Re: clearing intermediate variables at end of functions?

[Daniel J Sebald]

On 08/30/2014 12:26 AM, Daniel J Sebald wrote:

It might be interesting to extend the nchoosek() function to cells, but 
the problem is that the cell presentation doesn't lend itself to showing 
the groupings.  For example, say there are four balls (red, green, 
yellow, black), two chosen with replacement:

> > OBJECTS = {'Red' 'Green' 'Yellow' 'Black'}
OBJECTS =
{
  [1,1] = Red
  [1,2] = Green
  [1,3] = Yellow
  [1,4] = Black
}
> > I = nchoosek([1:4], 2)
I =

   1   2
   1   3
   1   4
   2   3
   2   4
   3   4

> > OBJECTS(I)
ans =
{
  [1,1] = Red
  [2,1] = Red
  [3,1] = Red
  [4,1] = Green
  [5,1] = Green
  [6,1] = Yellow
  [1,2] = Green
  [2,2] = Yellow
  [3,2] = Black
  [4,2] = Yellow
  [5,2] = Black
  [6,2] = Black
}

So, nchoose(OBJECTS, 2) would have the result above.  That seems more 
likely to be used as opposed to something like:

> > nchoosek([12 23 75 223], 2)
ans =

    12    23
    12    75
    12   223
    23    75
    23   223
    75   223

If only the cell contents could be presented in a matrix format.  (A GUI 
could certainly use table presentation for cells.)

Just a thought,

Dan