Re: Error with Octave

[Colin Macdonald]

On 11/10/16 05:10, Nicholas Jankowski wrote:
> I don't generally work with symbolics, so I don't know if (a) there's a
> way to do a type conversion for numerical symbolic variable. Or (b) if
> there's a symbolic interpolation function.

(a) yes, cast to double:

>> ynew = double(subs(y,'w',0:0.05:10));

But I think it'll be slow and give lots of warnings.  It might be better 
to do something like:

>> y_fcn = function_handle(y);
>> ynew = y_fcn(0:0.05:10);

(b) no, at least not yet.

> If you have reason to believe this should work (matlab compatibility,
> documentation, let us know)

+1 for this.  "Substituting a double array into a symbolic expression" 
seems to be a common thing that folks want to do.  Is there is supposed 
to be an easier way?

best,
Colin