Problem with x axis

2013 10 30
1 个回答
更新时间：2013 10 30
3 次查看（30 天）

0 个投票

Greetings! I'm having some trouble understanding the reason why my x-axis in a matlab plot appears the way it does. I've defined a limit for the x-axis variable(from -2 to 2) and in the plot it shows values from 0 to 4000.
This is my code:
clc;
clear all;
clf;
r=1;
ad=-2*r:0.001:2*r;
d=abs(ad);
Ai=2*r*acos(d./(2*r))-(d/2).*((4*r^2)-d.^2).^0.5;
A=Ai/(pi*r^2);
plot(A);
grid

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回答（1 个）

Honglei Chen
Honglei Chen 2013-10-30
编辑：Honglei Chen 2013-10-30

0 个投票

You need to do
plot(ad,A)
otherwise the x axis is just the indices of elements in A

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Pedro
Pedro
2013-10-30

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2013-10-30

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