Answered

Playing sound using 4 channels or converting 4 channels to two

Hello Alex seems to me that none of your codes does actually mix the two songs, here you simply create a 4 channels audio fro...

Playing sound using 4 channels or converting 4 channels to two

Hello Alex seems to me that none of your codes does actually mix the two songs, here you simply create a 4 channels audio fro...

25 días ago | 0

| accepted

Answered

how to control amplitude of step in code

hello simply multiply the result of the (normalized) step (input amplitude = 1) by the actual / desired input amplitude inp...

how to control amplitude of step in code

hello simply multiply the result of the (normalized) step (input amplitude = 1) by the actual / desired input amplitude inp...

25 días ago | 0

Answered

how to calculate RMS of excel sheet having multiple channel

hello see demo code below with attached excel file I assumed the data are column oriented the rms values are stored in arr...

how to calculate RMS of excel sheet having multiple channel

hello see demo code below with attached excel file I assumed the data are column oriented the rms values are stored in arr...

alrededor de 1 mes ago | 0

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Answered

Define main frequencies of accelerometer signals

hello Sergio if you are interested in the low frequency range , my liitle code can help you the quantization noise is quit...

Define main frequencies of accelerometer signals

hello Sergio if you are interested in the low frequency range , my liitle code can help you the quantization noise is quit...

alrededor de 1 mes ago | 0

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Answered

how to generate the fowlloing data file based on the original data format?

hellooo and welcome back !! I think I recognize a bit this code .... see my little mods below : clc clearvars S = dir(...

how to generate the fowlloing data file based on the original data format?

hellooo and welcome back !! I think I recognize a bit this code .... see my little mods below : clc clearvars S = dir(...

alrededor de 1 mes ago | 0

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Answered

I'm starting in Matlab and I have to code centred loops spreading in different directions. Just like the picture I added. Any guidance on where to start would be appreciated.

hello try this circles_radius = 1; radius_noise_amplitude = 0.05; center_radius = 2; center_radius_noise_amplit...

I'm starting in Matlab and I have to code centred loops spreading in different directions. Just like the picture I added. Any guidance on where to start would be appreciated.

hello try this circles_radius = 1; radius_noise_amplitude = 0.05; center_radius = 2; center_radius_noise_amplit...

alrededor de 1 mes ago | 0

Answered

How to create linear phase filters for filter bank?

hello the phase roll rate must be constant like in the example below %% define filters fs = 10000; freq = linspace(100,(f...

How to create linear phase filters for filter bank?

hello the phase roll rate must be constant like in the example below %% define filters fs = 10000; freq = linspace(100,(f...

alrededor de 1 mes ago | 0

Answered

Remove simultaneously several substrings in a string

hello try this A = "159 (51,1%) 13 (4,2%) 139 (44,7%)"; B = split(A,' '); B(contains(B,'(')) = []; B = join(B,' ');

Remove simultaneously several substrings in a string

hello try this A = "159 (51,1%) 13 (4,2%) 139 (44,7%)"; B = split(A,' '); B(contains(B,'(')) = []; B = join(B,' ');

alrededor de 1 mes ago | 0

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Answered

using logical indexing to find events

hello there is a very simple answer using interp1 t=0:0.01:10; x=sin(2*pi*t)+t/10; y=sin(2*pi*t+pi/4); tevent=[5.3,3.2,8.7,...

using logical indexing to find events

hello there is a very simple answer using interp1 t=0:0.01:10; x=sin(2*pi*t)+t/10; y=sin(2*pi*t+pi/4); tevent=[5.3,3.2,8.7,...

alrededor de 1 mes ago | 1

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Answered

Trouble fitting a curve using polyfit and polyval

hello see example below : clc clearvars % data x = (0:100); b = 1.5; a = 2.35; y = a + b*x + 3*randn(size(x)); %...

