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

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댓글: Star Strider 2022년 3월 2일
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. ##### 댓글 수: 2표시숨기기 이전 댓글 수: 1
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.

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### 채택된 답변

Star Strider 2022년 2월 21일
[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.
.
##### 댓글 수: 8표시숨기기 이전 댓글 수: 7
Star Strider 2022년 3월 2일
As always, my pleasure!

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