MATLAB: 3 dimension array

Question

Hi, How to write 3 or 4 dimansion array?

Thanks, Henry

Answer 1

Any internet search engine will give these pages at the top of the search results:

http://www.mathworks.com/help/matlab/examples/manipulating-multidimensional-arrays.html

http://www.mathworks.com/help/matlab/math/multidimensional-arrays.html

http://www.mathworks.com/help/matlab/math/matrix-indexing.html

MATLAB's documentation is really useful and readable. It tells us how to use MATLAB. It has working examples too. You can search it using your favorite internet search engine: this will find the official, correct and recommended ways of using MATLAB. The first link above includes the title "Creating Multi-Dimensional Arrays" at the top of the page. Perhaps you might like to read this.

Here are three easy ways to create ND arrays:

• indexing:

>> A(:,:,2) = [1,2;3,4];
>> A(:,:,1) = [9,8;7,6]
A(:,:,1) =
     9     8
     7     6
A(:,:,2) =
     1     2
     3     4

• reshape:

>> X = [9,7,8,6,1,3,2,4];
>> reshape(X,2,2,2)
ans(:,:,1) =
     9     8
     7     6
ans(:,:,2) =
     1     2
     3     4

• cat:

>> X = [1,2;3,4];
>> Y = [9,8;7,6];
>> cat(3,Y,X)
ans(:,:,1) =
     9     8
     7     6
ans(:,:,2) =
     1     2
     3     4