Undefined function for input arguments of type 'double' - fit function
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I'm running the following code:
close all
clear
clc
x = [0:0.01:1];
A=[0.0; 0.2; 0.4; 0.6; 0.8; 1.0];
B=[0.0; 0.034; 0.12; 0.267; 0.5; 1.0];
f=fit(A,B,'poly2')
But it results in the following error:
Undefined function 'fit' for input arguments of type 'double'.
Error in filename (line 68)
f=fit(A,B,'poly2')
I checked that the folder is in the correct path.
Help is appreciated.
采纳的回答
Guillaume
2018-12-23
3 个投票
Most likely you don't have the curve fitting toolbox installed or you don't have a license for it.
6 个评论
madhan ravi
2018-12-23
+1 right point
Guillaume
2018-12-23
I do have it installed: Statistics and Machine Learning Toolbox Version 11.3 (R2018a)
fit is part of the Curve Fitting Toolbox not the Statistics toolbox.
madhan ravi
2018-12-23
True..
Jochem
2018-12-23
Georgios Tsimplis
2020-7-26
编辑：Georgios Tsimplis
2020-7-26
I did it !!!! it works! thanks for your help!
madhan ravi
2020-7-26
Georgios isn’t that what I told you in your question?
更多回答（1 个）
madhan ravi
2018-12-23
What does the below show?
which fit -all
whos fit
4 个评论
Jochem
2018-12-23
madhan ravi
2018-12-23
编辑：madhan ravi
2018-12-23
You are missing two files:
/Applications/MATLAB_R2018b.app/toolbox/curvefit/curvefit/fit.p
/Applications/MATLAB_R2018b.app/toolbox/curvefit/curvefit/fit.m
Two options you have got now:
1) As Guillaume says either you would not be having Curve Fitting Toolbox installed or have a license for it , so you will have a question how to check those:
ver % in command window , check whether you have Statistics and Machine Learning Toolbox
license('checkout','Curve_Fitting_Toolbox') % if it returns 1 then you have a valid license
2) If the first option fails get the two files by contacting the Mathworks Support Team by clicking the Contact Us button on the top right corner of this page.
EDIT : Sorry Guillaume didn't notice your answer properly.
Jochem
2018-12-23
madhan ravi
2018-12-23
So just follow my second option .
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