How to plot x and y with x evaluated in a function

2020 6 20
1 个回答
回答已采纳
更新时间：2020 6 20
20 次查看（30 天）

0 个投票

It seems to be such an easy thing but I can't right remember
So, I've got an array of x values (2708x1) and y values(2708x1) and a function Amp(x). How to plot(Amp(x),y) ?

请先登录，再回答此问题。

 采纳的回答

madhan ravi
madhan ravi 2020-6-20

0 个投票

x = ...;
y = ...;
plot(Amp(x),y)

4 个评论
显示 2更早的评论 隐藏 2更早的评论

Niklas Kurz
Niklas Kurz 2020-6-20
Thank you for you help, however something still goes wrong:
Amp = (6.344*10^(-7)*x^6 + 3.938*10^(-5)*x^5 -0.001053*x^4 -0.01953*x^3 + 0.2699*x^2 + -13.92*x + 502.4);
x = M{:,1};
y = M{:,2};
plot(Amp(x),y)
Niklas Kurz
Niklas Kurz 2020-6-20
I could type
Ampx = (6.344*10^(-7)*x.^6 + 3.938*10^(-5)*x.^5 -0.001053*x.^4 -0.01953*x.^3 + 0.2699*x.^2 + -13.92*x + 502.4);
and then
plot (Ampx, y)
But isn't there a faster way?
Niklas Kurz
Niklas Kurz 2020-6-20
I guess I posed my question in the wrong way, I'll re-ask it. Thank you for your effort :)
madhan ravi
madhan ravi 2020-6-20
Amp = @(x) 6.344*10^(-7)*x.^6 + 3.938*10^(-5)*x.^5 -0.001053*x.^4 -0.01953*x.^3 + 0.2699*x.^2 + -13.92*x + 502.4;
x = M{:,1};
y = M{:,2};
plot(Amp(x),y)

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Mathematics 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by