<p dir="ltr">Please don't do ax.collections.pop(), it is better to keep a reference to the object returned by contour and then using its remove method. </p>
<p dir="ltr">The second way is safer as you will always remove the artist you think you are removing and more future proof as the lists of artists (lines, collections, ...) really should be considered internal details of mpl and not accessed directly.</p>
<p dir="ltr">Tom</p>
<br><div class="gmail_quote"><div dir="ltr">On Tue, Oct 27, 2015, 01:38 Slavin, Jonathan <<a href="mailto:jslavin@cfa.harvard.edu">jslavin@cfa.harvard.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Hi Mike,</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Yes, that's basically what I ended up doing. I did</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">ax.collections.pop()</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">ax.contour(...)</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I'm not sure if there's a different (better?) way to remove the contours, but that works.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">By the way, it was not easy to discover that contours are collections (a LineCollection), though I guess it's not too hard to guess. I think the docs could provide more information along these lines.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Jon</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Oct 26, 2015 at 11:07 AM, Michael Droettboom <span dir="ltr"><<a href="mailto:mdroettboom@continuum.io" target="_blank">mdroettboom@continuum.io</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">You're correct that there is no equivalent -- contour is one of those "computed" things that can't be directly updated from the original data. You don't need to do a whole `cla()` though. Removing the contour artist and calling contour again should be sufficient.<div><br></div><div>Mike</div></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div>On Fri, Oct 23, 2015 at 11:56 AM, Slavin, Jonathan <span dir="ltr"><<a href="mailto:jslavin@cfa.harvard.edu" target="_blank">jslavin@cfa.harvard.edu</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Hi,</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I'm looking at a series of images and want to include overplotted contours. To update the image I just need to use the set_data() method of the AxesImage object. However, as far as I can tell, there's nothing similar for the QuadContourSet object. I tried set_array() but that didn't work. Am I missing something? Does anyone have any suggestions for how to update the contours? Of course if necessary I could do a cla(), but that would be slow, I think.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Regards,</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Jon</div><span><font color="#888888">-- <br><div><div dir="ltr"><div><div dir="ltr">________________________________________________________<br>Jonathan D. Slavin Harvard-Smithsonian CfA<br><a href="mailto:jslavin@cfa.harvard.edu" target="_blank">jslavin@cfa.harvard.edu</a> 60 Garden Street, MS 83<br>phone: <a href="tel:%28617%29%20496-7981" value="+16174967981" target="_blank">(617) 496-7981</a> Cambridge, MA 02138-1516<br>cell: <a href="tel:%28781%29%20363-0035" value="+17813630035" target="_blank">(781) 363-0035</a> USA<br>________________________________________________________<br><br></div></div></div></div>
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<br></blockquote></div><span><font color="#888888"><br><br clear="all"><div><br></div>-- <br><div><div dir="ltr">Michael Droettboom<div>Continuum Analytics</div></div></div>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div><div dir="ltr"><div><div dir="ltr">________________________________________________________<br>Jonathan D. Slavin Harvard-Smithsonian CfA<br><a href="mailto:jslavin@cfa.harvard.edu" target="_blank">jslavin@cfa.harvard.edu</a> 60 Garden Street, MS 83<br>phone: (617) 496-7981 Cambridge, MA 02138-1516<br>cell: (781) 363-0035 USA<br>________________________________________________________<br><br></div></div></div></div>
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