matrix visualization using imagesc

I used imagesc to visualize a matrix. I am attaching the plot i got here. Most of the values are in the same blue. what can be done to see more variation in data. can someone help me.

Answer 1

[Henric Rydén]

range = [0 100]; 
imagesc(A,range)

[Yuvashree Mani Urmila]

Thanks.every value changes to almost blue now. i am attaching the plot here.

[Henric Rydén]

You have not attached the plot