Re: [matplotlib-devel] Lowess smoothing
Eric, Tony, thanks for your replies. I'll look at SciPy then for this functionality. Thanks, --Michiel. --- On Sat, 4/24/10, Eric Firing efir...@hawaii.edu wrote: From: Eric Firing efir...@hawaii.edu Subject: Re: [matplotlib-devel] Lowess smoothing To: Michiel de Hoon mjldeh...@yahoo.com Cc: matplotlib-devel@lists.sourceforge.net Date: Saturday, April 24, 2010, 2:29 PM Michiel de Hoon wrote: Hi everybody, A number of years ago I wrote a function to do Lowess smoothing to calculate a smooth curve through a scatter plot. I copied an example script below and attached the resulting figure to this mail. I think that such a smoothing function would be a useful addition to matplotlib. Does anybody have any objections against me adding this to matplotlib? If not, what would be a suitable place to put this function? --Michiel. Michiel, Certainly it would be good to have that function available, but I'm not in favor of putting it in mpl. The trend has been to try to reduce overlap among mpl, numpy, and scipy. To that end, scipy seems like the natural home for smoothing functions. Eric from pylab import * x = arange(0,10,0.01) ytrue = exp(-x/5.0) + 2*sin(x/3.0) # add random errors with a normal distribution y = ytrue + normal(size=len(x)) scatter(x,y,color='cyan') # calculate a smooth curve through the scatter plot ys = smooth(x, y, 'lowess') plot(x,ys,'red',linewidth=3) # draw the true values for comparison plot(x,ytrue,'green',linewidth=3) -- ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel -- ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
Re: [matplotlib-devel] Lowess smoothing
On Apr 24, 2010, at 4:25 AM, Michiel de Hoon wrote: Hi everybody, A number of years ago I wrote a function to do Lowess smoothing to calculate a smooth curve through a scatter plot. I copied an example script below and attached the resulting figure to this mail. I think that such a smoothing function would be a useful addition to matplotlib. Does anybody have any objections against me adding this to matplotlib? If not, what would be a suitable place to put this function? I'm not a matplotlib developer, but smoothing seems more appropriate for scipy. There's been some talk of starting a scikit for smoothing functions (see links below), but I'm not sure if anyone has the motivation to actually take the lead. -Tony http://mail.scipy.org/pipermail/scipy-user/2010-February/024402.html http://mail.scipy.org/pipermail/scipy-user/2010-February/024408.html-- ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
Re: [matplotlib-devel] Lowess smoothing
Michiel de Hoon wrote: Hi everybody, A number of years ago I wrote a function to do Lowess smoothing to calculate a smooth curve through a scatter plot. I copied an example script below and attached the resulting figure to this mail. I think that such a smoothing function would be a useful addition to matplotlib. Does anybody have any objections against me adding this to matplotlib? If not, what would be a suitable place to put this function? --Michiel. Michiel, Certainly it would be good to have that function available, but I'm not in favor of putting it in mpl. The trend has been to try to reduce overlap among mpl, numpy, and scipy. To that end, scipy seems like the natural home for smoothing functions. Eric from pylab import * x = arange(0,10,0.01) ytrue = exp(-x/5.0) + 2*sin(x/3.0) # add random errors with a normal distribution y = ytrue + normal(size=len(x)) scatter(x,y,color='cyan') # calculate a smooth curve through the scatter plot ys = smooth(x, y, 'lowess') plot(x,ys,'red',linewidth=3) # draw the true values for comparison plot(x,ytrue,'green',linewidth=3) -- ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel -- ___ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
