How do I change plot line widths?

I'm trying to plot two arrays of values and change the width of the resulting line, however I can't seem to get it to work. I've tried several approaches and nothing seems to be yielding any results.

 plot(X_a,Y_a,'LineWidth',10);

[Star Strider]

The obvious question is:

• What are ‘X_a’ and ‘Y_a’,(vectors, matrices, something else?) and
• What is the context of the code you are plotting them in?

This works when I plot it

X_a = 1:10
Y_a = sin(2*pi*X_a/10)

figure
plot(X_a, Y_a,'LineWidth',10)

figure
plot(X_a', Y_a','LineWidth',10)

so you are obviously not telling us some important information.

[Benjamin Haag]

X_a and Y_a are initialized as matrices. This is part of a function that reads in a given equation to plot based on starting and stopping X values as well as a given step size for X with which to caluclate Y. X_a and Y_a are the storage arrays for plotting the values of X and Y at the end of the for loop calucations. Probably not the best way of going about it, but I digress.

[Adam Danz]

Could you share a screen shot of the results of the line below?

 plot(X_a,Y_a,'LineWidth',10);

Something's probably off with your input variables. Here's an example of input matricies that procude lines and a functioning width parameter.

X_a = rand(4,4); 
Y_a = rand(4,4); 
plot(X_a, Y_a, 'LineWidth', 4)

[Image Analyst]

Do you have the plot() inside a loop where you are plotting just one single point, instead of AFTER the loop where you are plotting a bunch of values at once?

You should also specify the line style, like

plot(X_a, Y_a, 'b*-', 'LineWidth', 10); % Plot blue line with asterisk markers

to make sure you're plotting a line rather than just markers.

[Benjamin Haag]

Got it working, for some reason my function wasn't updating when I called it to check my work. All set now. Thanks!

[Adam Danz]

If the m-file containing your function is stored on a remote driver or server, sometimes you need to rehash the path after making changes to the m file before those changes take effect.

rehash path

Answer 1

[Aik-Siong Koh]

See comments for answer.