>>>>> "Colombes" == Colombes <Dr********@yahoo.com> writes:

Colombes> What is the easiest way to generate some plots and

Colombes> graphs in Python ? Specifically interested in simple

Colombes> histograms and scatter plots with circles and regression

Colombes> lines.

Here's a little example of a histogram and regression plot using

matplotlib - looks easy enough to me! Output image at

http://nitace.bsd.uchicago.edu:8080/...share/demo.png
from matplotlib.matlab import *

x = randn(10000) # some gaussian noise

subplot(211) # a subplot

hist(x, 100) # make a histogram

grid(True) # make an axes grid

ylabel('histogram')

# now do the regression...

x = arange(0.0, 2.0, 0.05)

y = 2+ 3*x + 0.2*randn(len(x)) # y is a linear function of x + nse

# the bestfit line from polyfit

m,b = polyfit(x,y,1) # a line is 1st order polynomial...

# plot the data with blue circles and the best fit with a thick

# solid black line

subplot(212)

plot(x, y, 'bo', x, m*x+b, '-k', linewidth=2)

ylabel('regression')

grid(True)

# save the image to hardcopy

savefig('demo')

show()