Miroslav Balda

Last seen: 3 months 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.

7 years ago | 3 downloads |

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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...

7 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...

7 years 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...

8 years ago | 0

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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...

9 years ago | 0

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线性回归在半对数的规模
The following code solves your problem: % James.m % JAMES Linear regression on a semilog scale %%%%%%%%%%%%%%%%%%%%%...

9 years ago | 0

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Submitted

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

9 years ago | 18 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...

9 years ago | 0

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

9 years ago | 0

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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...

9 years ago | 0

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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...

9 years ago | 0

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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...

9 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...

9 years ago | 0

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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...

9 years ago | 0

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

9 years ago | 0

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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 = ...

9 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.tianjin-qmedu.com/matlabc...

9 years ago | 0

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Simple matlab doubt in a coding
See |//www.tianjin-qmedu.com/help/matlab/matlab_prog/anonymous-functions.html|

9 years ago | 0

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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...

9 years ago | 0

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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...

9 years ago | 0

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How to determine peaks in a large set of data
Try the function extr.m from |www.tianjin-qmedu.com/matlabcentral/fileexchange/10272| If vector |a| contains all samples of a...

9 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...

9 years ago | 1 answer | 0

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answer

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...

9 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...

9 years ago | 0

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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: ...

9 years ago | 0

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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...

9 years ago | 0

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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...

9 years ago | 0

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Answered
How can I improve peak detection in fast fourier tranform?
You may find the function sinfapm.m in the File Exchange: www.tianjin-qmedu.com/matlabcentral/fileexchange/19902

9 years ago | 0

Submitted

GETK
Wait for and identify a pressed key

10 years ago | 1 download |