MATLAB: How to draw multiple lines

line

Hi all, how to draw multiple lines that have (start point (0,0) with different angles 0:5:90 degrees)?? any suggestions for code??

Best Answer

Try this:

deg = 0 : 5 : 90;
r = 1;
x = r*[zeros(size(deg(:))) cosd(deg(:))];
y = r*[zeros(size(deg(:))) sind(deg(:))];
figure
plot(x', y', 'LineWidth',2)
axis equal

Here, ‘r’ (the radius value) defines the end points for each line. If you want different lengths for each line, ‘r’ becomes a (19x1) vector with a different value assigned to each element.

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clc; clear all ;
%%PLOT lines
deg = 0 : 5 : 90;
r=2;
x_ax = r*[zeros(size(deg(:))) cosd(deg(:))];
y_ax = r*[zeros(size(deg(:))) sind(deg(:))];
plot(x_ax', y_ax', 'LineWidth',1)
hold on 
%%Plot square
x1=0;
x2=1;
y1=0;
y2=1;
x = [x1, x2, x2, x1, x1];
y = [y1, y1, y2, y2, y1];
plot(x, y, 'b-', 'LineWidth', 2.5);
grid on
grid minor 
axis equal
xlim([-0.2,1.2])
ylim([-0.2,1.2])  
%%Get points lying inisde square 
figure
hold on
plot(x, y, 'b-', 'LineWidth', 2.5);
grid on
grid minor 
axis equal
xlim([-0.2,1.2])
ylim([-0.2,1.2])  
t = linspace(0,1,1000)' ;
for i = 1:size(x_ax,1)
    xi = (1-t)*x_ax(i,1)+t*x_ax(i,2) ; 
    yi = (1-t)*y_ax(i,1)+t*y_ax(i,2) ; 
    %
    idx = inpolygon(xi, yi,x', y') ;
    plot(xi(idx), yi(idx))
end

Best Answer

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