Math Forum / Math Software / MATLAB / July 2008

I'm working with a large (16793600x400) logical sparse
array named hits, and when I try to access multiple rows of
the array at once, I get less elements than when I access
the rows individually.  For example:

K>> whos hits
 Name             Size               Bytes  Class      
Attributes

 hits      16793600x400            2049604  logical    
sparse    

K>> hits(9018812,300:400)

ans =

  (1,15)       1
  (1,17)       1
  (1,44)       1
  (1,62)       1
  (1,66)       1
  (1,98)       1

K>> hits(9018843,300:400)

ans =

  (1,1)        1
  (1,87)       1

K>> hits([9018812 9018843],300:400)

ans =

  (2,1)        1
  (1,15)       1
  (1,17)       1
  (1,44)       1
  (1,62)       1
  (1,66)       1
  (1,98)       1

K>> hits(9018843,386)

ans =

    1

The element at hits(9018843,386) is there when I access it
individually or with a single row index, but when I try and
use a subset of the array it dissapears.
Anyone know what's going on?