How to read a table with dynamic numbers of rows and columns

[arr...@gmail.com]

Hi folks, 

            This is really a native question. I have a table with # of rows determined by set R and # of columns determined by set C. Both sets are not known until data input started.  I would like to know how should I read such a table.  

Thanks in advance!

Feng

[arr...@gmail.com]

Never mind. I found a piece of old code that has this. 

read{i in I, j in J} a[i,j] < input.txt;