plot of y = 2.*(x.^4 - x.^2) isn't right

2 次查看（过去 30 天）
Anna
Anna 2022-3-27
评论： Anna 2022-3-27
I set x = linspace(-10, 10); y = 2.*(x.^4 - x.^2); plot(x, y)
and the graph is not correct. what did I do wrong?
  3 个评论
显示 1更早的评论
Mahmoud Ashraf
Mahmoud Ashraf 2022-3-27
hi can you write you equation (handwritten)
DGM
DGM 2022-3-27
Ran in:
Seems fine to me.
x = linspace(-10, 10);
y = 2.*(x.^4 - x.^2);
plot(x, y)
It might be that you're working in a figure that's already had hold on set, and the axis extents are such that the curve is not visible. If that's the case, either clear the figure (clf) or set the axis limits to something appropriate (use xlim() or ylim())

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Dave B
Dave B 2022-3-27
Ran in:
I'm pretty sure that's correct, were you expecting to see more of a w-like shape? You might have to zoom in a bit for that (and it helps to add some more points:
tiledlayout(1,2)
nexttile
x = linspace(-10, 10);
y = 2*(x.^4 - x.^2);
plot(x, y)
title('default limits')
nexttile
x = linspace(-10, 10, 1000);
y = 2*(x.^4 - x.^2);
plot(x, y)
ylim([-1 6])
title('more points, zoomed in')

类别

在 Help Center 和 File Exchange 中查找有关 Graphics Performance 的更多信息

标签

产品


版本

R2022a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by