currently trying this:
fig, ax1, ax3 = plt.subplots(1, 2, figsize=(10,5))
# share rate line and ax
ax1.plot(temp_df.index, temp_df['share_rate'], 'b-')
ax1.set_ylim([0,.03])
# % of total video views line and ax
ax2 = ax1.twinx()
ax2.plot(temp_df.index, temp_df['percent_of_total_views'], 'r-')
# third plot
ax3.plot([1,2,3,4], [1,2,3,4])
plt.show()
but receiving this error:
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-62-a8364e1f65f8> in <module>()
10 print "average share rate: "
11
---> 12 fig, ax1, ax3 = plt.subplots(1, 2, figsize=(10,5))
13
14 # share rate line and ax
ValueError: need more than 2 values to unpack
You are using matplotlibs subplots-function in a wrong way.
The statement of yours
fig, ax1, ax3 = plt.subplots(1, 2, figsize=(10,5)) # WRONG 3 vars on left, 2 are returned
expects a tuple of size 3 returned, which are put into fig, ax1, ax3
.
But the function returns only a tuple of size 2, fig, ax
where ax can be a single axis, or a sequence of axis-objects (see docs).
If you know, that this ax is a sequence of size 2, you could unpack it directly on the left side with:
fig, (ax1, ax3) = plt.subplots(1, 2, figsize=(10,5)) # CORRECT because 2nd return-value unpacked
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