MATLAB: How to plot a smooth color wheel

colorcolor wheelmapplot

How to plot a smooth color wheel, like this?

See my demo. Adapt as needed.

colormap is a function and you just blew it away with this line of code:

colormap = jet(256);

That overwrote the colormap function (luckily not permanently) with a 256-by-3 double array.

Try it this way

colormap(jet(256));

The ability to make the datatip disappear while using the mouse scroll wheel is not available in MATLAB.

The only workaround is to move the mouse away before using the scroll wheel.