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I am not getting a graph when I use mesh

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bsd
bsd 2011-8-17
Dear sir/madam,
When I use mesh() or surf() to plot the graph, I am not getting any graph. It displays only the co-ordinate axes, and nothing in it. It will be totally blank. I am unable to find out the reason for this. Looking forward to hearing from you soon.
Thanking you, BSD

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Walter Roberson
Walter Roberson 2011-8-17
If you were somehow accidentally submitting only a single point to mesh() or surf() then your graph might look blank.
Have you tried tests such as surf(rand(50,50))

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