How to create a matrix with nested for loop for fraction entries?

Question

Tanya Sharma 2021-9-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1462299-how-to-create-a-matrix-with-nested-for-loop-for-fraction-entries

评论： Mathieu NOE 2021-9-28

采纳的回答： Mathieu NOE

在 MATLAB Online 中打开

I want to create a matrix where x and g has values given as ii and jj.

The code runs fine but I want a 3 by 3 matrix as an output.

How to correct the code?

clear;
clc;
ii=0.5:.1:.7;
jj=.4:.1:.6;
mat=zeros(length(ii),length(jj));
mm=1;
for x=ii               
    kk=1;              
    for g=jj           
y=1;
f=x*y*g;               
mat(kk,mm)=f            
kk=kk+1;              
 mm=mm+1;
    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

Mathieu NOE 2021-9-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1462299-how-to-create-a-matrix-with-nested-for-loop-for-fraction-entries#answer_796844

在 MATLAB Online 中打开

hello

here are a few mods to get a correct 3 x 3 output

clear;
clc;
ii=0.5:.1:.7;
jj=.4:.1:.6;
mat=zeros(length(ii),length(jj));
kk=1;
for x=ii     
    mm=1;
    for g=jj           
        y=1;
        f=x*y*g;               
        mat(kk,mm) = f ;           
        mm=mm+1;
    end
    kk=kk+1;
end

2 个评论
显示无隐藏无

Tanya Sharma 2021-9-28

Thanks a lot Mathieu. Helped me perfectly.

Mathieu NOE 2021-9-28

My pleasure

Have to admit @Rik 's suggestion is very valuable too.

请先登录，再进行评论。

Answer 2

Rik 2021-9-28

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1462299-how-to-create-a-matrix-with-nested-for-loop-for-fraction-entries#answer_796849

在 MATLAB Online 中打开

Why use loops at all?

y=1;
ii=0.5:.1:.7;
jj=.4:.1:.6;
[ii,jj]=ndgrid(ii,jj);
mat=ii.*y.*jj;
disp(mat)
    0.2000    0.2500    0.3000
    0.2400    0.3000    0.3600
    0.2800    0.3500    0.4200