USING FOR LOOP TO PLOT SEVERAL LINES

L=[4:2:20];

%X coordintates for reflaction point x3=L/2;

%Y coordinates for reflection point IS -5

%X coordinate for rays coming back to the surface (y=0 line) is L and all y is 0

First there are rays that goes from point (0,0) to evrey point on the line y=-5 with L/2 as x coordinates and then from these points rays goes back to the line y=0 with L as x coordinate

 I did this
X=[0  2  0   3   0  4  0   5   0  6  0   7   0  8  0   9  0  10;2  4  3   6   4  8   5  10  6  12  7   14  8   16  8  18  10  20];
Y=[0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 ;-5  0  -5   0  -5  0  -5  0 -5  0  -5   0 -5  0 -5  0  -5  0] ;
plot(X,Y)
title('Ray over a halfspace')

I have plotetd this using matrix but I am required to plot it using for loop command which I cant here !! could anyone thankfully help me out?

[KL]

How should your output look like?

Answer 1

[KL]

something like this?

 plot(X(:),Y(:))

[F.O]

X=[0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10;2 4 3 6 4 8 5 10 6 12 7 14 8 16 8 18 10 20];

 Y=[0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 ;-5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0 -5 0] ;

 plot(X,Y)

[F.O]

This is how it looks like

[KL]

hold on
for k = 1:size(X,2)
   plot(X(:,k),Y(:,k));
end

[F.O]

L=[4:2:20];

%X coordintates for reflaction point x3=L/2; %Y coordinates for reflection point IS -5

%X coordinate for rays coming back to the surface (y=0 line) is L and all y are 0 here

First there are rays that goes from point (0,0) to evrey point on the line y=-5 with L/2 as x coordinates and then from these points rays goes back to the line y=0 with L as x coordinate

We shouldn't be using the matrix i written in the original question because that was not what required from me . anyway the script you wrote is giving a warning message (Warning: The figure is too large for the page and will be cut off. Resize the figure, adjust the output size by setting the figure's PaperPosition property, use the 'print' command with either the '-bestfit' or '-fillpage' options, or use the 'Best fit' or 'Fill page' options on the 'Print Preview' window. )