I have two set data and I want to calculate the area in different x and plot the area curve with respect to X

3 次查看（过去 30 天）
Misi
Misi 2023-10-10
评论： Star Strider 2023-10-10
For example
x=[1 1.5 1.7 2 2.2 2.6 2.8];
y=[0 2 6 7 8 10 5];
Now I wanted to plot the area under these data with respect to x

请先登录，再回答此问题。

采纳的回答

Star Strider
Star Strider 2023-10-10
Ran in:
Perhaps this —
x=[1 1.5 1.7 2 2.2 2.6 2.8];
y=[0 2 6 7 8 10 5];
int_y = cumtrapz(x, y);
figure
plot(x, y, 'DisplayName','Data')
hold on
plot(x, int_y, 'DisplayName','Cumulative Integral of ‘y’')
hold off
grid
xlabel('x')
ylabel('y')
legend('Location','NW')
.

更多回答（1 个）

dpb
dpb 2023-10-10
Ran in:
x=[1 1.5 1.7 2 2.2 2.6 2.8];
y=[0 2 6 7 8 10 5];
A=trapz(x,y); % the total area (one number)
a=cumtrapz(x,y); % each segment area (last is total)
[A a(end)] % show above is so...
ans = 1×2
9.8500 9.8500
plot(x,a,'-x') % plot the cumulative area, show where the data points are
See trapz and cumtrapz for further details...

类别

在 Help Center 和 File Exchange 中查找有关 Graphics Performance 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