An NxNxN matrix code

How do I code for NxNxN matrix using a letter.

Answer 1

[KSSV]

text(0.5,0.5,'D','FontSize',90,'Color','k')
axis off
I=frame2im(getframe(gcf));

iwant = imresize(I,[50 50]) ;
imshow(iwant)

[dunphy]

I=frame2im(getframe(gcf));

what does this one does?

[KSSV]

That will convert the plot into image

[dunphy]

text(0.5,0.5,'D','FontSize',90,'Color','k')

what are these for?

[Spaceman]

text adds text to one point, specifying x and y as scalars. i.e. (0.5,0.5)

'D' is what appears in the image.

'Fontsize',90 specifies how large the D will be.

'Color','k' dictates the D will be black.