how can i split matrix into two part?

Question

sharifah shuthairah syed abdullah 2019-1-12

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https://ww2.mathworks.cn/matlabcentral/answers/439449-how-can-i-split-matrix-into-two-part

评论： Rounak Saha Niloy 2022-10-19

i have this matrix

PP =
   8     2    10     1     4     6     5     9     7    12     3
   3     5     7     6     9    11     1     2     8    12    10
  11     9    10    12     2     6     5     8     1     7     3
   9     2     7     6     8    11    12     1     4    10     5
     

i want to split this matrix into to part

so code like this

v=2
p1=[PP(1:v,:)];
p2=[PP(PP-v+1:end,:)];

v=2 means that i want to split into two row..

the 1st and 2nd row is in p1, and the 3rd and 4th in p2..

for p1 i got the code correctly however for p2 i didnt get it right

i put v because if the matrix change to 6x6 or 10x10 , i want to change the value of v into what ever i want..

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ACHAMMA JACOB 2019-2-7

hello sir,

actually i am having a matrix 201x301. I need to spli it into 2 rows and N columns. how is it possible sir?

Shafiqur Rahman 2020-10-16

simply

pp=(5 row,5 clm)

p1=pp(1:2,:);

p2=pp(3:end,:)

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Answer 1

Stephen23 2019-1-12

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https://ww2.mathworks.cn/matlabcentral/answers/439449-how-can-i-split-matrix-into-two-part#answer_356112

编辑：Stephen23 2019-1-12

p1 = PP(1:v,:);
p2 = PP(v+1:end,:);

Note that I got rid of the superfluous square brackets.

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sharifah shuthairah syed abdullah 2019-1-12

thank you so much.. i have been stuck several week on this part.. thank you so much..

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Answer 2

madhan ravi 2019-1-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/439449-how-can-i-split-matrix-into-two-part#answer_356110

编辑：madhan ravi 2019-1-12

在 MATLAB Online 中打开

Don’t think of naming variables dynamically ( https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval#answer_274740 )

v=2;
P=reshape(PP,v,size(PP,2),[])

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sharifah shuthairah syed abdullah 2019-1-12

在 MATLAB Online 中打开

i try using the code u give.. the result show that its change the value inside the matrix..

for example

PP =
   5     6     3    10     7     1     2     4     9     8    12
  10     1     2     8    12     3     5     6     7    11     9
   3     5    10    12     1     2     7     9     4    11     8
   1    10     8     2     5     4     6    11     9     7     3    

the result

    P=reshape(PP,v,size(PP,2),[])
P(:,:,1) =
    11     6     5     3     6     5     3    10    10    12     7     1
     4    12    10     1     1    10     2     8     8     2    12     5
P(:,:,2) =
     1     2     2     7     4     9     9     4     8    11    12     8
     3     4     5     6     6    11     7     9    11     7     9     3