determine elements belonging to the same group and change coordinates

clc
clear all
M = dlmread('C:\Users\wexample_case2.txt','\t',1);%%change path 
element = M(:,1);
xs = M(:,2);
xe = M(:,3);
ys = M(:,4);
ye = M(:,5);
zs = M(:,6);
ze = M(:,7);

%% 
for i=1:length(element-1)
    if xe(i)==xs(i+1) && ye(i)==ys(i+1)
        xs(i+1)=xs(i);
        ys(i+1)=ys(i);
        xe(i)=xs(i);
        ye(i)=ys(i);
        xs1=xs;
    elseif xs(i)==xe(i-1) && ys(i)==ye(i-1)
        xe(i)=xs(i-1)
        ye(i)=ys(i-1)
    else
        xe(i)=xs(i)
    end
end

Answer 1

[darova]

Just loop through elements

clc,clear

A = load('wexample_case2.txt');
x = A(:,2:3);
y = A(:,4:5);
z = A(:,6:7);

for i = 1:3:size(x,1)
    j = (0:2) + i;
    x(j,:) = x(i,1);
    y(j,:) = y(i,1);
end
plot3(x',y',z','.-r')

xlim([0 7])
ylim([0 6])

[Ana Bermejo Jimenez]

Hi Darova,

Thank you for your answer. It works but only if the elements are in order as I gave them to you. How would this be if the elements were scattered as in the file attached?

Thanks in advance.

Ana.

[Ana Bermejo Jimenez]

It is the same numbers but I switched a couple of rows so the elements are not in order

element n xstart xend ystart yend zstart zend

1 1 1 1 1 0 1

2 1 1 1 1 1 2

3 1 1 1 1 2 3

4 6.5 6.75 1 1 2 3

5 2 2 1.25 1.5 1 2

6 2 2 1.5 1.75 2 3

7 3 3.25 1 1 0 1

8 3.25 3.5 1 1 1 2

9 1 1 5 5 2 3

10 1 1 5 5 0 1

11 1 1 5 5 1 2

12 3.5 3.75 1 1 2 3

13 2 2 5 5 0 1

14 2 2 5 5 1 2

15 2 2 5 5 2 3

16 3 3.25 5 5 0 1

17 3.25 3.5 5 5 1 2

18 3.5 3.75 5 5 2 3

19 6 6.25 1 1 0 1

20 6.25 6.5 1 1 1 2

21 2 2 1 1.25 0 1

[darova]

I saw, sorry for misunderstanding

Try this

[Ana Bermejo Jimenez]

It works perfectly, thank you so much! You are a diamond!

One last question. If I wanted to use the x y coordinates of a given z level should I just change

ind = find(zs<min(zs)+0.1)

for something like

for i=1:length(zs)
[ind(i,1) p1(i,1)]= min(abs(selected_z_value-zs(i,1)))
end

[darova]

You pick some z level and a pile should be straightened to (x,y)? You mean this?

[Ana Bermejo Jimenez]

Yes that's correct. I was trying to pick a level defined by an element zstart or zend. But ideally would be a random level.

[darova]

Are piles always straight?

[Ana Bermejo Jimenez]

Yes they are.

[darova]

Current script for piles that are always straight

[Ana Bermejo Jimenez]

it works fine thank you!