How do I make a graph from this integral?

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burningempires
burningempires on 20 Nov 2014
D = input('0-100');
y = 0:D;
p = 62.5;
g =@(y) (40-20.*exp(-(0.01.*y).^2)).*p.*(D-y);
T = integral(g, 0, D)
This first part works as intended, I've confirmed this, but the plot that's supposed to show the integral on the y-axis and D (from 0-100, not y) on the x-axis doesn't.
D = 0:100;
plot(D,T,'*')
xlim([10 100])
I get a horizontal line. So the integral seems "stuck" at that value while D changes from 0 to 100. I'm a total newbie so please be gentle!

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