Answered

What kind of optimization algorithm?

Stick your numerical data in a vector and then call min(.) or max(.) of that vector. This gives you the global min or max.

What kind of optimization algorithm?

Stick your numerical data in a vector and then call min(.) or max(.) of that vector. This gives you the global min or max.

11 years ago | 0

Answered

i need to find an equation that interpolates for a 3d set of data......

Look up the command interp3 in MATLAB's documentation which comes with MATLAB doesn't need any specific toolbox.

i need to find an equation that interpolates for a 3d set of data......

Look up the command interp3 in MATLAB's documentation which comes with MATLAB doesn't need any specific toolbox.

11 years ago | 0

Answered

Setting up a function to use with ODE solver

You need to write the equation in the dimentionless form. You cannot just simply write numbers like m = 9.10938188 * 10^-31...

Setting up a function to use with ODE solver

You need to write the equation in the dimentionless form. You cannot just simply write numbers like m = 9.10938188 * 10^-31...

11 years ago | 0

Answered

what is the mathematical notation equivalent to abs(A) for matrix A?

in office you can type ||A|| as to represent abs(A)

what is the mathematical notation equivalent to abs(A) for matrix A?

in office you can type ||A|| as to represent abs(A)

11 years ago | 0

Answered

Question about Taylor Series While loop.

add this line to the beginning of your code: Errrr =1;

Question about Taylor Series While loop.

add this line to the beginning of your code: Errrr =1;

11 years ago | 1

Answered

Extract sequences from vector

<http://www.mathworks.com/matlabcentral/answers/44977-how-can-i-generate-all-possible-combinations-from-multiple-sets-of-nch...

Extract sequences from vector

<http://www.mathworks.com/matlabcentral/answers/44977-how-can-i-generate-all-possible-combinations-from-multiple-sets-of-nch...

11 years ago | 0

Answered

Problem with computing an integral of a function

change the fun to fun = @(t) (sin(2*pi*t*697).*(sin(2*pi*t*941)+sin(2*pi*t*1477)))

Problem with computing an integral of a function

change the fun to fun = @(t) (sin(2*pi*t*697).*(sin(2*pi*t*941)+sin(2*pi*t*1477)))

11 years ago | 0

| accepted

Answered

Identify a connecting line

here are some useful command you can (may want to) use : BlocksYoureLookingFor = find_system(gcs,'BlockDialogParams','MyDlg...

Identify a connecting line

here are some useful command you can (may want to) use : BlocksYoureLookingFor = find_system(gcs,'BlockDialogParams','MyDlg...

11 years ago | 0

Answered

Renaming and deleting files using MatLab

doc system system Execute operating system command and return result Syntax system('command') [status, resul...

Renaming and deleting files using MatLab

doc system system Execute operating system command and return result Syntax system('command') [status, resul...

11 years ago | 0

Answered

derivative of a function of two variables

y = L1*cos(q1)+L2*cos(q2) yp =-L1*sin(q1)-L2*cos(q2) Do you want to take the derivative with respect to both independent...

derivative of a function of two variables

y = L1*cos(q1)+L2*cos(q2) yp =-L1*sin(q1)-L2*cos(q2) Do you want to take the derivative with respect to both independent...

11 years ago | 0

Answered

extrapolation.: Negative values obtained

Here's the whole concept of polynomial curve fitting: A first order polynomial is a line, like y=a*x+b which has only 2 param...

extrapolation.: Negative values obtained

Here's the whole concept of polynomial curve fitting: A first order polynomial is a line, like y=a*x+b which has only 2 param...

11 years ago | 0

Answered

How to solve a system of nonlinear 2nd order differential equations?

You need to use the optimization toolbox and it's fsolve(.) routine. You can embed all your nonlinear functions (can be an inte...

How to solve a system of nonlinear 2nd order differential equations?

You need to use the optimization toolbox and it's fsolve(.) routine. You can embed all your nonlinear functions (can be an inte...

11 years ago | 0

Answered

How can generalize several "For loop" ?

A=input('Enter nxn matrix:') B=input('Enter solution matrix(n*1):') [n n]=size(A); L=zeros(n); for i...

How can generalize several "For loop" ?

A=input('Enter nxn matrix:') B=input('Enter solution matrix(n*1):') [n n]=size(A); L=zeros(n); for i...

11 years ago | 0

| accepted

Answered

extrapolation.: Negative values obtained

The reason that the last data point is calculated negative is that, the last column is decreasing and if you take the last 4-5 p...

extrapolation.: Negative values obtained

The reason that the last data point is calculated negative is that, the last column is decreasing and if you take the last 4-5 p...

11 years ago | 0

Answered

Why doesn't my ODE solution to a simple exponential decay model go to zero?

The problem comes from this line set(gca, 'YScale', 'log'); Even if you do your own log10 for the y axis data by defining...

Why doesn't my ODE solution to a simple exponential decay model go to zero?

The problem comes from this line set(gca, 'YScale', 'log'); Even if you do your own log10 for the y axis data by defining...

