Sum overlapping region using surf

Ricardo Duarte

2021 1 26

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Dear all,

I'm new in matlab and i'm doing some difficult stuff I guess...

I have 9 matrix (x1,y1,tl1, x2,y2,tl2 and x3,y3,tl3).

(x1,y1,tl1) correspond to the x and y coordinates of the transmission1

(x2,y2,tl2) correspond to the x and y coordinates of the transmission2

(x3,y3,tl3) correspond to the x and y coordinates of the transmission3

The dimension of x's is=20x19

The dimension of y's is=20x19

The dimension of tl's is=20x19

I'm plotting this three groups of matrixes using surf(x1,y,1,tl1) and surf(x2,y2,tl2) and surf(x3,y3,tl3) which gives me three overlapping circles.

First problem:

I need to sum the intersection/the overlapping region between these three plots

Second problem:

I will need to do the same for a n number circles (xn,yn,tln)

Thanks in advance for your help.

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Walter Roberson 2021-1-27

在 MATLAB Online 中打开

x_y_tl.mat

That's not a circle. Do you need the data to be projected into 2D and intersection done for that, or should intersection be done in 3D?

S = load('x_y_tl.mat')

S = struct with fields:

tl1: [20×19 double] tl2: [20×19 double] x1: [20×19 double] x2: [20×19 double] y1: [20×19 double] y2: [20×19 double]

surf(S.x1, 'edgecolor', 'none')

surf(S.y1, 'edgecolor', 'none')

surf(S.tl1, 'edgecolor', 'none')

surf(S.x1, S.y1, S.tl1, 'edgecolor', 'none')

Ricardo Duarte 2021-1-27

Hello Walter Roberson,

In fact the x and y are the matricis containing the coordinates and the tl contains de information regarding the transmission loss respecting that coordinates.

Taking into account the images you sent what I need is something like the last one (surf(x1,y1,tl1)). However, I want to sum the tl1 and tl2 in the region that they intersect in their x,y axes.

Thanks once again.

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