How do i create the following cell array ?

this is what I have in mind :

as you can see, the main matrix is 2*4, and within each cell there are 3 values

Question 1 :how do I create this ?

Question 2 if I want to access one of the cells( accessing all 3 values as a vector), corresponding to row r and column c , how can I do so ?

Quesiton 3 if I want to access the 2nd element of the 3rd top cells from the left ( here it would be 6 ), how can I do so ?

Answer 1

[Stephen23]

Q1.

C = {[2,3,1],[1,5,6],[4,6,5],[3,1,7];[3,5,7],[2,4,6],[2,6,3],[8,2,3]}

Q2.

C{r,c} % access the cell contents (i.e. the numeric array)
C(r,c) % access the cell itself

Q3.

C{1,3}(2)

You should also read the MATLAB documentation:

https://www.mathworks.com/help/matlab/matlab_prog/create-a-cell-array.html

https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-cell-array.html

[Abbi Hashem]

thank you !

What if I wanted to build those dimensions initially , where all values are zeros ?

[Stephen23]

"What if I wanted to build those dimensions initially , where all values are zeros ? "

Your question is not very clear, but I think you mean this:

C = repmat({[0,0,0]},2,4)

or

C = cell(2,4);
C(:) = {[0,0,0]}

Note that for container types (e.g. cell arrays) it is often not required to preallocated the contents of the cells (unless they might be changing size in a loop, or similar):

https://www.mathworks.com/help/matlab/matlab_prog/preallocate-memory-for-a-cell-array.html

https://www.mathworks.com/matlabcentral/answers/394630-preallocating-cell-array-concent

[Abbi Hashem]

yup exactly what I meant

Thank you so much !