addFitLine 1.0

The stats toolbox is required for the 'linear' and 'quadratic' options only.function out=addFitLine(poolFits,modelType,lineprops,ax) Purpose Add one or more fit lines to some or all data in axes "ax" or, without ax specified, to the current axes. Inputs *poolFits [optional 0 by default] - if 1 we fit a single line to all data series on the current axes. *modelType ['linear' by default] - If 'linear' it fits a straight line using the regress function from the stats toolbox. If 'quadratic' it fits a second-order polynomial using regress. The output from regress is returned. If modelType is an integer, the function fit a polynomial of this order using polyfit, which is not part of the stats toolbox. The output of polyfit is then returned. *lineprops [optional 'b-' by default] *ax [optional - gca by default] Outputs out - the fit parameters and plot handles Examples clf %Fit two seperate lines subplot(1,3,1), hold on, x=-5:0.1:5; y=1+1*x+randn(size(x))*2; plot(x,y,'.k') y=2-4*x+randn(size(x))*2; plot(x,y,'.r') H=addFitLine %Fit one line to two sets of data subplot(1,3,2), hold on x=-5:0.2:0; y=0.3*x+randn(size(x))*2; plot(x,y,'.k') x=0:0.2:5; y=0.3*x+randn(size(x))*2; plot(x,y,'.r') H=addFitLine(1) %Fit one quadratic subplot(1,3,3) x=-5:0.1:5; y=2+0.3*x+0.5*x.^2+randn(size(x))*2; plot(x,y,'.k') addFitLine([],'quadratic') OR: addFitLine([],2) Rob Campbell - December 2009

Requirements:	No special requirements
Platforms:	Matlab
Keyword:	Brandnsizex,  Examples,  Handles,  Lineprops,  Plotxy,  Seperate,  Subplot,  X3d5015
Users rating:	0/10