: |
Wed, 22 Jul 2009 12:10:14 -0400 |
On 22-Jul-2009, r-j-k wrote:
| Hi, I'm close to finishing my custom matrix type. I have implemented
| subscript assignment and it works correctly:
|
| octave:13> x = my_matrix([10, 9, 8]);
| octave:14> x(2)
| ans = 9
| octave:15> x(2) = 5
| x =
|
| 10 5 8
|
| However, when I make a copy of x, y = x, and try to assign to either y or x,
| the behaviour is as if x or y are undefined:
|
| octave:16> x = my_matrix([10, 9, 8]);
| octave:17> y = x
| y =
|
| 10 9 8
|
| octave:18> y(2) = 5
| y =
|
| 0 5
|
| After the value of y is changed as above, I can correctly assign to x:
|
| octave:19> x(2) = 5
| x =
|
| 10 5 8
|
|
| I realise that y is not a deep copy and something related to that is
| probably causing my problem. I know that my subscript assign operator is not
| being called at all in the problematic case. Any ideas how to correct this?
If you want help with some detail like this, I think your best bet is
to post the code so other people can try it out and (maybe) give you
somem help.
jwe