Trouble fitting a curve using polyfit and polyval

hello see example below : clc clearvars % data x = (0:100); b = 1.5; a = 2.35; y = a + b*x + 3*randn(size(x)); %...

alrededor de 1 mes ago | 0

Answered

Plotting only few indices over time series

hello my 2 cents suggestion : n = 1:500; x = n.*(1+rand(size(n))); ind = [28,300,349,388,389]; plot(n,x,'b',n(ind),x(in...

Plotting only few indices over time series

hello my 2 cents suggestion : n = 1:500; x = n.*(1+rand(size(n))); ind = [28,300,349,388,389]; plot(n,x,'b',n(ind),x(in...

alrededor de 1 mes ago | 0

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Answered

How to make a piecewise function without using syms?

hello Brianna try this (using logical arrays) n = 0:20; x = zeros(size(n)); % cond 3 by default % cond 1 ind1 = (0<=n & n...

How to make a piecewise function without using syms?

hello Brianna try this (using logical arrays) n = 0:20; x = zeros(size(n)); % cond 3 by default % cond 1 ind1 = (0<=n & n...

alrededor de 1 mes ago | 0

Answered

Comparing curves to an original signal

hello again so the yellow curve can be shifted to match the purple one by using a linear equation like y2_shifted = = y2*a+...

Comparing curves to an original signal

hello again so the yellow curve can be shifted to match the purple one by using a linear equation like y2_shifted = = y2*a+...

alrededor de 1 mes ago | 0

Answered

How to get polynomial equation of polyfit?

hello my suggestion below : the equation is given by the string eqn code : clc; clear; y = [4.0432,4.1073,4.0899,4....

How to get polynomial equation of polyfit?

hello my suggestion below : the equation is given by the string eqn code : clc; clear; y = [4.0432,4.1073,4.0899,4....

alrededor de 2 meses ago | 1

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Answered

How can I find the Transfer Function having Magnitude(dB), Phase(degree) and Frequency(Hz)?

hello I tried a few options , IIR or FIR filters fit. As the phase plot shows , there is a quite significant phase roll rate...

How can I find the Transfer Function having Magnitude(dB), Phase(degree) and Frequency(Hz)?

hello I tried a few options , IIR or FIR filters fit. As the phase plot shows , there is a quite significant phase roll rate...

alrededor de 2 meses ago | 1

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Answered

Perform cross co-relation to find best fit

hello the two signals have a slightly (but constant) slopes , so the best estimation of time delta is measured at half the amp...

Perform cross co-relation to find best fit

hello the two signals have a slightly (but constant) slopes , so the best estimation of time delta is measured at half the amp...

alrededor de 2 meses ago | 0

Answered

Creating events from continuous data

hello I took only the central portion of your code and applied my recipe - see below had to do some preliminary data process...

Creating events from continuous data

hello I took only the central portion of your code and applied my recipe - see below had to do some preliminary data process...

alrededor de 2 meses ago | 0

Answered

How to generate barplot like this on a given data?

hello example of horizontal bar plot clc clearvars close all data_co2 = [.142 .156 .191 .251 0.5 0.86 2.2 4 8.3]; data...

How to generate barplot like this on a given data?

hello example of horizontal bar plot clc clearvars close all data_co2 = [.142 .156 .191 .251 0.5 0.86 2.2 4 8.3]; data...

alrededor de 2 meses ago | 0

Answered

How to write a function that implements an LTI filter using Direct Form 2?

hello see my example below %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % load signal %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% data ...

How to write a function that implements an LTI filter using Direct Form 2?

hello see my example below %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % load signal %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% data ...

alrededor de 2 meses ago | 0

Answered

Filtering noise from an audio signal

hello my recommendation : define the filters after you have analysed the data (see the spectrogram plot : most of the noise en...

Filtering noise from an audio signal

hello my recommendation : define the filters after you have analysed the data (see the spectrogram plot : most of the noise en...

alrededor de 2 meses ago | 0

Answered

Access data from table element

hello Giulia try this clc clearvars s = dir('00*.txt') numfiles = numel(s); for n=1:numfiles filename = s(n).nam...

