2D matrix to 3D

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Chaodong Li 2019-6-5

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评论： madhan ravi 2019-6-5

Can anyone help me with making a 2D matrix into a 3D matrix?I have aI have a (616*780) 2d matrix and I need to make a 3D matrix of dimensions (616*780 x M) I need to take (616*780) consecutive matrices by row for layers,where M is the max value in the 2d matrix. Means I want to slice the 2D matrix.

I would appreciate it if anyone could help me! Thank you very much!

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Answer 1

KALYAN ACHARJYA 2019-6-5

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编辑：KALYAN ACHARJYA 2019-6-5

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Here I used the multidimetional arrays

mat1(:,:,1)=[1,2,3,4; 5,6,7,8; 9,10,11,12];
mat1(:,:,2)=[1,2,3,4; 5,6,7,8; 9,10,11,12];
mat1(:,:,3)=[1,2,3,4; 5,6,7,8; 9,10,11,12];
disp(mat1);

Result:

(:,:,1) =
   2     3     4
   6     7     8
  10    11    12
(:,:,2) =
   2     3     4
   6     7     8
  10    11    12
(:,:,3) =
   2     3     4
   6     7     8
  10    11    12

Check?

>> whos mat1
  Name      Size             Bytes  Class     Attributes
  mat1      3x4x3              288  double              
>> 

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Chaodong Li 2019-6-5

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Thank you very much.But my two dimensional matrices have different values.I'm actually representing terrain information in a two-dimensional matrix,evey value is elevation.Can i still use that notation?and how to write the code?

madhan ravi 2019-6-5

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Answer 2

madhan ravi 2019-6-5

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repmat(a,1,1,max(a(:))) % where a is your matrix if you have decimals in your matrix then use round function for max() to make the max value as an integer