Adding a row and column is a matrix

12 次查看（过去 30 天）
Fatima Yusuf
Fatima Yusuf 2021-3-29
评论： William Rose 2021-3-30
I intializes a zero matrix [#bus,#bus] (name it z). And would like to increase a row and a column and do that in a for loop (name it zmod).
Moreover, the new row should be equal to the transposed of the new column.
How can I do this?

请先登录，再回答此问题。

回答（1 个）

William Rose
William Rose 2021-3-29
@Fatima Yusuf,
This code creates a square array of zeros. Then it adds a row and a column which are transpose of eachother, in a for loop, until it reaches the FinalSize.
%augmentArray.m
%WCRose 20210329
clear;
InitSize=3;
FinalSize=5;
z=zeros(InitSize);
zmod=z;
for i=InitSize:FinalSize-1
a=rand(i,1); %column to add
b=[a',rand(1)]; %row to add
zmod=[zmod,a;b];
end
disp(zmod)
Try it.
  4 个评论
显示 2更早的评论
Fatima Yusuf
Fatima Yusuf 2021-3-30
What if I added a row and col with zeros value and would like to change the last element of the matrix (final size,final size)
William Rose
William Rose 2021-3-30
@Fatima Yusuf,
Then you could change the for loop to the following:
for i=InitSize:FinalSize-1
a=zeros(i,1); %column to add
b=zeros(1,i+1); %row to add
zmod=[zmod,a;b];
end
or you could do
for i=InitSize:FinalSize-1
zmod=[zmod,zeros(i,1);zeros(1,i+1)];
end
If that is what you want to do, then the script above seems unnecessary. You could replace the whole script with the line
zmod=zeros(FinalSize);
which produces the same result as the for loop.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 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