Access data from table element

hello Giulia try this clc clearvars s = dir('00*.txt') numfiles = numel(s); for n=1:numfiles filename = s(n).nam...

alrededor de 2 meses ago | 0

Answered

Not sure whats wrong with the values in this plot

hello Seb I revisited your code and found the main bug . In your equations the term that computes the rotor acceleration ( = n...

Not sure whats wrong with the values in this plot

hello Seb I revisited your code and found the main bug . In your equations the term that computes the rotor acceleration ( = n...

alrededor de 2 meses ago | 2

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Answered

i have a code for a .wav file which then outputs 3 graphs, but now i want to edit the code and apply three filters (LPF,HPF,BPF) how can i do that and also output the TF?

hello again this is the code with the FIR filters implemented hope it helps ! % LPF cutoff frequency 3 KHz % BPF cutof...

i have a code for a .wav file which then outputs 3 graphs, but now i want to edit the code and apply three filters (LPF,HPF,BPF) how can i do that and also output the TF?

hello again this is the code with the FIR filters implemented hope it helps ! % LPF cutoff frequency 3 KHz % BPF cutof...

alrededor de 2 meses ago | 0

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Answered

Intersection between fittetfunction and line

hello Luis so this my little demo for intersection - the crossing point coordinates are obtained by linear interpolation, so t...

Intersection between fittetfunction and line

hello Luis so this my little demo for intersection - the crossing point coordinates are obtained by linear interpolation, so t...

alrededor de 2 meses ago | 1

| accepted

Answered

Filtering out noise or eigenfrequency in acceleration data

hello Lisa do not be desperate ! we are here to help I used your data in my favourite code for noise and vibration analysis....

Filtering out noise or eigenfrequency in acceleration data

hello Lisa do not be desperate ! we are here to help I used your data in my favourite code for noise and vibration analysis....

alrededor de 2 meses ago | 0

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Answered

How to export .mat file to excel different sheets

hello yes , like this : MAT = rand(10,100); [m,n] = size(MAT); for ci = 1:n xlswrite('sampleData.xlsx', MAT(:,ci),...

How to export .mat file to excel different sheets

hello yes , like this : MAT = rand(10,100); [m,n] = size(MAT); for ci = 1:n xlswrite('sampleData.xlsx', MAT(:,ci),...

alrededor de 2 meses ago | 0

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Answered

How to perform calc. on the selected part of curve and then reassemble it with rest part of curve in MATLAB?

hello see my little demo below I extracted the portion of data of interest - you can do computation or smoothing and put bac...

How to perform calc. on the selected part of curve and then reassemble it with rest part of curve in MATLAB?

hello see my little demo below I extracted the portion of data of interest - you can do computation or smoothing and put bac...

alrededor de 2 meses ago | 1

| accepted

Answered

Unsure of what is happening in for loop

hello I don't get why the while loop is for ? The for loop by itself will generate this result delta1 = -0.7151 -...

Unsure of what is happening in for loop

hello I don't get why the while loop is for ? The for loop by itself will generate this result delta1 = -0.7151 -...

alrededor de 2 meses ago | 0

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Answered

Using a filter difference equation in a for loop to filter a .wav file within the loop

hello see example below - notice b are usually coeffcient names for numerator so they are used for the x (input) , wheras a co...

Using a filter difference equation in a for loop to filter a .wav file within the loop

hello see example below - notice b are usually coeffcient names for numerator so they are used for the x (input) , wheras a co...

alrededor de 2 meses ago | 0

Answered

Help fixing code to do loop aswell as how to show start/end times of spike as seen on plot.

hello Erick I have implemented a new portion of code to define the two crossing points with maximal time accuracy (by linear i...

Help fixing code to do loop aswell as how to show start/end times of spike as seen on plot.

hello Erick I have implemented a new portion of code to define the two crossing points with maximal time accuracy (by linear i...

alrededor de 2 meses ago | 0