my question is what is wrong with my code, the results should be in the first picture not the second.

Question

jana nassereddine 2021-9-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1462659-my-question-is-what-is-wrong-with-my-code-the-results-should-be-in-the-first-picture-not-the-secon

评论： David Goodmanson 2021-9-30

采纳的回答： David Goodmanson

D=zeros(6);

for row=1:6

for col=1:6

if col>row %upper right corner

D(row,col)=0

else if col==row %diagonal

D(row,col)=0

else if row>col % bottom left corner

if mod(row,2) ==0 && col==1

D(row,1)= row-1

if mod(row,2)==0 && mod(col,2) ==1 && col>=3

D(row,col)= (row-1)*2

if mod(row,2) ==1 && mod(col,2) ==0

D(row,col)= (row-1)*2

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

David Goodmanson 2021-9-30

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1462659-my-question-is-what-is-wrong-with-my-code-the-results-should-be-in-the-first-picture-not-the-secon#answer_798934

编辑：David Goodmanson 2021-9-30

在 MATLAB Online 中打开

Hi jana,

the problem is that the if statements

if mod(row,2)==0 && mod(col,2) ==1   && col>=3             % (b)   
and    
if mod(row,2) ==1 && mod(col,2) ==0                        % (c)

are contained within

if mod(row,2) ==0 && col==1                                % (a)  
  .......
  .......  
end

and their conditions conflict with (a) so they never are implemented. If for both (b) and (c) you change 'if' to 'elseif' and then get rid of two suddenly extraneous end statements at the end, it works.

2 个评论
显示无隐藏无

jana nassereddine 2021-9-30

hey, I just solved an hour ago

D=zeros(50);

for row=1:51

for col=1:51

if col>row %upper right corner

D(row,col)=0

else if col==row %diagonal

D(row,col)=0

end

if row>col % bottom left corner

if mod(row,2) ==0 && col==1

D(row,1)= row-1

end

if mod(row,2)==0 && mod(col,2) ==1 && col>2

D(row,col)= (row-1)*2

end

if mod(row,2) ==1 && mod(col,2) ==0

D(row,col)= (row-1)*2

end

David Goodmanson 2021-9-30

Hi jana, I forgot to mention that there is no need to do the for loops that set the upper right corner to zero, since your preallocation of D made them zero already.

请先登录，再进行评论。