MATLAB曲线拟合在图形上显示方程式 [英] MATLAB curve fit display equation on graph

问题描述

有没有一种方法可以在生成的图形上显示curvefit公式，而不必每次都自己手动写下?通过GUI或命令行，一切正常.有什么办法可以解决吗?

Is there a way to display the curvefit equation on the graph produced without having to write it down myself manually every time? By GUI or command-line, anything is okay. Any hacks, some way to get around this?

推荐答案

可能最容易使用fit实用程序，该实用程序与使用curvefit的非图形等效项:

Probably easiest to use the fit utility which is the non-graphical equivalent of using curvefit:

% sample data
x=[1:10]'; 
y = x+randn(10,1)*0.5; 
plot(x,y,'o')

pars=fit(x,y,'poly1');

pars包含拟合结果，您可以使用

pars contains the result of the fit, which you can overlay on the plot above with

hold on
plot(pars)

如果要查看各个参数的值，可以键入pars.p1或pars.p2(在此示例中，其他型号可能会有其他参数"pn")

If you want to see the values of individual parameters, you can type pars.p1 or pars.p2 (for this example, there may be other parameters "pn" for other models)

要显示在该图上，您可以执行

To display on the figure, you can do something simple like

xpos=3;
ypos=9;
text(xpos,ypos,{num2str([pars.p1;pars.p2])})

有关更多信息，请查阅曲线的文档，或尝试使用help curvefit或.

For more info look into the documentation for curvefit or try help curvefit or help fit.

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