Image:Probit plot.png

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[edit] Summary

Plot of the probit function $\sqrt{2}\,\operatorname{erf}^{-1}(2p-1)$ . I created this image myself with the following Python code:

from matplotlib.pylab import *
from scipy.special import erfinv
def probit(p): return sqrt(2)*erfinv(2*p-1)
x_i = arange(0.0001, 0.9999, 0.001)
plot(x_i, probit(x_i), 'r')
xlabel('probability')
ylabel('probit')
grid(True)
xticks(arange(0, 11)/10.0)
savefig('image.png', dpi=80)

[edit] Licensing

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	Date/Time	Dimensions	User	Comment
current	14:54, 12 January 2007	640×480 (15 KB)	Coffee2theorems (Talk \| contribs)	(Updated the plot by omitting axis labels because the article is about the probit function, whose definition as such does not include units. The plot in article on logit does not have any labels either.)
	13:43, 23 July 2006	640×480 (17 KB)	Coffee2theorems (Talk \| contribs)	(Plot of the probit function <math>\sqrt{2}\,\operatorname{erf}^{-1}(2p-1)</math>. I created this image myself with the following Python code: <pre> from matplotlib.pylab import * from scipy.special import erfinv def probit(p): return sqrt(2)erfinv(2p-1)