curve fit using a custom equation from command line without using cftool
I have some data that is curve fitting nicely using custom equation from cftool. The equation is: y = aexp(-bx)+c. Is there any way to make this same equation available from the command line? For instance using fit command and exp1 gives following results:
f = fit(time,T102,'exp1')
f =
General model Exp1:
f(x) = a*exp(b*x)
Coefficients (with 95% confidence bounds):
a = 0.0726 (0.0717, 0.0735)
b = -1.263e-05 (-4.171e-05, 1.645e-05)
However the form of this equation does not fit my data well. I need to have the equation as f(x) = aexp(bx) + c. I am aware that I can get it from cftool but I have many different sets of data to curve fit (~30) and I just want a, b, and c returned from by MATLAB in the custom equation f(x) = aexp(bx) + c.
matlab curve-fitting
asked Nov 11 at 12:54
PatStarks
5810
add a comment |
I have some data that is curve fitting nicely using custom equation from cftool. The equation is: y = aexp(-bx)+c. Is there any way to make this same equation available from the command line? For instance using fit command and exp1 gives following results:
f = fit(time,T102,'exp1')
f =
General model Exp1:
f(x) = a*exp(b*x)
Coefficients (with 95% confidence bounds):
a = 0.0726 (0.0717, 0.0735)
b = -1.263e-05 (-4.171e-05, 1.645e-05)
However the form of this equation does not fit my data well. I need to have the equation as f(x) = aexp(bx) + c. I am aware that I can get it from cftool but I have many different sets of data to curve fit (~30) and I just want a, b, and c returned from by MATLAB in the custom equation f(x) = aexp(bx) + c.
matlab curve-fitting
asked Nov 11 at 12:54
PatStarks
5810
1
Is this link helpful? stackoverflow.com/questions/10890438/…
– James Phillips
Nov 11 at 20:05
add a comment |
I have some data that is curve fitting nicely using custom equation from cftool. The equation is: y = aexp(-bx)+c. Is there any way to make this same equation available from the command line? For instance using fit command and exp1 gives following results:
f = fit(time,T102,'exp1')
f =
General model Exp1:
f(x) = a*exp(b*x)
Coefficients (with 95% confidence bounds):
a = 0.0726 (0.0717, 0.0735)
b = -1.263e-05 (-4.171e-05, 1.645e-05)
However the form of this equation does not fit my data well. I need to have the equation as f(x) = aexp(bx) + c. I am aware that I can get it from cftool but I have many different sets of data to curve fit (~30) and I just want a, b, and c returned from by MATLAB in the custom equation f(x) = aexp(bx) + c.
matlab curve-fitting
asked Nov 11 at 12:54
PatStarks
5810
I have some data that is curve fitting nicely using custom equation from cftool. The equation is: y = aexp(-bx)+c. Is there any way to make this same equation available from the command line? For instance using fit command and exp1 gives following results:
f = fit(time,T102,'exp1')
f =
General model Exp1:
f(x) = a*exp(b*x)
Coefficients (with 95% confidence bounds):
a = 0.0726 (0.0717, 0.0735)
b = -1.263e-05 (-4.171e-05, 1.645e-05)
However the form of this equation does not fit my data well. I need to have the equation as f(x) = aexp(bx) + c. I am aware that I can get it from cftool but I have many different sets of data to curve fit (~30) and I just want a, b, and c returned from by MATLAB in the custom equation f(x) = aexp(bx) + c.
matlab curve-fitting
matlab curve-fitting
asked Nov 11 at 12:54
PatStarks
5810
asked Nov 11 at 12:54
PatStarks
5810
asked Nov 11 at 12:54
PatStarks
5810
asked Nov 11 at 12:54
PatStarks
5810
asked Nov 11 at 12:54
PatStarks
5810
5810
1
Is this link helpful? stackoverflow.com/questions/10890438/…
– James Phillips
Nov 11 at 20:05
add a comment |
1
Is this link helpful? stackoverflow.com/questions/10890438/…
– James Phillips
Nov 11 at 20:05
1
1
Is this link helpful? stackoverflow.com/questions/10890438/…
– James Phillips
Nov 11 at 20:05
Is this link helpful? stackoverflow.com/questions/10890438/…
– James Phillips
Nov 11 at 20:05
add a comment |
1 Answer
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I ended up finding my answer using information from following link:
https://www.mathworks.com/help/curvefit/fit.html
Create a matlab function that contains custom equation for fit
function y = CustomCurveFitFunction(x,a,b,c)
y = aexp(-bx) + c;
end
Call the function in the following manner from MATLAB
ft = fittype('CustomCurveFitFunction(x, a, b, c)');
f = fit(time, y, ft);
answered Nov 12 at 5:06
PatStarks
5810
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
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active
oldest
votes
I ended up finding my answer using information from following link:
https://www.mathworks.com/help/curvefit/fit.html
Create a matlab function that contains custom equation for fit
function y = CustomCurveFitFunction(x,a,b,c)
y = aexp(-bx) + c;
end
Call the function in the following manner from MATLAB
ft = fittype('CustomCurveFitFunction(x, a, b, c)');
f = fit(time, y, ft);
answered Nov 12 at 5:06
PatStarks
5810
add a comment |
I ended up finding my answer using information from following link:
https://www.mathworks.com/help/curvefit/fit.html
Create a matlab function that contains custom equation for fit
function y = CustomCurveFitFunction(x,a,b,c)
y = aexp(-bx) + c;
end
Call the function in the following manner from MATLAB
ft = fittype('CustomCurveFitFunction(x, a, b, c)');
f = fit(time, y, ft);
answered Nov 12 at 5:06
PatStarks
5810
add a comment |
I ended up finding my answer using information from following link:
https://www.mathworks.com/help/curvefit/fit.html
Create a matlab function that contains custom equation for fit
function y = CustomCurveFitFunction(x,a,b,c)
y = aexp(-bx) + c;
end
Call the function in the following manner from MATLAB
ft = fittype('CustomCurveFitFunction(x, a, b, c)');
f = fit(time, y, ft);
answered Nov 12 at 5:06
PatStarks
5810
I ended up finding my answer using information from following link:
https://www.mathworks.com/help/curvefit/fit.html
Create a matlab function that contains custom equation for fit
function y = CustomCurveFitFunction(x,a,b,c)
y = aexp(-bx) + c;
end
Call the function in the following manner from MATLAB
ft = fittype('CustomCurveFitFunction(x, a, b, c)');
f = fit(time, y, ft);
answered Nov 12 at 5:06
PatStarks
5810
answered Nov 12 at 5:06
PatStarks
5810
answered Nov 12 at 5:06
PatStarks
5810
answered Nov 12 at 5:06
PatStarks
5810
5810
add a comment |
add a comment |
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1
Is this link helpful? stackoverflow.com/questions/10890438/…
– James Phillips
Nov 11 at 20:05