I need to create letter K with 20 pixel by 20 pixel by plotting

Just start MatLab, I can plot the letter on 5x5 matrix but a 20x20 is to much

[KALYAN ACHARJYA]

Can you share more details?

[John Doe]

Hello, I figured out how to plot a letter using these scripts

n = 5; % size of matrix

x = [2 2 2 3 4 4 4 ]; % x-coordinate

y = [1 2 3 2 2 3 1 ] ; % y-coordinate

y_new = n - y; % upside down for y-coordinate

plot(x,y_new,'o','MarkerEdgeColor','b','MarkerFaceColor','b','MarkerSize',12), axis([0 n 0 n]), axis square, grid on;

Can you help me rotate this letter 90 degrees using transformation matrix.

Answer 1

[KALYAN ACHARJYA]

"Now I want to know how to rotate this letter 90 degrees"

n=5; % size of matrix
x=[2 2 2 3 4 4 4 ]; % x-coordinate 
y=[1 2 3 2 2 3 1 ] ; % y-coordinate 
y_new=n-y; % upside down for y-coordinate
figure,plot(x,y_new,'o','MarkerEdgeColor','b','MarkerFaceColor','b','MarkerSize',12), axis([0 n 0 n]), axis square, grid on; 
figure,plot(y_new,x,'o','MarkerEdgeColor','b','MarkerFaceColor','b','MarkerSize',12), axis([0 n 0 n]), axis square, grid on;

[John Doe]

Thank you for answering, but I forgot to add the using a transformation matrix part.

[KALYAN ACHARJYA]

Please do share more detail.

[John Doe]

I need to use some kind of linear transformation matrix to rotate the image.

[KALYAN ACHARJYA]

linear transformation? Please illustrate with example