335 total contributions since 2005

Submitted

SINIDE - Parameter identification of a sine-wave from a measured signal

Frequency, amplitude, phase shift and mean value of the best sinus fit to a sampled signal.

2 years ago | 6 downloads |

Answered

Importing data from text file

You have preprocessed the problem rather far. Store 'the_file' in the text file, say 'data.txt' and then use the function txt2ma...

Importing data from text file

You have preprocessed the problem rather far. Store 'the_file' in the text file, say 'data.txt' and then use the function txt2ma...

3 years ago | 0

Question

RecursionLimit reached without applying recursion calls.

I have got the message that the recurence limit is reached, when I wanted to run big program I am just debugging. There was also...

3 years ago | 1 answer | 0

Answered

To fit power law

If you plot the given vectors by the statement semilogy(A(:,1),A(:,2),':o'),you observe that the pure power function does not f...

To fit power law

If you plot the given vectors by the statement semilogy(A(:,1),A(:,2),':o'),you observe that the pure power function does not f...

3 years ago | 0

Answered

Importing file with text and numbers

The prwvious answer gives a possible solution, however the function fgetl is rather slow. Maybe, the alternative way is in appli...

Importing file with text and numbers

The prwvious answer gives a possible solution, however the function fgetl is rather slow. Maybe, the alternative way is in appli...

4 years ago | 0

Answered

Linear regression on a semi-log scale

The following code solves your problem: % James.m % JAMES Linear regression on a semilog scale %%%%%%%%%%%%%%%%%%%%%...

Linear regression on a semi-log scale

The following code solves your problem: % James.m % JAMES Linear regression on a semilog scale %%%%%%%%%%%%%%%%%%%%%...

4 years ago | 0

| accepted

Submitted

LMFnlsq2

Solution of one or more nonlinear equations in the least squares sense.

4 years ago | 12 downloads |

Answered

imaginary value from solution nonlinier least square

Let us reformulate the problem: data = (q + 1./r).*exp(-r*q).*(0.6/(p(1)*r.^2)), where q = sqrt(p(2)); The prob...

imaginary value from solution nonlinier least square

Let us reformulate the problem: data = (q + 1./r).*exp(-r*q).*(0.6/(p(1)*r.^2)), where q = sqrt(p(2)); The prob...

4 years ago | 0

| accepted

Answered

diagonal matrix with ones

There is even simpler solutionof your problem: Anew = diag(diag(A))\tril(A)

diagonal matrix with ones

There is even simpler solutionof your problem: Anew = diag(diag(A))\tril(A)

4 years ago | 0

Answered

conversion of array to vector

The first command is useless. Suppose inpIamage is a matrix, the character of Mean depends of your function mean2. Should functi...

conversion of array to vector

The first command is useless. Suppose inpIamage is a matrix, the character of Mean depends of your function mean2. Should functi...

4 years ago | 0

Answered

diagonal matrix with ones

Your last comment explained how to construct the resulting matrix. You see, how important it is to precisely formulate your ques...

diagonal matrix with ones

Your last comment explained how to construct the resulting matrix. You see, how important it is to precisely formulate your ques...

4 years ago | 0

Answered

how to create start point for multistart

Your question is not very clear, however, the following solution may help you: oristart = [lb1,lb2,lb3,r,s1,b1,s2,b2]; n...

how to create start point for multistart

Your question is not very clear, however, the following solution may help you: oristart = [lb1,lb2,lb3,r,s1,b1,s2,b2]; n...

4 years ago | 0

Answered

fitting function with many parameters (fminsearch)

This may happen, if there are order differences among values of unknown parametres. Let's assume those parameters are gathered i...

fitting function with many parameters (fminsearch)

This may happen, if there are order differences among values of unknown parametres. Let's assume those parameters are gathered i...

4 years ago | 0

| accepted

Answered

curve fitting with more then two independent variables

If the regression function is in right MATLAB notation f(x) = (a+b*x.*z)./(1+c*x) % see dots between x and z and before...

curve fitting with more then two independent variables

If the regression function is in right MATLAB notation f(x) = (a+b*x.*z)./(1+c*x) % see dots between x and z and before...

4 years ago | 0

Answered

how can I remove similar numbers that FOLLOW ?

