Hi. I am a complete novice at matlab and have been asked to create a 10x10 matrix in as few steps as possible. The first row has to be from 1:10, the second line from 2:11 and so on. How can I create this using repmat?

Question

Sam Thorpe 2019-2-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446300-hi-i-am-a-complete-novice-at-matlab-and-have-been-asked-to-create-a-10x10-matrix-in-as-few-steps-as

评论： Sam Thorpe 2019-2-22

%this is the matrix I want to achieve
A = zeros(10)
A(1,:)=[1:10]
A(2,:)=[2:11]
A(3,:)=[3:12]
A(4,:)=[4:13]
A(5,:)=[5:14]
A(6,:)=[6:15]
A(7,:)=[7:16]
A(8,:)=[8:17]
A(9,:)=[9:18]
A(10,:)=[10:19]
%How can I achieve this using repmat, reshape or meshgrid and the colon
%operator?

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Stephen23 2019-2-22

"How can I achieve this using repmat, reshape or meshgrid and the colon operator?"

Are those really the only operators you are allowed to use?

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Fangjun Jiang 2019-2-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446300-hi-i-am-a-complete-novice-at-matlab-and-have-been-asked-to-create-a-10x10-matrix-in-as-few-steps-as#answer_362125

在 MATLAB Online 中打开

(1:10)+(0:9)'

2 个评论
显示无隐藏无

Sam Thorpe 2019-2-21

Thanks Fanjung, but is there any way of doing this using the functions which I specified?

Fangjun Jiang 2019-2-22

在 MATLAB Online 中打开

It implies

repmat(1:10,10,1)+repmat((0:9)',1,10)

请先登录，再进行评论。

Answer 2

Stephen23 2019-2-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446300-hi-i-am-a-complete-novice-at-matlab-and-have-been-asked-to-create-a-10x10-matrix-in-as-few-steps-as#answer_362198

在 MATLAB Online 中打开

This uses meshgrid and plus as well (not sure if that is allowed):

>> [X,Y] = meshgrid(0:9,1:10);
>> X+Y
ans =
  2    3    4    5    6    7    8    9   10
  3    4    5    6    7    8    9   10   11
  4    5    6    7    8    9   10   11   12
  5    6    7    8    9   10   11   12   13
  6    7    8    9   10   11   12   13   14
  7    8    9   10   11   12   13   14   15
  8    9   10   11   12   13   14   15   16
  9   10   11   12   13   14   15   16   17
 10   11   12   13   14   15   16   17   18
 11   12   13   14   15   16   17   18   19

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。

Answer 3

madhan ravi 2019-2-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446300-hi-i-am-a-complete-novice-at-matlab-and-have-been-asked-to-create-a-10x10-matrix-in-as-few-steps-as#answer_362203

在 MATLAB Online 中打开

Honestly Fangjun Jiang's answer is the way I would do it but according to your question "How can I create this using repmat?" Which I think is a complete waste of time.

repmat(1:10,numel(1:10),1)+repmat((0:9).',1,numel(0:9))

3 个评论
显示 1更早的评论隐藏 1更早的评论

madhan ravi 2019-2-22

True we should wait:

Another possibilty:

(0:9).' can be replaced with reshape(0:9,1,[])

Sam Thorpe 2019-2-22

Thank you all very much for your help. It is part of a task for a course which is terrible at teaching us the basics of using the software. The use of plus is allowed. It just asks us to use one of the three functions I specified and the colon operator but gave us no method of using them.

请先登录，再进行评论。