create coordination matrix from zig zag path

2020 7 14
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更新时间：2020 7 14
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I want to creat matrix with x and y coordiantion of zig zag path.
For example :
So the generated matrix should be like this:
A = [ o o
0 410
1 410
1 0
2 0
2 410
3 410
3 0
4 0
4 410
. ... ......]
let's say the x direction limit is 8 . How can we do this ?

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David Hill
David Hill 2020-7-14

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x=0:9;%xend odd only
y=[0;410;410;0];
A=[repelem(x',2),repmat(y,(x(end)+1)/2,1)];

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Islam Hassan
Islam Hassan 2020-7-14
Thanks a lot, but why the x limit can be only odd, is there nay way to make it odd or even?
David Hill
David Hill 2020-7-14
x=0:9;%xend odd only
y=[0;410;410;0];
A=[repelem(x',2),repmat(y,(x(end)+1)/2,1)];
A=A(1:2*(x(end)-1),:);%just eliminate last two rows for even
Islam Hassan
Islam Hassan 2020-7-14
The idea that I will link this code to another code, and I do not know whether the number will be odd or even. Thus, I want somthing to work without depending on the type of number (odd or even).
David Hill
David Hill 2020-7-14
x=0:9;
y=[0;410;410;0];
if mod(x(end),2)==1
A=[repelem(x',2),repmat(y,(x(end)+1)/2,1)];
else
X=[x,x(end)+1];
A=[repelem(X',2),repmat(y,(X(end)+1)/2,1)];
A=A(1:2*X(end),:);
end
Islam Hassan
Islam Hassan 2020-7-14
Sorry, I tried the below code you mentioned, however, it end with (9 0), however I want to end at (8 0).
So, for example if the x limit is 8 I want the generated matix to stop at ( 8 0), or if the x limit is 9, the matrix stop at (9 0)

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