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How to fix Index exceeds matrix dimensions error?
hello Philip I corrected some minor bugs in matlab function blocks also lambda_nom is not initialized so I took lambda_nom =...

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Scaning a txt file
hello Carolina this code will scan the file and search for the targeted variables you can expand (add more variables) if you ...

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Edit Textfile for analysis
ok so my 2 cent suggestion to make that array looks nicer - lines = readlines('aba.txt','WhitespaceRule','trim'); ll_out ...

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Need Help about FFT and STFT
hello see the code below for (averaged) fft analysis and spectrogram you can easily incorporate a test to select samples tha...

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read files and check if something is number
hello see the different options in code below my prefered one is the second a=readcell('test.txt',"Delimiter",":"); % % o...

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Plotting a random walk step by step
hello IMHO, the problem comes that x and y are not reinitialized (put to zero) when you start the next walk so I changed thi...

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How to extract numbers from .dat file
hi again these are 3 options I tested for you ; i believe the second one is what you are looking for a=readcell('data.dat',"...

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How to compare two frequency time graphs?
hello see below , we are generating a signal with 2 frequencies , then do fft for showing their frequencies. the time plot w...

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How to denoise a response to step forcing?
hello I tried 2 simple methods : sliding window averaging : not very effective to fit an exp model : will almost give the ...

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using for loop plotting problem help me
hello I assumed that you wanted to plot I and error , but you forgot to index thos variables see below : f= @(x) 3*x^5+7*s...

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find the zero Value of a data
hello you use this function for detecting and ploting data crossing points threshold can be whatever value - not only zero ...

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Conditional statements on array.
hello Santos this is one way to do it split the input vector in 12 long extracts, then search for any value inside that is a...

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How do I import a column (f.e. C2:C37) of multiple Excel files into one vector in Matlab?
hello this is a simple code to load multiple excel (one sheet) data you can build your solution on this example file_list =...

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attenuate part of the audio
hello Sofia here some example below : %% example 1 : fading out the last 1 second of the wav file [Y1,Fs]=audioread('demo....

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How can I obtain the right convergence number from what I have done so far??
hello this seems to work better - :) clc clear x = input('Enter the angle in radians: '); Count = 0; Estimate = inf; Pre...

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How to create matrix with other matrixes by joining them?
hello here you are no loops res = zeros(2,2*size(a,2)); res(1,1:2:2*size(a,2)) = a; res(1,2:2:2*size(a,2)) = b; res(2,1:...

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Group data in specific potition (data redistribution)
hello back so I modified the code to respect empty sections - hope it helps ! % data1 = readcell('Input.xlsx'); data1 = ...

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Group data in specific potition (data redistribution)
Hello Ivan see below I added a 3rd line in your input file (just copied the first line) so that the output I generate can be...

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How to choose the right time and frequency vectors?
hello see example below : the notch filter simu is a bonus %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % load signal %%%%%%%%%%%%%...

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temporal discretisation and time step value
hello some suggestions / corrections for your code do not forget to pay attention to units , otherwise you may have wrong pul...

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read .csv file, append content to another .csv file
hello this is it : data1 = readcell('file1.csv'); data2 = readcell('file2.csv'); [m,n] = size(data2); data_out = [data1;d...

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Calculate the rate of change from 5 minutes interval
hello Ann welcome back ! here the end of the code , I don't know if the rate is per second or per minute, you to decide %___...

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How to solve a data length error in the function "filtfilt"?
hello Lea your issue is related to the size of the input data filtfilt works only on "vertical" vectors so the first dimens...

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Power Spectrum with frequency as x-axis and db level as y-axis
hello from what I see , the x axis units is already in Hz to convert to dB scale , use this : y_dB = 20*log10(abs(y_fft)) ...

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how to plot 3d spectrogram from data in txt file
hi using Walter's code above + the attachement , you have all the tools to do this spectrogram analysis all the best

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creating wav files that contain sequences of pulse bursts
hello so this would be my suggestion , build on the existing code you can uncomment the window section f it appeals to you ...

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Calculate standard deviation of 5-minute for different time interval
hello Ann I slightly modified your code so the data are resampled with time increment of 5 minutes (or whatever value you're ...

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How to pick data with fix moving window ?
hello create index vector with delta = 5 : ind = min(data):5:max(data); and use it to extract the corresponding data value...

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How to convert S-parameters (MA format) to transfer function or impulse response?
hello IMHO, the best way is to find a FIR or IIR filter that mimics the magnitude / phase plot of the FRF - see invfreqz once...

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How to use smoothing spline to fit a closed curve?
hello this will do the trick all the best , load('exampledata.mat') x = data1(:,1); y = data1(:,2); centroid_x = mean(x)...

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