syntax of find

[Thorsten Meyer]

In the documentation of cs-lists I find the following example:

x = ceil (randn (10, 1));
in = struct ("call1", {x, Inf, "last"},
             "call2", {x, Inf, "first"});
out = struct ("call1", cell (2, 1), "call2", cell (2, 1));
[out.call1] = find (in.call1);
[out.call2] = find (in.call2);

With the current tip, it fails, because octave tries to allocate for an
infinitely large return vector. I guess, that at some point, "inf" as the second
input argument to find meant "all". By experimenting, I found that giving a
negative number (or even -inf) instead of Inf will find all nonzero elements 
now.

Is that compatible behaviour?

What does matlab say to

find([1, 0, 1, 0, 1], -1, "last")

and

find([1, 0, 1, 0, 1], inf, "last")

?

Thanks

Thorsten