On 08/28/2010 06:40 PM, xyz wrote:
> Hello,
> If I use autoscale_view than:
> * plt.text appears outside x and y coordinates
> * and the coordinates starts do not from 0 whereas I use ax.set_xlim(0)
> and ax.set_ylim(0)
>
> What did I wrong?
The call to autoscale_view overrides the earlier calls to set_xlim and
set_ylim. There is no built-in mechanism for autoscaling only the upper
limit, and holding the lower limit fixed. You could make such a
mechanism by writing a custom Locator, but it may make more sense to
calculate the upper limit directly in your code based on your data, and
then use set_xlim and set_ylim to set both ends of each axis.
Eric
>
> from pylab import *
> import matplotlib.pyplot as plt
>
> x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
> 20, 21, 22, 23, 24, 25, 26, 27, 28, 29]
> y1 = [20, 24, 8, 4, 12, 22, 31, 25, 15, 28, 12, 27, 22, 22, 27, 14, 32,
> 28, 8, 17, 2, 8, 29, 13, 14, 20, 11, 28, 8]
> y2= [2, 32, 28, 1, 22, 11, 14, 27, 3, 31, 12, 20, 32, 24, 24, 16, 7, 10,
> 12, 11, 3, 32, 10, 20, 14, 14, 3, 25, 14]
> point_labels1 = ['A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1',
> 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1',
> 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1', 'A=1']
> point_labels2 = ['B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1',
> 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1',
> 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1', 'B=1']
>
> fig = plt.figure()
> ax = fig.add_subplot(111)
>
> ax.set_title('The red point should be on the path')
>
> plt.plot(x, y1, 'bo', x, y2, 'go')
> ax.grid(True)
> ax.set_xlim(0.0)
> ax.set_ylim(0.0)
>
> fig.autofmt_xdate()
>
> plt.xticks(range(0, 40, 1))
>
> plt.yticks(range(0, 40, 1))
> plt.xlabel('Longitude')
> plt.ylabel('Latitude')
> plt.legend(('Model length', 'Data length'),
> 'best', shadow=True, fancybox=True)
>
> for i, label in enumerate(y1):
> plt.text (x[i], y1[i]+0.2, label,
> horizontalalignment='center' )
>
> for i, label in enumerate(y2):
> plt.text (x[i], y2[i]+0.2, label,
> horizontalalignment='center' )
>
>
> ax.autoscale_view()
> plt.savefig('test.png')
> plt.show()
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