MATLAB: How to plot a diagonal line on a log-log scale plot

linearloglogloglogspaceMATLAB

I have a "loglog" plot of data and I want to plot a diagonal line from corner to corner. How can I do this?

Best Answer

The most straight forward way to do this is to "loglog" plot a "logspace" array across the bounds that you are working with. For example:
x = logspace(0,15);
scatter(x,x)
grid on
hold on
loglog(x,x)
hold off
Alternatively, you can call "plot" with a "linspace" array as both the "x" and "y" arguments.
x = logspace(0,15);
scatter(x,x)
grid on
hold on
y = linspace(1,1e15);
plot(y,y)
hold off
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