幽幽悠悠勇

5樓: Originally posted by dbb627 at 2014-10-09 17:22:14
u=-5:0.2:10;
t=-10:0.2:0;
=meshgrid(u,t);
I=U+T;
I(I<=0)=NaN;
mesh(U,T,I)
figure
X=find(I>0);
figure
plot(U(X),T(X),'.')

非常感謝，我試了一下，出現(xiàn)了三張圖，其中figure2是空?qǐng)D，不太明白，請(qǐng)大俠再指點(diǎn)一下，謝謝

贊一下

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6樓2014-10-12 10:02:02

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6樓: Originally posted by 幽幽悠悠勇 at 2014-10-12 10:02:02
非常感謝，我試了一下，出現(xiàn)了三張圖，其中figure2是空?qǐng)D，不太明白，請(qǐng)大俠再指點(diǎn)一下，謝謝...

u=-5:0.2:10;
t=-10:0.2:0;
[U,T]=meshgrid(u,t);
I=U+T;
I(I<=0)=NaN;
mesh(U,T,I) %z aixs display I>0
X=find(I>0);
figure
plot(U(X),T(X),'.') % plot 滿(mǎn)足I>0的[U,T]

贊一下

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The more you learn, the more you know, the more you know, and the more you forget. The more you forget, the less you know. So why bother to learn.

7樓2014-10-12 10:08:05

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