Hi there
Thanks for the suggestions thus far. I'm not really using an array though ... I'm using a PDL matrix ... as follows:

 [
 [  2.7650514           0           0           0           0         
+  0           0]
 [          0   1.2905497           0           0           0         
+  0           0]
 [          0           0  0.54930597           0           0         
+  0           0]
 [          0           0           0  0.23264228           0         
+  0           0]
 [          0           0           0           0  0.19463077         
+  0           0]
 [          0           0           0           0           0  0.16669
+291           0]
 [          0           0           0           0           0         
+  0 0.095157451]
]
[download]

And I've suddenly realised that what I actually want (sorry guys, I know its rude to chage the 'specs' after the initial posting) is a 7 row by 35 column PDL matrix ... where rows like this

[ 0   0    0    0    0      0     0]
[download]

are attached to the bottom of the matrix above .. so that the end result is a 7 row by 35 column PDL matrix. Does that make sense? :)