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# Miroslav Balda

Last seen: ungefär ett år ago Active since 2005

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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.

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...

ungefär 8 år 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...

ungefär 8 år ago | 1 answer | 0

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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...

mer än 8 år 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...

mer än 9 år ago | 0

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

mer än 9 år ago | 0

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Submitted

LMFnlsq2
Solution of one or more nonlinear equations in the least squares sense.

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...

nästan 10 år ago | 0

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

nästan 10 år 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...

nästan 10 år 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...

nästan 10 år 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...

nästan 10 år 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...

nästan 10 år ago | 0

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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...

nästan 10 år ago | 0

how can I remove similar numbers that FOLLOW ?
This code works: y=x([x(2:end),0]~=x(1:end));

nästan 10 år 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 = ...

nästan 10 år ago | 0

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

nästan 10 år ago | 0

Simple matlab doubt in a coding
See |http://www.mathworks.com/help/matlab/matlab_prog/anonymous-functions.html|

nästan 10 år ago | 0

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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...

nästan 10 år 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...

nästan 10 år ago | 0

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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...

nästan 10 år 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...

nästan 10 år ago | 1 answer | 0

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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...

nästan 10 år 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...

ungefär 10 år 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: ...

ungefär 10 år 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...

ungefär 10 år 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...

ungefär 10 år ago | 0

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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

ungefär 10 år ago | 0

Submitted

GETK
Wait for and identify a pressed key