On 2/2/2012 3:41 PM, Benjamin Root wrote:
On Wed, Feb 1, 2012 at 4:07 PM, Jim St.Cyr <jim.st...@gmail.com
<mailto:jim.st...@gmail.com>> wrote:
Hello-
Scenario:
Basemap used to display the East Coast of the US and the Atlantic Ocean.
Shapelib is used read a shapefile the contents of is pumped into a PyPlot
subplot hosted Line Collection which overlays the ocean with a grid
PyPlot text is used to label each grid with it's designator.
What I want to do is plot a collection of points, save the result as a PNG,
clear the first set of points, plot another collection of points, save the
result, and so on. The problem is the if I use the Pyplot clf function it
wipes
everything previously built.
What do I need to do in order to clear just the points without clearing
everything?
Thank you.
Jim
Jim,
Sorry for the delay. Most plotting functions in matplotlib returns a
Collection object. These objects have a member function "remove()".
>>> import matplotlib.pyplot as plt
>>> plt.ion()
>>> plt.plot([0, 1, 2, 3, 4], [4, 3, 2, 1, 0])
>>> pts = plt.scatter([1, 2, 3], [1, 2, 3])
>>> plt.show() # You see three points and a line
>>> res.remove()
>>> plt.show() # Now you see only the line
I hope that helps!
Ben Root
Ben-
Very helpful. A question, how do you determine the object designator? In your
example above, res.remove(), where did the 'res' come from?
Jim
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