Problem with filling a variable inside loops

Question

Hamid 2022-8-5

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1774430-problem-with-filling-a-variable-inside-loops

评论： Hamid 2022-8-10

采纳的回答： VBBV

pnts.txt

在 MATLAB Online 中打开

Dear experts,

I have 3 loops as shown in the code and want to find elements of t_p but the hmd variable is empty and not filling correctly.

When I use commad window and for example set (i=10,j=10,k=10) the command works and the desired values are obtained.

The purpose of my code is to find the values for t_p that are within a specefic x,y,z range.

Many Thanks in advance.

p = readtable ('pnts.txt');
p = table2array(p);
x_p=p(:,2);
y_p=p(:,3);
z_p=p(:,4);
t_p=p(:,5); 
xedges=-100:10:100;
yedges=-100:10:100;
zedges=0:10:200;
for i = 1:length(xedges)-1
    for j = 1:length(yedges)-1
        for k = 1:length(zedges)-1
           hmd = t_p((xedges(i)<= x_p) & (x_p < xedges(i+1)) & ((yedges(j)<= y_p) & (y_p < yedges(j+1))) & ((zedges(k)<= z_p) & (z_p < zedges(k+1))));
        end
    end
    
end

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

VBBV 2022-8-6

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1774430-problem-with-filling-a-variable-inside-loops#answer_1022035

编辑：VBBV 2022-8-6

在 MATLAB Online 中打开

pnts.txt

p = readtable ('pnts.txt');
p = table2array(p);
x_p=p(:,2);
y_p=p(:,3);
z_p=p(:,4);
t_p=p(:,5); 
xedges=-100:10:100;
yedges=-100:10:100;
zedges=0:10:200;
for i = 1:length(xedges)-1
    for j = 1:length(yedges)-1
        for k = 1:length(zedges)-1
           hmd = t_p((xedges(i)>= x_p) & (x_p <= xedges(i+1)) & ((yedges(j)>= y_p) & (y_p <= yedges(j+1))) & ((zedges(k)>= z_p & (z_p) <= zedges(k+1))));
        end
    end
    
end
hmd
hmd = 6109×1
    0.1449
    0.0674
    2.0756
    0.0145
    0.0492
    0.0313
    0.6017
    0.0109
    0.0477
    0.0680