> 2008/12/9 Angus McMorland <[EMAIL PROTECTED]>: > Hi James, > > 2008/12/8 James <[EMAIL PROTECTED]>: >> >> I have a very simple plot, and the lines join point to point, however i >> would like to add a line of best fit now onto the chart, i am really new >> to python etc, and didnt really understand those links! >> >> Can anyone help me :) > > It sounds like the second link, about linear regression, is a good > place to start, and I've made a very simple example based on that: > > ----------------------------------------------- > import numpy as np > import matplotlib.pyplot as plt > > x = np.linspace(0, 10, 11) #1 > data_y = np.random.normal(size=x.shape, loc=x, scale=2.5) #2 > plt.plot(x, data_y, 'bo') #3 > > coefs = np.lib.polyfit(x, data_y, 1) #4 > fit_y = np.lib.polyval(coefs, x) #5 > plt.plot(x, fit_y, 'b--') #6 > ------------------------------------------------
James, you'll want to add an extra line to the above code snippet so that Matplotlib displays the plot: plt.show() Cheers, Scott _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
