Answered

Need to solve this

Hi， How about the results belows: a: 214.703486863113 b: -10.7034868631133 c: -0.00690634104047918

Need to solve this

Hi， How about the results belows: a: 214.703486863113 b: -10.7034868631133 c: -0.00690634104047918

9 jours ago | 0

Answered

How to fit a curve to a step function?

Hi, Swati, the model function below seems to be good: Root of Mean Square Error (RMSE): 0.0112392378141364 Sum of Squared Re...

How to fit a curve to a step function?

Hi, Swati, the model function below seems to be good: Root of Mean Square Error (RMSE): 0.0112392378141364 Sum of Squared Re...

environ un mois ago | 0

Answered

How to fit a curve to a step function?

If possible, provide your data please!

How to fit a curve to a step function?

If possible, provide your data please!

environ un mois ago | 0

Answered

Equation of nonlinear data

The model function below is good enough, also very simple: rA = 1/(p1+p2*x); Root of Mean Square Error (RMSE): 0.0002191789906...

Equation of nonlinear data

The model function below is good enough, also very simple: rA = 1/(p1+p2*x); Root of Mean Square Error (RMSE): 0.0002191789906...

environ 2 mois ago | 0

Answered

Line search algorithm: nonlinear least squares method for fitting experimental data to a model

Hi, Kaouthar, the code changed to fellow, it ensures all parameters are postive, and the label of x_axis is your true xdata. How...

Line search algorithm: nonlinear least squares method for fitting experimental data to a model

Hi, Kaouthar, the code changed to fellow, it ensures all parameters are postive, and the label of x_axis is your true xdata. How...

environ 2 mois ago | 0

| accepted

Answered

How can I forecast an integer related to other 5 numbers?

Use the model function below: y = p1+p2*x1*x2+p3*x1*x3+p4*x1*x4+p5*x1*x5+p6*x2*x3+p7*x2*x4+p8*x2*x5+p9*x3*x4+p10*x3*x5+p11*x4*x...

How can I forecast an integer related to other 5 numbers?

Use the model function below: y = p1+p2*x1*x2+p3*x1*x3+p4*x1*x4+p5*x1*x5+p6*x2*x3+p7*x2*x4+p8*x2*x5+p9*x3*x4+p10*x3*x5+p11*x4*x...

environ 2 mois ago | 0

Answered

solve a non-linear least squares problem

only need to free the range of parameter "g" while keep other parameter ranges as originly, the result should be very good: Roo...

solve a non-linear least squares problem

only need to free the range of parameter "g" while keep other parameter ranges as originly, the result should be very good: Roo...

environ 2 mois ago | 0

Answered

Fitting Question

How about the function below: y=y0+A*exp(-0.5*((x-xc)/w)^2)+A1*exp(-exp(-(x-xc1)/w1)-(x-xc1)/w1+1); Root of Mean Square Error ...

Fitting Question

How about the function below: y=y0+A*exp(-0.5*((x-xc)/w)^2)+A1*exp(-exp(-(x-xc1)/w1)-(x-xc1)/w1+1); Root of Mean Square Error ...

environ 2 mois ago | 0

Answered

2D data fitting - Surface

The follow equation seems to be good, and simple enough: z = (x^0.5)^(p1/(1+y))+p2*x*y; Root of Mean Square Error (RMSE): 0.0...

2D data fitting - Surface

The follow equation seems to be good, and simple enough: z = (x^0.5)^(p1/(1+y))+p2*x*y; Root of Mean Square Error (RMSE): 0.0...

environ 2 mois ago | 1

Answered

Curve fitting tool with 4 variables

Hi, Mahesh, if you don't care the formation of the fitting equation, try the follows: y = sin((((((p1-x3)^2)*x3)/(((x3^2)^(x2^p...

Curve fitting tool with 4 variables

Hi, Mahesh, if you don't care the formation of the fitting equation, try the follows: y = sin((((((p1-x3)^2)*x3)/(((x3^2)^(x2^p...

environ 2 mois ago | 1

Answered

How to fix error of this type: "Failure in initial user-supplied objective function evaluation. FSOLVE cannot continue"

Hi，“z(2).z(1)” should be "z(2).*z(1)"

How to fix error of this type: "Failure in initial user-supplied objective function evaluation. FSOLVE cannot continue"

Hi，“z(2).z(1)” should be "z(2).*z(1)"

environ 2 mois ago | 0

Answered

Improving fit of custom function

Hi, what is the function you want to fit? y= A+m*x+(B+n*x)/(1+10^(-((x-C)/D))) or y= A+m*x+(B+n*x)/(1+exp(-((x-C)/D))) if th...

Improving fit of custom function

Hi, what is the function you want to fit? y= A+m*x+(B+n*x)/(1+10^(-((x-C)/D))) or y= A+m*x+(B+n*x)/(1+exp(-((x-C)/D))) if th...

environ 2 mois ago | 0

Answered

continuity of a fit function in different regions

Attach your data file please.

continuity of a fit function in different regions

Attach your data file please.

environ 2 mois ago | 0

Answered

Fit convergence to degenerated model - a reasonable expectation?

Hi，Dev-iL，theoretically，the SSE of f2 should be less or equal to that of f1, since f1 is the special case of f2, when b3=0. Als...

Fit convergence to degenerated model - a reasonable expectation?

Hi，Dev-iL，theoretically，the SSE of f2 should be less or equal to that of f1, since f1 is the special case of f2, when b3=0. Als...

environ 2 mois ago | 0

Answered

How to solve 4 equations with 4 unknowns with bounds?

Refer the results below: x1: 7.73410323214524 x2: 32.0801819920043 x3: 33.4573119565274 x4: 11.2688338748665

How to solve 4 equations with 4 unknowns with bounds?

