Alex Goodman created ZEPPELIN-1318:
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Summary: Add support for png images in z.show()
Key: ZEPPELIN-1318
URL: https://issues.apache.org/jira/browse/ZEPPELIN-1318
Project: Zeppelin
Issue Type: Improvement
Components: python-interpreter
Affects Versions: 0.7.0
Reporter: Alex Goodman
Fix For: 0.7.0
The current implementation of {{z.show()}} supports matplotlib plotting svg
images inline. However with some type of plots in matplotlib, particularly for
maps via basemap, this causes the UI in the notebook to severely lag when the
output isn't hidden. Saving the images in .png format solves this problem, but
a different implementation is required in order to plot the image inline. I
have proposed a solution below where the image is saved into a byte array and
then displayed directly via html:
{code}
import cStringIO
import base64
def show(p):
img = cStringIO.StringIO()
p.savefig(img, format='png')
imgStr = "data:image/png;base64,"
imgStr += base64.b64encode(img.getvalue().strip())
print "%html <img src='" + imgStr + "'>"
{code}
I will incorporate this into zeppelin's {{z.show()}} function.
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