Re: str2func

[John W. Eaton]

On 3/13/19 1:42 AM, c. wrote:
> Hi,
>
> In the development branch str2func works with any string
>
> > > f = str2func ("_5yVNhWVJWJn47RKnzxPsyb_")
> f = @_5yVNhWVJWJn47RKnzxPsyb_
>
> while in the stable release it returns an error if the string does not name an 
> existing function
>
> > > f = str2func ("_5yVNhWVJWJn47RKnzxPsyb_")
> error: @_5yVNhWVJWJn47RKnzxPsyb_: no function and no method found
>
> Is this intended, or is it a bug?
>
> If it is intended, there are a few places where str2func is used to
> check whether a string is the name of a function (for example ode45, ode15i, 
> ...)
> which should be fixed.
>
> If this is not intended I'll submit a bug

It's intentional, for compatibility with Matlab.  There are a few bug 
reports about it.  But I was fixing a different bug when I also fixed 
the problem with str2func.

https://savannah.gnu.org/bugs/?func=detailitem&item_id=52568
https://savannah.gnu.org/bugs/?func=detailitem&item_id=31821

Why do you need to check?

Also, I would strongly recommend that people use function handles, not 
simple names in character strings.

jwe