Re: 2D histogram of x,y values
- To: mathgroup at smc.vnet.net
- Subject: [mg14271] Re: 2D histogram of x,y values
- From: Lars Hohmuth <larsh>
- Date: Mon, 12 Oct 1998 13:51:51 -0400
- Organization: Wolfram Research, Inc.
- Sender: owner-wri-mathgroup at wolfram.com
> Subject: > 2D histogram of x,y values > Date: > 7 Oct 1998 03:45:26 -0400 > From: To: mathgroup at smc.vnet.net > "Jurgen F. Doreleijers" > Organization: > NMR spectroscopy; Utrecht University; The Netherlands > Newsgroups: > comp.soft-sys.math.mathematica > > > > > Hi, > > How can I make a 2D histogram of a list of x,y values? I would like to > make a contour plot with the results. > > Thanks for your attention. > > -- > Drs. Jurgen F. Doreleijers > NMR spectroscopy, Utrecht University, The Netherlands > mailto:jurgen at nmr.chem.uu.nl > http://www.nmr.chem.uu.nl/~jurgen > I am not exactly sure what you are looking for, so here is my best guess. If you have a set of {x,y} data and you want to count the how often the {x,y} values fall into a certain range, you can use BinCounts in Statistics`DataManipulation` In[1]:= <<Statistics`DataManipulation` In[2]:= listdata = N[Table[{i,i},{i,0,3}]]; In[3]:= BinCounts[listdata,{0,3,1},{0,3,1}] Out[3]= {{1,0,0},{0,1,0},{0,0,1}} In[4]:= ListDensityPlot[%] (*ListContourPlot doesn't make much sense for such a small set*) Hope this helps, Lars Hohmuth Wolfram Research, Inc.