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Re: Octave/Matlab compatibility
From: |
John W. Eaton |
Subject: |
Re: Octave/Matlab compatibility |
Date: |
Mon, 24 Nov 1997 13:11:28 -0600 |
On 24-Nov-1997, Heber Farnsworth <address@hidden> wrote:
| I agree. Returning a numeric result is the exception. It is much
| more common (in my work) that I want to be able to enter a string
| and concatenate strings and get another string.
I believe that concatenating two strings works fine. It's just a
question of what happens when someone mixes strings and numbers
(apparently most often by growing a string starting with an empty
matrix).
In any case, this is fixed for the next release.
* The new built-in variable `implicit_num_to_str_ok' controls
whether Octave converts expressions like `[97, 98, 99, "123"]' to
strings. The default value is 0 unless you use --traditional.
octave:1> implicit_str_to_num_ok = 0;, implicit_num_to_str_ok = 0;
octave:2> [97, 98, 99, '123']
error: invalid conversion from string to real matrix
error: invalid conversion from string to real matrix
octave:2> implicit_str_to_num_ok = 0; implicit_num_to_str_ok = 1;
octave:3> [97, 98, 99, '123']
ans = abc123
octave:4> implicit_str_to_num_ok = 1; implicit_num_to_str_ok = 0;
octave:5> [97, 98, 99, '123']
ans =
97 98 99 49 50 51
octave:6> implicit_str_to_num_ok = 1; implicit_num_to_str_ok = 1;
octave:7> [97, 98, 99, '123']
ans = abc123
The defaults for these variables are both 0 unless you use
--traditional. Then the defaults are both 1.
jwe