This code works: y=x([x(2:end),0]~=x(1:end));

how can I remove similar numbers that FOLLOW ?

This code works: y=x([x(2:end),0]~=x(1:end));

4 years ago | 0

Answered

sum function and add using loop

Let your data be in vector data(1:31536001). Try this code: k = 0; K = 0; x = zeros(1,8760); while k<8760, k = ...

sum function and add using loop

Let your data be in vector data(1:31536001). Try this code: k = 0; K = 0; x = zeros(1,8760); while k<8760, k = ...

4 years ago | 0

Answered

Import text file with header

The simplest way to read such data is in using the function txt2mat fro the File Exchange: www.mathworks.com/matlabc...

Import text file with header

The simplest way to read such data is in using the function txt2mat fro the File Exchange: www.mathworks.com/matlabc...

4 years ago | 0

Answered

Simple matlab doubt in a coding

See |http://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html|

Simple matlab doubt in a coding

See |http://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html|

4 years ago | 0

| accepted

Answered

saving plots and reopening them

Figures stored in *.ppg files can't be opend in MATLAB. If you plan to reopen figures in MATLAB, Y should save them in *.fig fil...

saving plots and reopening them

Figures stored in *.ppg files can't be opend in MATLAB. If you plan to reopen figures in MATLAB, Y should save them in *.fig fil...

4 years ago | 0

Answered

How can I solve a system in complex variables ?

The structure of the MATLAB code without an application of the Symbolic Toolbox should be as follows: 1. All constant parame...

How can I solve a system in complex variables ?

The structure of the MATLAB code without an application of the Symbolic Toolbox should be as follows: 1. All constant parame...

4 years ago | 0

| accepted

Answered

How to determine peaks in a large set of data

Try the function extr.m from |www.mathworks.com/matlabcentral/fileexchange/10272| If vector |a| contains all samples of a...

How to determine peaks in a large set of data

Try the function extr.m from |www.mathworks.com/matlabcentral/fileexchange/10272| If vector |a| contains all samples of a...

4 years ago | 0

Question

Building legends with extraordinary properties

Legend command denotes all plotted items in a serial order. Questions: *1.* Is there a way how to skip denoting some plotted i...

4 years ago | 1 answer | 0

Answered

How can I solve a system in complex variables ?

Maybe that you can get a solution in a simpler way just in MATLAB without using symbolic approach. Your equation is complex depe...

How can I solve a system in complex variables ?

Maybe that you can get a solution in a simpler way just in MATLAB without using symbolic approach. Your equation is complex depe...

4 years ago | 0

Answered

how to load a txt data

The general program for processing files of presented structure follows: % IONS.m Answers: Mohamad, 3.2.2013, 12:14...

how to load a txt data

The general program for processing files of presented structure follows: % IONS.m Answers: Mohamad, 3.2.2013, 12:14...

4 years ago | 0

Answered

how to load a txt data

Your code doesn't create or print data in the required format. The following code does it. The input data are in file IONS.txt: ...

how to load a txt data

Your code doesn't create or print data in the required format. The following code does it. The input data are in file IONS.txt: ...

4 years ago | 0

Answered

Frequency of combined waveform

It is not clear what you want to find. However, the next code finds all parameters of the combined wave, i.e. amplitudes, freque...

Frequency of combined waveform

It is not clear what you want to find. However, the next code finds all parameters of the combined wave, i.e. amplitudes, freque...

4 years ago | 0

Answered

creating the same format for the dates

The following code fulfils the requirement, should the format of input dates be dd/mm/yyyy or mm/yyyy: dates= { '1...

creating the same format for the dates

The following code fulfils the requirement, should the format of input dates be dd/mm/yyyy or mm/yyyy: dates= { '1...

4 years ago | 0

| accepted

Answered

How can I improve peak detection in fast fourier tranform?

You may find the function sinfapm.m in the File Exchange: www.mathworks.com/matlabcentral/fileexchange/19902

How can I improve peak detection in fast fourier tranform?

You may find the function sinfapm.m in the File Exchange: www.mathworks.com/matlabcentral/fileexchange/19902

4 years ago | 0

Submitted

Soft interrupting of long computer runs

Long run of the program can be interrupted without any loss of data in a workspace.

5 years ago | 0 downloads |