Draw a straight line from the center (0,0) 25 degrees in the coordinate system

I don't have any experience in Matlab but I need to measure distances for a simulation. I ask for your support. From the center of the coordinate system (0,0) I have to draw a straight line that is 4m long as an orientation. Then a straight line from the left side that starts at the point (-1.0), 25 degrees from the center line and ends at the end of the 4m straight. So also from the right side a straight line with the beginning (1.0) and also ends at 4m.

I have to move the starting points (-1.0) and (1.0) after each measurement of the distance of the line from its starting points for the next measurement. For example: the next starting points of the two lines from the left and right start at (-2.0) and (2.0).

I have an example in the appendix.

And then, finally, for each angle from 0 degrees to 25 degrees from the center (0.0), perform the displacements on the X-axis. For example, starting with (-1.0) and (1.0) to (-5.0) and (5.0) I will upload example in the attachment.

Thank you in advance!

Answer 1

[Harald]

Hi,

I suppose you are fine calculating start and end points of each line?

plot([x1, x2], [y1, y2])

will draw a line from (x1, y1) to (x2, y2). When using multiple plot commands, make appropriate use of the hold command.

To familiarize yourself with MATLAB, consider taking the free MATLAB Onramp.

Best wishes,

Harald

[Saud]

Thank you for the feedback. How to draw a line at a certain angle from the zero point?

[Harald]

Hi,

in my suggestion, use

x1 = 0;
y1 = 0;
x2 = cosd(theta) * d;
y2 = sind(theta) * d;

If different scaling is used on the axes, the angle may look incorrect. To prevent that, use

axis equal

Best wishes,

Harald