# How to plot peaks on desired location in a 3D plot?

2 views (last 30 days)
Sadiq Akbar on 21 Feb 2022
Commented: Star Strider on 2 Mar 2022
There are two vectors that will make an xy-plane. I want to draw a peak pointing in z-direction on a desired location on the xy-plane. In code form it is:
x=linspace(0,180,100);% 1st vector
y=x;% 2nd vector
Now I want to draw a peak of strenght 5 on the intersection of the point (x1,y1)=(30,50).Likewise, I want to draw another peak on the intersection of the point (x2,y2)=(40,120). Further, I want to draw another peak on the intersection of the point (x3,y3)=(60,140). But this whole plot should be a 3D plot as shown in the attached image. ##### 2 CommentsShowHide 1 older comment
Sadiq Akbar on 21 Feb 2022
Thank you for your response. There is no eq. but I want to draw peaks of my desired values. Say for example, one peak should be of height 5, another should be of height 5.5 and another should be of height 7.

Star Strider on 21 Feb 2022
[X,Y] = ndgrid(0:300);
C = 50:100:300;
Zf = @(C) exp(-(((X-C).^2)*0.5+((Y-C).^2)));
Z = Zf(C(1)) + Zf(C(2)) + Zf(C(3));
[pks,locs] = findpeaks(Z(:), 'MinPeakHeight',0.5)
pks = 3×1
1 1 1
locs = 3×1
15101 45301 75501
figure
surf(X, Y, Z, 'EdgeColor','none')
hold on
plot3(X(locs), Y(locs), Z(locs), '^r')
hold off Experiment with your data with this approach.
.
Star Strider on 2 Mar 2022
As always, my pleasure!