神马作文网matlab 中fit函数怎么用?求例子
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matlab 中fit函数怎么用?求例子
看matlab自己的例子,help里边例子很丰富哈~~~
load censusplot(cdate,pop,'o')hold ons = fitoptions('Method','NonlinearLeastSquares',... 'Lower',[0,0],... 'Upper',[Inf,max(cdate)],... 'Startpoint',[1 1]);f = fittype('a*(x-b)^n','problem','n','options',s);[c2,gof2] = fit(cdate,pop,f,'problem',2);[c3,gof3] = fit(cdate,pop,f,'problem',3);plot(c2,'m')plot(c3,'c')
画出的图来:
load censusplot(cdate,pop,'o')hold ons = fitoptions('Method','NonlinearLeastSquares',... 'Lower',[0,0],... 'Upper',[Inf,max(cdate)],... 'Startpoint',[1 1]);f = fittype('a*(x-b)^n','problem','n','options',s);[c2,gof2] = fit(cdate,pop,f,'problem',2);[c3,gof3] = fit(cdate,pop,f,'problem',3);plot(c2,'m')plot(c3,'c')
画出的图来: