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System Identification Toolbox not importing data properly
hello seems you are giving the amplitude in dB whereas the ID toolbox parameters is waiting for a linear scale amplitude so yo...

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How to cross correlate two audio files
hello you forgot to check that x and y must have exactly the same length to use xcorr so this is a little improvement to avoid...

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How to plot smooth curve
hello simply increase the x axis points density change the first two lines so you have now 10 more points in your curves - l...

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Read a list of filenames in a text file
hi this is my suggestion files = readcell('file_list.txt'); % read txt file to get mat filenames % % this is just to ge...

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How concatenate all the excel filles in one table in MATLAB
hi this is an example folder = cd; folderout = [cd '\out']; Files = dir(fullfile(folder, '*.xlsx')); % Use absolut...

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MatLab: Average (column,row) entry across many different files -> create output file
So this is my suggestion I wonder why we need to average also the 3rd column with is the time values ?? making not much sense I...

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Stacked spectrogram with months on horizontal axis and frequency on vertical axis
hi this is my suggestion; the spectrogram individual data are "stacked" along the time axis NB that the frequency content i...

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Determining frequency of pulses from a shaft encoder
hello Marc this is a simple home made counter that is used to calculate the actual frequency of the incoming signal the frequ...

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How do I calculate the SPL from a .wav file with a calibrated value?
hello you can simply compare the rms value of the two wav files to know the SPL of the signal vs the calibrated signal : S...

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Create multiple excel sheet using loop and rename them using loop
hello this is my suggestion : VariableNames = {'Customer','x','y','d'}; SheetNames = {'A','B','C','D'}; filename_out = '...

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How to make Narrow Bandpass filter?
hello seems I have already seen similar post somewhere... a buddy of yours ? you did not mentionned the sampling frequency , ...

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How to obtain transfer function coefficients from data plot?
hello you need to use tfest sys = tfest(data,np) estimates a continuous-time transfer function sys using the time-domain or fr...

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Hello everyone, I now have a set of data. I would like to ask how to draw these scattered points in polar coordinates with the centroid point as the center.
hello this would be my suggestion : load data1.mat load centroids.mat x=data1(:,1)-centroids(:,1); % centered plot y=da...

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How to plot timeseries graph
hello again a sample code that can help you % data format (7 columns) % depth temp salin sig chl DO DO% % -5 9,...

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Data Segmentation by proportion
hello you can use the attached function to detect positive and negative slope threshold crossing points this will give you th...

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Sound that covers a large frequency range.
hello you can record music / sound using your PC and a wave file editor like Goldwave. or use any music file that you already ...

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Audio Signal Processing in MATLAB (EQ and Delay)
hello bellow some code for EQ with digital filters : % % Cookbook formulae for audio EQ biquad filter coefficient...

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How to make an IIR filter for a speaker crossover without the toolbox
Not sure what you are really looking for, but this is a good starting point for audio EQ filters enjoy it ! % % Co...

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Designing a low pass differentiator using window technique
hello maybe this is waht you were looking for : function [dy, ddy] = firstsecondderivatives(x,y) % The function calculate...

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applying FFT on Pressure drop signals
hello FYI, this is my prefered fft subfunction , function [freq_vector,fft_spectrum] = myfft_peak(signal, Fs, nfft, Overl...

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How to create a sine wave with variable frequency - Simulink
hello if you have the frequency at each time step, you can also calculate the angular increment at each time step : d_theta = ...

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Amplitude spectrum concentrated around the wrong frequency
hello FYI, this is my fft code for doing averaging fft (works also for no averaging) : function [freq_vector,fft_spectrum...

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why wont text scan read all rows?
hello your last column has more than one word (2 or 3, so variable size) so with the given arguments txtscan can't read more ...

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Time Series with month names
hello Emily this is my suggestion , with two plot options filename = "Bottom Water Average DO Time Series.xlsx"; C = readce...

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imwrite error for saving contents of a cell array in a for loop - "colourmap should have 3 columns"?
hello Lydia I'm not an expert in image processing , but my lille modified code seems to work a few things I know : no need ...

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Combining multiple csv files in to one
hello this is an alternative that worked on my pc. There may be better coding options, I admit I had a bit of a hard time figu...

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Checking if my program calculates what is supposed to.
hello yes your code needed some fix at least I believe I have fixed most recurrence issues in the loop now there are other ...

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Inputting Power Spectral Density into System Transfer Function to obtain Output PSD
hello if your input PSD is a numerical vector defined for a frequency vector freq, you simply have to do dot products like thi...

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How to Design a lowpass filter by cascading 10 sections of the first-order IIR lowpass filter
hello yes , conv is doing what your professor is asking , but this is the right way to use it (on the num and den part of your...

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how can I cut a wav file, then put it back into folder back into a folder? Bad loop?
hello Morgan would suggest this code instead (also avoids doing audioread every time you loop ) filename=('C:\Users\....\.....

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