Make the x and y coordinates then enter the value into those coordinates

I have:

value (a) matrix (20 rows x30 columns)

value (b) matrix (30 rows x 1 column)

value X = 20

value y = 30

I want to make the x (horizontal) and y (vertical) coordinates according to the x and y values (20 rows and 30 columns), then I will enter the (a) matrix values (20 rows x 30 columns) into the x and y coordinates

For example, the coordinates are 3 rows x 2 columns and then the value (a) of the matrix will be entered according to the coordinates, 3 rows x 2 columns.

[Jan]

What does "enter the a matrix" mean? You can simply create it as m-file or do you mean the input command?

[Muhamad Arung]

Okay sir, so what I did first I had to make the x and y coordinates with a value of 20 rows x 30 columns, then when the coordinates were ready it would randomize the numbers from the x and y coordinate matrices for example 2x3 and I would enter the value from the value a matrix (20 rows x 30 columns), according to the random number. the image below is an example of a matrix a (20 rows x 30 columns)

[Jan]

"I had to make the x and y coordinates with a value of 20 rows x 30 columns" - is this solved or part of the question? I'm not sure, what this means. Maybe:

x = 1:20;
y = 1:30;

% Or perhaps:
[X, Y] = mesgrid(x, y);

I cannot guess, what this means: "it would randomize the numbers from the x and y coordinate matrices for example 2x3".

What does the screenshot explain?