setting a fixed position for matplotlib text

Question

(While there are several questions similar to my problem, Almost all of them were related to text-box, legend and annotation.)

Using a loop, I want to show specific information for 32 attributes: Histogram on the left and statistics on the right.

Dealing with just one attribute it's really simple, I set x,y for the text position and that's it:

#Histogram
sns.distplot(n1, kde=True)#fit=stats.beta)
plt.title('Histogram')
plt.xlabel('Duration')
plt.xticks(np.arange(0, max(n1)+1, 0.5))

#Statistics (There are 13 in total)
plt.text(1.85,5,'Standard Time: %6.4f'%(ST.iloc[j,0]))
plt.text(1.85,5,'Median: %6.4f'%(medmed))
plt.text(1.85,4.65,'Variance from ST: %6.2f '%(Totvarval))
plt.text(1.85,4.3,'Standard Deviation: %6.4f'%(np.std(n1)))

The problem is when I create the loop for all the attributes, given the different range of each, the text positions changes relatively causing such a result:

Example for 2 attributes

I know there should be a way to fix the coordination but I couldn't find it in the documentation.

matplotlib.org/users/text_props.html may help you

daryl
– daryl

2016-05-14 11:14:35 +00:00
Commented May 14, 2016 at 11:14 — daryl
– daryl, Commented May 14, 2016 at 11:14
matplotlib.org/users/annotations_intro.html

tacaswell
– tacaswell

2016-05-14 20:18:22 +00:00
Commented May 14, 2016 at 20:18 — tacaswell
– tacaswell, Commented May 14, 2016 at 20:18

tjollans · Accepted Answer · 2016-05-14 10:29:12Z

5

The coordinates passed to pyplot.text are data coordinates (as the documentation points out). This means that the absolute (pixel) coordinates your text goes at depend on the X and Y ranges of your plot axes. If you want to specify a position relative to the axes themselves rather than the data, you have to convert your coordinates, for example like this:

x0, xmax = plt.xlim()
y0, ymax = plt.ylim()
data_width = xmax - x0
data_height = ymax - y0
plt.text(x0 + data_width * 1.5, y0 + data_height * 0.5, 'Some text')

answered May 14, 2016 at 10:29

tjollans

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2 Comments

tacaswell Over a year ago

It is far better to use annotate and one of the figure or axes units. This lets mpl do that math for you and will stay in the same place if you pan/zoom.

tjollans Over a year ago

Sounds like a good idea. You should write an answer, @tcaswell !

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