On Sat, Sep 17, 2011 at 3:09 PM, Eric Firing <efir...@hawaii.edu> wrote:
> On 09/17/2011 09:57 AM, Klonuo Umom wrote:
>> Hi,
>> please consider this snippet:
>>
>> import matplotlib.pyplot as plt
>>
>> d={}
>> for i in range(1,21):
>> d[i] = i**2
>>
>> plt.plot(d.values())
>
> This is plotting values against the zero-based index. What you want is
>
> plt.plot(d.keys(), d.values())
While this is safe because calls to keys and values will return lists
in congruent order of no intervening dict modifications are made
http://stackoverflow.com/questions/835092/python-dictionary-are-keys-and-values-always-the-same-order
it is a bit fragile because there is no guarantee the dict keys will
be ordered, right, which is probably not what the OP wants. Maybe
x = sorted(d.keys())
y = [d[k] for k in x]
plot(x, y)
JDH
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