How to save these values in a matrix

3 次查看（过去 30 天）
Ahmed Hassaan
Ahmed Hassaan 2012-2-28
hello , example : clc;clear all;close all; a=variable;b=variable2; for i=1:0.1:10 for j=1:0.1:10 ax=i-a; ay=j-b; z=[ax ay]; end end this is a very simple example but the point is i want to save all the results of ax and ay in the Z in the workspace as a matrix not the last value of ax and ay , Thanks for your help :)
  1 个评论
Honglei Chen
Honglei Chen 2012-2-28
Please format your question
http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Honglei Chen
Honglei Chen 2012-2-28
Use a for loop and preallocate z, i.e., add
z = zeros(91*91,2)
at front and then replace the assignment to z with
clc;clear all;close all; a=1;b=2;
z = zeros(91*91,2);
i = 1:0.1:10;
j = 1:0.1:10;
for m = 1:numel(i)
for n = 1:numel(j)
ax=i(m)-a;
ay=j(n)-b;
z((m-1)*numel(i)+n,:) = [ax ay];
end
end
  4 个评论
显示 2更早的评论
Ahmed Hassaan
Ahmed Hassaan 2012-2-28
thx for ur attention but it gives me the same error ,,anyway this is not the code im using its just an example ,
i just want to get z in the workspace as a table containing different values of variables in the for loop ,,
and this is the code :
close all;clear all;clc
r=1;L=3;N=3;RN=10;
k=-L/2:1.732*r:L/2;
A=mean(k);
for k=-L/2:1.732*r:L/2
ax=k-A;
ay=0;
r1=sqrt(3)*r/2;r2=(r/2);x=[ax ax+r1 ax+r1 ax ax-r1 ax-r1];y=[ay+r ay+r2 ay-r2 ay-r ay-r2 ay+r2];
fill(x,y,'g')
grid on ;
hold on
plot(ax,ay,'bo')
g=[ax ay]
end
I just want g to be contained the different values of ax & ay every loop ..
and thanks again :)
Honglei Chen
Honglei Chen 2012-2-28
It's because of the precision, you can either round it, or specify all possible i's and j's and then iterate the number of elements. See the updated example.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Function Creation 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by