small bug fix in ppval

[Shai Ayal]

On Fri, Apr 25, 2008 at 11:07 AM, Shai Ayal <shaiay at gmail.com> wrote:
> On Fri, Apr 25, 2008 at 10:44 AM, Jaroslav Hajek <highegg at gmail.com> wrote:
>  > Shai,
>  >
>  >  the "l" and "r" options for lookup should be documented in new
>  >  lookup's inline documentation (via `help lookup'). If it is not clear,
>  >  blame me (and please report what is broken). Shortly, "l" means extend
>  >  the leftmost interval to infinity, while "r" means the same for the
>  >  rightmost interval. Thus, "lr" is frequently used to get indices that
>  >  are guaranteed to fall inside the table (provided that the table is at
>  >  least 2 elements long).
>  >
>  >  The common expression with the old lookup was to use
>  >  lookup(x(2:end-1), y)+1. This is dangerous, as it breaks for
>  >  decreasing tables of length 3
>  >  (see http://www.nabble.com/binary-lookup-tt16029897.html#a16089657)
>  >
>  >  I'm not sure whether this case can occur here, I've replaced all the
>  >  lookup(x(2:end-1)) expressions I could find since the new form is also
>  >  faster (no temporary arrays).
>  >
>
>
>  Hmm...
>
>  Maybe this change was not propagated to the dev branch? I'm using the
>  latest octave graphics release and it was merged with the main octave
>  repository at Apr 22.
>
>  what I'm seeing in my lookup.m:
>  function idx = lookup (table, xi)
>
>  so this is clearly to old version
>
>  Shai
>

OK, I understand the problem now -- the old lookup.m was not removed
by the merge process. Ooops...
How do we make sure thid does nto happen again in future merges?
How do we remove all old files which were not removed in previous merges?

Shai