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Hi,
     I  have a graph where my y axis are scaled in the interval of 500 ,i
want to make them i the interval of 2,so pls can u help me out.

Hi karan,
This appears to be a nonsensical request, as you seem to be asking for 
the number of tick marks on the Y axis to be multiplied by 250 times. R 
typically puts five or six tick marks on an axis by default, and 1250 to 
1500 tick marks would produce a solid line if you could manage to do it. 
Perhaps if you could give a bit more information about what you want to 
achieve we could be more helpful.

Jim