Refer the results below: x1: 7.73410323214524 x2: 32.0801819920043 x3: 33.4573119565274 x4: 11.2688338748665

2 mois ago | 0

Answered

Solving Multivar Non-Linear Regression from a Data Set

try the function below: z = (p1+p2*x+p3*y)/(1+p4*x+p5*y)+p6; where z: moisture content; x: temperature; y:humidity Root of Me...

Solving Multivar Non-Linear Regression from a Data Set

try the function below: z = (p1+p2*x+p3*y)/(1+p4*x+p5*y)+p6; where z: moisture content; x: temperature; y:humidity Root of Me...

2 mois ago | 0

Answered

Fit convergence to degenerated model - a reasonable expectation?

Hi, I think you may make wrong calculation: with function of "f1(T) = A/( exp(B1/T + B2/T^2 ) + C )", the result is: R...

Fit convergence to degenerated model - a reasonable expectation?

Hi, I think you may make wrong calculation: with function of "f1(T) = A/( exp(B1/T + B2/T^2 ) + C )", the result is: R...

2 mois ago | 0

Answered

solve a system of equations

There are multi-solutions: 1: x: -4.93419751895286 y: -16.1073500969731 r: 327.876127534353 2: x: -3.55619697118012 y: -8...

solve a system of equations

There are multi-solutions: 1: x: -4.93419751895286 y: -16.1073500969731 r: 327.876127534353 2: x: -3.55619697118012 y: -8...

3 mois ago | 0

Answered

How can i linearise this equation in matlab? y=a*x*e^b*x

by linearization, the results are： a: 9.66178585962543 b: -2.47330876570272 While if using nonlinear regression fitting direc...

How can i linearise this equation in matlab? y=a*x*e^b*x

by linearization, the results are： a: 9.66178585962543 b: -2.47330876570272 While if using nonlinear regression fitting direc...

3 mois ago | 0

Answered

How to use multistart with 'fit' function

Multi-solutions (Parameter a is different): 1: Root of Mean Square Error (RMSE): 0.109662308225183 Sum of Squared Residual: 0...

How to use multistart with 'fit' function

Multi-solutions (Parameter a is different): 1: Root of Mean Square Error (RMSE): 0.109662308225183 Sum of Squared Residual: 0...

3 mois ago | 0

Answered

How to fit data to a Weibull bi-modal function ? nlinfit? lsqcurvefit?

please refer the results below: c1 6.93726775107201 c2 2.61789361078231 c3 5.06299442732144 c4 4.41925787462909 or: c1 5.0...

How to fit data to a Weibull bi-modal function ? nlinfit? lsqcurvefit?

please refer the results below: c1 6.93726775107201 c2 2.61789361078231 c3 5.06299442732144 c4 4.41925787462909 or: c1 5.0...

3 mois ago | 0

Answered

Fitting multiple Datasets with shared and individual Parameters.

Hi, Fabian Bienen, if possible please upload your data here, I may try to solve it.

Fitting multiple Datasets with shared and individual Parameters.

Hi, Fabian Bienen, if possible please upload your data here, I may try to solve it.

3 mois ago | 0

Answered

Line search algorithm: nonlinear least squares method for fitting experimental data to a model

Please upload your data，I may try.

Line search algorithm: nonlinear least squares method for fitting experimental data to a model

Please upload your data，I may try.

3 mois ago | 1

Answered

Non Linear Fit help?

For the fitting function: F = (((K.*(Vg-V).^(b+1)).^(-1))+R).^(-1); Obviously，should be: V < min(Vg) = 0, the reuslt may be: ...

Non Linear Fit help?

For the fitting function: F = (((K.*(Vg-V).^(b+1)).^(-1))+R).^(-1); Obviously，should be: V < min(Vg) = 0, the reuslt may be: ...

3 mois ago | 0

Answered

fsolve message "Equation solved, inaccuracy possible"

Multi-solutions: 1: x1: 1.00788811123075E-6 x2: 0.0083586258586415 x3: 0.0330975342164431 x4: 0.000243072462467804 x5: 4.2...

fsolve message "Equation solved, inaccuracy possible"

Multi-solutions: 1: x1: 1.00788811123075E-6 x2: 0.0083586258586415 x3: 0.0330975342164431 x4: 0.000243072462467804 x5: 4.2...

3 mois ago | 0

Answered

problem solving nonlinear equation system with fsolve

here are solutions: x1: 1.80929329243556 x2: 1.67586180846898 x3: 1.19942316545143

problem solving nonlinear equation system with fsolve

here are solutions: x1: 1.80929329243556 x2: 1.67586180846898 x3: 1.19942316545143

3 mois ago | 0

Answered

Non linear system of equations

multi-solutions: 1: x1 0.00357502545408908 x2 1.88403841412371 x3 3.32997281546349E-5 x4 2.49981876993596E-6 x5 2.40013395...

Non linear system of equations

multi-solutions: 1: x1 0.00357502545408908 x2 1.88403841412371 x3 3.32997281546349E-5 x4 2.49981876993596E-6 x5 2.40013395...

3 mois ago | 1

Answered

Fsolve Error! Need help- Using Fsolve to solve system of non-linear equations.

Hi， your equations seems to be Contradictory: "nc*(t1-t2)-(t1-x5)" lead to x5=381.7598 while "x5-(2.5^(.28571429)*t1)" lead t...

Fsolve Error! Need help- Using Fsolve to solve system of non-linear equations.

Hi， your equations seems to be Contradictory: "nc*(t1-t2)-(t1-x5)" lead to x5=381.7598 while "x5-(2.5^(.28571429)*t1)" lead t...

3 mois ago | 0