Re: Memory management in .oct files

[John W. Eaton]

On 19-Mar-2005, Richard Hindmarsh <address@hidden> wrote:

| I guess this means that you decided not to impelemt e.g.
| 
|      xout1(ic1,ir1) = xin1(ir1,ic1); 
| 
| using a helper class.

In what way are you suggesting using a "helper class" and what do you
mean by that?

| The upside of this is speed; the downside is that statements such as
| 
|       double y = xin1(ir+1,ic+1);
| 
| do not trip an error

Why would this cause an error?

| and statements like
| 
|      xout1(ir+1,ic+1) = 1;
| 
| do not resize the matrix, as they do in Octave.

Doing that seemed like a bad idea at the time the Array and Matrix
classes were first implemented.

| Are there function calls e.g.
| 
|      double y = xout1.rhsindexing(ir+1,ic+1);
|      xout1.lhsindexing(ir+1,ic+1) = 0;
| 
| which have the desired behaviour?

Yes, but they don't look quite like this.  I think you are looking for
the set_index, index and assign methods in the Array classes.  I would
bet that you will not like the interface much, but it seemed to be
what I needed for the implementation of the scripting language way
back when, and it seems that so far, no one has contributed the code
to do it in a better way.

| Is there another route to finding this 
| out other than doxygen?

Yes, reading the source without it.  :-)

But seriously, someone has to write the documentation you are
seeking.  Octave is mostly a volunteer project, and some of us are
busy enough writing code and apparently documentation is less fun
because there seems to be less of it.

jwe



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