Building a matrix inside a for loop

Question

faiber vargas 2021-5-3

0
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https://ww2.mathworks.cn/matlabcentral/answers/820730-building-a-matrix-inside-a-for-loop

评论： Cris LaPierre 2021-5-7

Hello guys I am new programming on matlab and I was trying to build a matrix using a for cycle but I could´t .

I made this code:

clc 
clear 
syms x
P=5
for i=1:0.5:P
    for j=1:0.5:P
        x=[ i j;]
    end
 end

but that code doesn't build a matrix, the matrix that a need is like this :

X = [-1.5 3.2; 1.8 3.3; -3.7 1.5; -1.5 1.3;

0.8 1.2; 3.3 1.5; -2 -1.0;-2.3 -0.7;

0 -0.5; 2.0 -1.5; 3.7 -0.8; -3.5 -2.9;

-0.9 -3; 2.0 -3; 3.5 -2.25]

it's a matrix of points or coodinates, that will be used to make a voronoi diagram but we want to make the points with a matrix due the numbers of pints varie between 50 and 1000 and it will be longer if I write it and also uneffiecient.

So how I have to write the for cycle to build that matrix with the coordinates of the points? as I need.

I would appreciate your help

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David Hill 2021-5-3

I have no idea based on your code on how you expect to get your desired output. What is the relationship between 1:.5:5 and your output?

faiber vargas 2021-5-3

I want a point every 0.5 until 20 or 100, and that is because we want to represent a micrography with voronoi diagram that will be create with those points in the matrix . so we represents the micrography with the voronoi diagram and later we simulate its behavior.

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