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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.

8 years ago | 2 downloads |

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...

9 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...

9 years ago | 1 answer | 0

### 1

answerTo 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...

9 years ago | 0

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...

10 years ago | 0

Linear regression on a semi-log scale

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

10 years ago | 0

| accepted

Submitted

LMFnlsq2

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

11 years ago | 8 downloads |

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...

11 years ago | 0

| accepted

diagonal matrix with ones

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

11 years ago | 0

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...

11 years ago | 0

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...

11 years ago | 0

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...

11 years ago | 0

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...

11 years ago | 0

| accepted

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...

11 years ago | 0

how can I remove similar numbers that FOLLOW ?

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

11 years ago | 0

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 = ...

11 years ago | 0

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...

11 years ago | 0

Simple matlab doubt in a coding

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

11 years ago | 0

| accepted

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...

11 years ago | 0

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...

11 years ago | 0

| accepted

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...

11 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...

11 years ago | 1 answer | 0

### 1

answerHow 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...

11 years ago | 0

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...

11 years ago | 0

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: ...

11 years ago | 0

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...

11 years ago | 0

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...

11 years ago | 0

| accepted

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

11 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.

12 years ago | 1 download |