Plotting values from while loop results

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UOE
UOE 2012-11-27
Hi, anyone knows how do i store the values for b in vector form, so that i can plot a graph using the values of b.
a=0
while a<100
b= 2*a
a= a+1
end

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回答（2 个）

Matt Fig
Matt Fig 2012-11-27
编辑：Matt Fig 2012-11-27
a = 1;
while a<=100
b(a) = 2*a;
a = a+1;
end
plot(b)
In general, the more MATLABish way to get b is like this:
b2 = 2*(0:100);
Now b2 is equal to b.
Image Analyst
Image Analyst 2012-11-27
a=0
while a<100
b(a+1) = 2*a;
a = a+1;
end
plot(b);
or even better (to get the "a" axis correct so you'll have b=0 at a=0 instead of at 1):
a = 0 : 99;
b = 2 * a;
plot(a, b, 'ro-');
grid on;

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