11 years ago | 0

Answered

I have an equation that is the model equation for the experimental data that I have. I am unsure of how to plot this .

you can do somehthing like this: zmin = 1; zmax = 10; Rmin = (zmin/250)^(1/1.2); Rmax = (zmax/250)^(1/1.2); N = 1000...

I have an equation that is the model equation for the experimental data that I have. I am unsure of how to plot this .

you can do somehthing like this: zmin = 1; zmax = 10; Rmin = (zmin/250)^(1/1.2); Rmax = (zmax/250)^(1/1.2); N = 1000...

11 years ago | 0

Answered

I have an equation that is the model equation for the experimental data that I have. I am unsure of how to plot this .

See MATLAB help on loglog, plot, semilogx, semilogy

I have an equation that is the model equation for the experimental data that I have. I am unsure of how to plot this .

See MATLAB help on loglog, plot, semilogx, semilogy

11 years ago | 0

Answered

How to do parameter estimation of a ODE based model?

There are lessons on how to design an observer for a system in controls theory. They use the output of the estimator as the i...

How to do parameter estimation of a ODE based model?

There are lessons on how to design an observer for a system in controls theory. They use the output of the estimator as the i...

12 years ago | 0

Answered

how will use nested loop

Z = zeors(11,11); for i=1:11 for b=2:12 z=i*b; end end

how will use nested loop

Z = zeors(11,11); for i=1:11 for b=2:12 z=i*b; end end

12 years ago | 0

Answered

solving simple equations in matlab

d1 = 1:5; d2 = 6:10; for j=1:5 dat(j,:) = d1./(10.*d2(j)); end dat

solving simple equations in matlab

d1 = 1:5; d2 = 6:10; for j=1:5 dat(j,:) = d1./(10.*d2(j)); end dat

12 years ago | 0

Answered

Z transformation please help

Here's the answer: 2 + 4/z + 5/z^2 + 7/z^3 + 1/z^5 ROC is the whole complex domain.

Z transformation please help

Here's the answer: 2 + 4/z + 5/z^2 + 7/z^3 + 1/z^5 ROC is the whole complex domain.

12 years ago | 0

Answered

Why do I get this error?

Just worked on my computer.. here's your result: >> bandwidth(sys) ans = 2.0385 My ver command gives this: ...

Why do I get this error?

Just worked on my computer.. here's your result: >> bandwidth(sys) ans = 2.0385 My ver command gives this: ...

12 years ago | 0

Answered

How to stop recurring error message if Ctrl+C doesn't work!? (help!!!)

Ctrl+C works when the command window is the "current" or "chosen" window of MATLAB. You need to click on this window before doin...

How to stop recurring error message if Ctrl+C doesn't work!? (help!!!)

Ctrl+C works when the command window is the "current" or "chosen" window of MATLAB. You need to click on this window before doin...

12 years ago | 0

Answered

Control Gui with another Gui

I think you need to remove the line handles = 'Omhoog5Links' because handles includes all the data of the GUI and you are...

Control Gui with another Gui

I think you need to remove the line handles = 'Omhoog5Links' because handles includes all the data of the GUI and you are...

12 years ago | 0

Answered

Contour lines above surf or mesh plot (plot viewed top down)

You have a typo at this line: [c,h]=contour(data.X,data.Y,zy,'k',); Change it to [c,h]=contour(data.X,data.Y,zy,'k'...

Contour lines above surf or mesh plot (plot viewed top down)

You have a typo at this line: [c,h]=contour(data.X,data.Y,zy,'k',); Change it to [c,h]=contour(data.X,data.Y,zy,'k'...

12 years ago | 0

Answered

How do you change the color of a selected area under a curve

Here it is: Note that I only changed your plot() function to fill() and I added the end point and the first point of your data ...

How do you change the color of a selected area under a curve

Here it is: Note that I only changed your plot() function to fill() and I added the end point and the first point of your data ...

12 years ago | 0

Answered

how can i sort a matrix (all rows and columns are sorted) without using any special function like "sort"?

If you don't want to use sort() then you can write your own sorting algorithm. Like this one (untested): function B = mysort...

how can i sort a matrix (all rows and columns are sorted) without using any special function like "sort"?

If you don't want to use sort() then you can write your own sorting algorithm. Like this one (untested): function B = mysort...

12 years ago | 0

Answered

Mass spring damper system with sinusoidal input.

You can use MATLAB's internal ODE solvers like ODE45 to solve these differential equations numerically. See doc ODE45 for...

Mass spring damper system with sinusoidal input.

You can use MATLAB's internal ODE solvers like ODE45 to solve these differential equations numerically. See doc ODE45 for...

12 years ago | 0

Answered

How the transfer function block calculates the output?

2.5*e^(-2.5t) is the Laplace inverse of 2.5/(s+2.5) not (2.5/s+2.5). The Laplace transform of (...

How the transfer function block calculates the output?

2.5*e^(-2.5t) is the Laplace inverse of 2.5/(s+2.5) not (2.5/s+2.5). The Laplace transform of (...

12 years ago | 0

| accepted

Answered

Expand the Y-axis Scale

you can do this before axis equal: axis([0 1 0 0.9])

Expand the Y-axis Scale

you can do this before axis equal: axis([0 1 0 0.9])

12 years ago | 0

| accepted