Re: [Matplotlib-users] points in a scatter plot

[John H. <jdh...@ac...>]

>>>>> "Kuzminski," == Kuzminski, Stefan R <SKu...@fa...> writes:

    Stefan> Hi, I have a scatter plot, I need each data to
    Stefan> rendered as a single point ( or symbol ), rather than
    Stefan> a circle.  The axis are not the same, so the circles
    Stefan> are distorted in to ovals.  Maybe I should be using a
    Stefan> different plot?

This is a "feature" of scatter that has annoyed many people.  I'll see
if I can come up with something better.

To plot a dot, use

  plot(x, y, '.')    # draws a *very small* circle

or 

  plot(x, y, ',')   # draws a pixel

To plot circles (not ellipses) on axes with different scales, use

  plot(x, y, 'o')   # draws a circle

In the latter case you can set the marker size attribute in points

  plot(x, y, 'o', markersize=6)   # draws a circle with a 6 point radius

As long as you want the markers to be the same size and color, you
should use plot.  If you need either the size or color to vary, you
need scatter.  In which case I need to get the transform issue fixed
up sooner rather than later.

JDH