CODEWITHSUNDEEP
matplotlibmatplotlib-basemap
Lee Torres
Lee Torres

Reputation: 561

Matplotlib: Removing all artists and lines

Let's say I make a series of AnnotationBbox'es in matplotlib through a for loop, like this:

 for city in cities:
     x, y = self.map(city[1], city[0])

     ab = AnnotationBbox(imagebox, [x,y],
                                xybox=(0, 0),
                                xycoords='data',
                                boxcoords="offset points",
                                frameon=False)
            self.axes.add_artist(ab)
            self.locationImages.append(ab)

In this example, I've created a series of AnnotationBBoxes, and stored them in a list called self.locationImages. Then I go through the self.locationImages in a loop, and remove each one by doing this:

    for image in self.locationImages:
        image.remove()

Is there a way to remove all the artists, without having to go through a loop? Or to remove all artists, and lines completely, without having to remove the axes or the figure?

I'm plotting points on a map, and I need the map to stay. I'm doing zoom ins and outs, but during zoom ins and outs, I need to remove everything and replot. I'm working with a large data set and doing iterations is an expensive action

Upvotes: 3

Views: 5028

Answers (3)

ishandutta2007
ishandutta2007

Reputation: 18284

I had multiple add_artist earlier so removing just the 0th as suggested by @hayk didn't suffice for me . I did this:

if ax.artists and len(ax.artists) > 0:
    for a in ax.artists:
       a.remove()

Upvotes: 0

hayk
hayk

Reputation: 468

I believe a pretty nasty solution would be to do the following:

# remove all artists
while ax.artists != []:
  ax.artists[0].remove()

#remove all lines
while ax.lines != []:
  ax.lines[0].remove()

This works for dynamic plots (e.g. animation or ipywidgets). But if you tell there has to be a better way -- I'd definitely agree :)

Upvotes: 1

Paul H
Paul H

Reputation: 68186

From matplotlib's pyplot interface, you can pyplot.cla() to clear an entire axis and pyplot.clf() to clear an entire figure.

Upvotes: -1

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