Why is my graph coming out blank when i try and plot this code?

2019 2 23
2 个回答
更新时间：2019 2 23
4 次查看（30 天）

回答（2 个）

Brian Hart
Brian Hart 2019-2-23

0 个投票

It's an error in your calcuation of y. Check the size and you'll see it's coming out as a scalar. Replace "/" with "./", since you want element-wise division.
Star Strider
Star Strider 2019-2-23

0 个投票

Because you are calculating a single point.
If you use element-wise division here (using ./ rather than /), you get the plot you expect:
x=[0.1:0.1:5];
y=(sin(x))./x;
figure(2)
grid on
plot(x,y)
See the documentation on Array vs. Matrix Operations (link) for an extended discussion.

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