Centered coordinate axes in 2D plots

Takes the current coordinate axes (with ticks and labels) and draws new ones centered at the origin.

Description

MATLAB does not have any built-in functionality for centering the coordinate axes around the origin. This tool is a first fix for solving this. An example script is included showing how to use the function.

Tested on MATLAB 2007b. Works fine, as long as the figure is not resized after the function is called.

• MATLAB release: MATLAB 7.5 (R2007b)
• Other Files: centeraxes.m, ; centeraxes_test.m

[John Hughes]

Pretty decent. Doesn't work in cases where you have multiple axes, as you sometimes get with

plot(foo)
hold on
plot(bar)
plot(baz)
hold off

But otherwise, it works pretty darned well. One suggested improvement: allow an option for what "center" to use, so that I could have x- and y-axes intersecting at (-1, 2), if I so chose.

[Johan Carlson]

Thank you John!

The option of where to put the center is a simple fix, and I'll definitely deal with that. The other issue is more serious, and unfortunately slightly harder to solve. Nevertheless, I'll give it a go.

Another limitation at the moment is that the tick marks and arrowheads tend to scale if the image is resized after the call to centeraxes.

Anyway, thanks for the feedback.

/Johan

[Mario Liverpool]

Thank u Johan, I downloaded "centeraxes", it solved my problem.
How do I get the axes ticked from -1 to 1 please? now it's ticked only from -0.9 to 0.9.
Thanks again
Mario

[Johan Carlson]

Mario,
I deliberately removed the end tick labels in on the axes, simply because I didn't think it looked so good. It appeared that changing this takes a bit of fixing of the code to make the arrowheads appear in the right place. Anyway, I'm on it, and I'll post a new version in a couple of days.

/JC