Petr Mikulik wrote:
> It could be changed to:
> ... Please see "help dgrid3d".
That would be exactly contrary to what I was getting at.
dgrid3d is *not* automatically the right thing to use here. Pointing to
only it but nothing else would make matters worse than they are now.
Before, the error message was precisely that: an error message. It
pointed out the error. A message that points out the wrong solution
would be worse than a message that leaves it for the user to find a
solution.
The key problem is that a shockingly large number of users encounter
this error and have no idea whatsoever what "gridded data" means, so
they don't understand why contouring of non-gridded data might fail.
The right thing to do is to point them to an explanation of "gridded data".
That's why I recommend strongly to point to "help grid_data" instead of
dgrid3d.
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