Answered

Solving system of three non linear equations??

There are multi-solutions: No. x1 x2 x3 1 200 -1.99488627715356E-26 7.80083304370558E-9 2 200.000000001348 6.28318530721954 -...

Solving system of three non linear equations??

There are multi-solutions: No. x1 x2 x3 1 200 -1.99488627715356E-26 7.80083304370558E-9 2 200.000000001348 6.28318530721954 -...

8 dagen ago | 0

Answered

Multi Variable Non-linear Curve Fitting in MATLAB

Hi, Fahd , refer to the results below： Root of Mean Square Error (RMSE): 1.09231944926872 Sum of Squared Residual: 1355.431781...

Multi Variable Non-linear Curve Fitting in MATLAB

Hi, Fahd , refer to the results below： Root of Mean Square Error (RMSE): 1.09231944926872 Sum of Squared Residual: 1355.431781...

22 dagen ago | 0

Answered

Solving trigonometric non-linear equations in MATLAB

For the numerical calculation, there are infinitely solutions: No. x y z 1 -0.555653038054963 5.06016630687609 -92.05890654406...

Solving trigonometric non-linear equations in MATLAB

For the numerical calculation, there are infinitely solutions: No. x y z 1 -0.555653038054963 5.06016630687609 -92.05890654406...

23 dagen ago | 0

Answered

Problem of Nonlinear Regression

Hi, Kim, if take time t as x, temperature T as y, your model function looks like: y=t1+(x0/(1-exp(-c+b*x))-1)/a; However, you...

Problem of Nonlinear Regression

Hi, Kim, if take time t as x, temperature T as y, your model function looks like: y=t1+(x0/(1-exp(-c+b*x))-1)/a; However, you...

24 dagen ago | 0

| accepted

Answered

how to find the best curve fit for a set of data

this function is good enough: y = p1/(1+p2*exp(-p3*x))+p4; Root of Mean Square Error (RMSE): 3.46432941573129 Sum of Squared ...

how to find the best curve fit for a set of data

this function is good enough: y = p1/(1+p2*exp(-p3*x))+p4; Root of Mean Square Error (RMSE): 3.46432941573129 Sum of Squared ...

24 dagen ago | 0

Answered

solving 5 non linear simultaneous equation

one more solution: h: 10985.2739483926 bsfc: 1154.64304691955 k: 71.7260719049847 a: 11.9021369375982 b: 0.0167429176020812...

solving 5 non linear simultaneous equation

one more solution: h: 10985.2739483926 bsfc: 1154.64304691955 k: 71.7260719049847 a: 11.9021369375982 b: 0.0167429176020812...

24 dagen ago | 0

Answered

solving 5 non linear simultaneous equation

Look this result: h: -4113.26496133792 bsfc: -432.338129213572 k: 67.8689272162873 a: -18.7135929756326 b: -0.0604868803921...

solving 5 non linear simultaneous equation

Look this result: h: -4113.26496133792 bsfc: -432.338129213572 k: 67.8689272162873 a: -18.7135929756326 b: -0.0604868803921...

25 dagen ago | 0

Answered

Solving non-linear equations (0)

try numerical solution: lamda1: 1.48312225679967E-24 qp1: 54185.6537859035 qn1: -133.888674663691 qc1: 0.188502621518643 qk...

Solving non-linear equations (0)

try numerical solution: lamda1: 1.48312225679967E-24 qp1: 54185.6537859035 qn1: -133.888674663691 qc1: 0.188502621518643 qk...

25 dagen ago | 0

Answered

How to curve fit an equation with sigma function

Hi, where are the values of Z?

How to curve fit an equation with sigma function

Hi, where are the values of Z?

29 dagen ago | 1

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

ongeveer een maand 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...

2 maanden 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!

2 maanden 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...

3 maanden 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...

3 maanden 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...

3 maanden 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...

3 maanden 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 ...

3 maanden 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...

3 maanden 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...

3 maanden 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)"

3 maanden 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...

3 maanden 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.

3 maanden 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...

3 maanden 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

3 maanden 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...

4 maanden 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...

4 maanden 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...

4 maanden 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...

4 maanden 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...

4 maanden ago | 0