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 Author Comment/Response George Marrash 05/07/97 12:27pm Reply to message #300 from David Belisle: > Reply to message #198 from Roger J. Brown: > > Reply to message #180 from gregory b buck: > > > I'm having a problem getting Math 3.0 to conduct a linear regression on a set of unrelated points, graph the best fit line and the points together. Can anyone give me the ACTUAL COMMAND STRINGS required to do this, starting with the best way to input the coordinates. Thank you. > > > > Greg > > > > I am afraid I don't have your answer, but there are so few clues on how to use Mathematica for statistics, I thought you might know of a book on statistics using mathematica. I have the one for Linear Algebra and it is excellent. If you hear of one on stat, please let me know. > > > > Thanks > > > > RJB > > > If all you want to do is fit data, you can use the Fit[pts,{1,x},x] command. This will return the equation of a line (for higher orders, include the terms, ie replace {1,x} with {1,x,x^2} for a quadratic. To assign this as a function, type f[x_]= in front of it. Then plot the function (a=Plot[f[x],{x,x1,x2}]), plot the points (b=ListPlot[pts]), and then show them together (Show[a,b]). This creates three plots. To only show one, include DisplayFunction->Identity in the plot commands (b=ListPlot[pts,DisplayFunction->Identity]), and then you must also include DisplayFunction->\$DisplayFunction in the Show command (Show[a,b],DisplayFunction->\$DisplayFunction). To get the regression output (ss, dof ...) and the ANOVA output, use the LinearRegression Package (< > Cheers, > > Dave > If you go to http://www.mccallie.chattanooga.tn.us/george/physics/thin/thin.html you will find a notebook where I did a linear regression (actually the html output) I am sure that there are better ways to do the task, but that is how I did it. if you want i can email you the notebook hope this helps regards george URL: ,
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