PlotAxisAtOrigin

Posted by Robert Bemis, February 6, 2009

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Bob's pick this week is PlotAxisAtOrigin by Shanrong Zhang.

As an application engineer I showed MATLAB to a lot of people. Occasionally when I presented graphics capabilities someone would ask how to make plots where the X and Y axes lines go through the origin. You know: the way we learned to draw them in school. By default MATLAB puts the X axes on bottom and the Y axes on the left.

x = -2*pi:pi/10:2*pi;
y = sin(x);
plot(x,y)

While the xAxisLocation can be set to top, and the yAxisLocation can be right, neither has an origin option for example. So, instead, I usually suggested drawing lines through the origin. In fact, prior "Pick of the Week" star Brandon Kuczenski made that trivial with hline and vline.