Im wanting to use imshow() to create an image of a 2D histogram. However on several of the examples ive seen the 'extent' is defined. What does 'extent' actually do and how do you choose what values are appropriate?
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Please learn to read the [docs](http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.imshow) – tacaswell Aug 29 '13 at 16:03
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This question appears to be off-topic because it is about documentation – Andy Mar 01 '14 at 14:17
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Extent defines the images max and min of the horizontal and vertical values. It takes four values like so: extent=[horizontal_min,horizontal_max,vertical_min,vertical_max].
Gael Goret
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but in this example ive seen online that doesnt seem to be the case. [link](http://www.physics.ucdavis.edu/~dwittman/Matplotlib-examples/) – blablabla Aug 29 '13 at 12:52
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on the page you link to `extent` has the value `[-6.0, 4.0, -4.0, 6.0]`, which is exactly what Gael specified. – numentar Aug 29 '13 at 13:33