Im lost sum1 help me with the code, im new to this Matlab programming

Write a script that requests two positive integers greater than 3 (with error checking). The
numbers represent the x- and y-dimensions of a rectangle. Your program should then display a
rectangle of asterisks (*) with the specified dimensions. The rectangle with dimensions x = 5
and y = 4 would be displayed as :
*****
* *
* *
*****

Answer 1

[sixwwwwww]

Dear Merapelo, you can do it like this:

width = input('Enter width of rectangle (value should be positive and greater than 3): ');
if ~isnumeric(width)
    error('Value for width is not a valid number')
elseif width < 4
    error('Width is less than 3')
end
height = input('Enter height of rectangle (value should be positive and greater than 3): ');
if ~isnumeric(height)
    error('Value for height is not a valid number')
elseif height < 4
    error('Height is less than 3')
end
NumberOfAsteriksInEachDirection = 100;
x = [zeros(1, NumberOfAsteriksInEachDirection), linspace(0, width, NumberOfAsteriksInEachDirection), linspace(0, width, NumberOfAsteriksInEachDirection),...
    ones(1, NumberOfAsteriksInEachDirection) * width];
y = [linspace(0, height, NumberOfAsteriksInEachDirection), zeros(1, NumberOfAsteriksInEachDirection), ones(1, NumberOfAsteriksInEachDirection) * height,...
    linspace(0, height, NumberOfAsteriksInEachDirection)];
plot(x, y, '*'), xlim([-1 width+1]), ylim([-1 height+1])

I hope it helps. Good luck!