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How to find out the amplitude and duration of a sine wave of different amplitudes?

@A Lumbini, If you must use wavelets, do a continuous wavelet transform (cwt). THe Matlab documentation is good. Make a 50 Hz s...

How to find out the amplitude and duration of a sine wave of different amplitudes?

@A Lumbini, If you must use wavelets, do a continuous wavelet transform (cwt). THe Matlab documentation is good. Make a 50 Hz s...

5 mois il y a | 0

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How to find out the amplitude and duration of a sine wave of different amplitudes?

@aswathy, @A Lumbini, I would not use wavelets. , I would use stft(). Make a signal which is 3 seconds long. The frequency is ...

How to find out the amplitude and duration of a sine wave of different amplitudes?

@aswathy, @A Lumbini, I would not use wavelets. , I would use stft(). Make a signal which is 3 seconds long. The frequency is ...

5 mois il y a | 0

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Which optimization tool should be used for solving my convex optimization problem?

@KAGANA SARATH, I agree with @Torsten: try fmincon. It allows you to specify linear and nonlinear equality constraints and ine...

Which optimization tool should be used for solving my convex optimization problem?

@KAGANA SARATH, I agree with @Torsten: try fmincon. It allows you to specify linear and nonlinear equality constraints and ine...

5 mois il y a | 0

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Plot the first-order autocorrelation functions for the following light sources: perfect monochromatic source, a thermal lamp((Lc=1 μm, a led =100 μm), lasersLc=1 m and 1 km

@OMEIR HUSSAIN, [Edit: fix spelling errors.] You can format your code as code, by highlighting your code, then click the "Code...

Plot the first-order autocorrelation functions for the following light sources: perfect monochromatic source, a thermal lamp((Lc=1 μm, a led =100 μm), lasersLc=1 m and 1 km

@OMEIR HUSSAIN, [Edit: fix spelling errors.] You can format your code as code, by highlighting your code, then click the "Code...

5 mois il y a | 0

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Box plot function help

@Benjamin Wilson, Others cannot run the code you supplied, since we don;t have singlepricingprogrammenew(), and I'm not suggest...

Box plot function help

@Benjamin Wilson, Others cannot run the code you supplied, since we don;t have singlepricingprogrammenew(), and I'm not suggest...

5 mois il y a | 0

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Sharpe ratio in Report

@jorge cogno, [edit: the 0 in the equation below is for the risk free rate] "RiskFreeRate=0 TotalReturn=0.22943, SharpeRatio=0...

Sharpe ratio in Report

@jorge cogno, [edit: the 0 in the equation below is for the risk free rate] "RiskFreeRate=0 TotalReturn=0.22943, SharpeRatio=0...

5 mois il y a | 0

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how can I create a simple clutter model?

@Kerem Yüksel, [edit: fix spelling errors] [Edit 2: My initial implementation had an exponential distribution of clutter radi...

how can I create a simple clutter model?

@Kerem Yüksel, [edit: fix spelling errors] [Edit 2: My initial implementation had an exponential distribution of clutter radi...

5 mois il y a | 0

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How do I find the most stable N consecutive numbers?

@Ali Almakhmari, How about this: x=rand(1,2500); n=50; stdx=zeros(1,length(x)-n+1); % allocate array for stdev(x(i:i+49)) f...

How do I find the most stable N consecutive numbers?

@Ali Almakhmari, How about this: x=rand(1,2500); n=50; stdx=zeros(1,length(x)-n+1); % allocate array for stdev(x(i:i+49)) f...

5 mois il y a | 0

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Comparing Finite difference method answer with analytical for 2d plate heat transfer

@Christopher, [Edit: add a line of code to display the maximum temperature for each value of N.] Another excellent answer fro...

Comparing Finite difference method answer with analytical for 2d plate heat transfer

@Christopher, [Edit: add a line of code to display the maximum temperature for each value of N.] Another excellent answer fro...

5 mois il y a | 0

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how to plot eigenvector calculated from eigs from the matrices created by freefem++

@AMIT, quiver() is good for 2-D vectors; quiver3() for 3D. For an example, I will use the magic square matrix, but I could us...

how to plot eigenvector calculated from eigs from the matrices created by freefem++

@AMIT, quiver() is good for 2-D vectors; quiver3() for 3D. For an example, I will use the magic square matrix, but I could us...

5 mois il y a | 0

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how get the range from FFT on FMCW radar data

@Simeon, You need to specify exactly what the signal that you have consists of. It could be the received signal mixed with a re...

how get the range from FFT on FMCW radar data

@Simeon, You need to specify exactly what the signal that you have consists of. It could be the received signal mixed with a re...

5 mois il y a | 0

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How to plot a linear function?

@Jenni, [edit: Fix typo: change "values at" to "values are"] It looks like you want to plot measured data as well as the best-...

How to plot a linear function?

@Jenni, [edit: Fix typo: change "values at" to "values are"] It looks like you want to plot measured data as well as the best-...

5 mois il y a | 0

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Why the calculated phase differs so much from the real phase of the signal?

@Janko, The DFT expresses a signal x(k) as a sum of sinusoids, each of which is sampled at regular intervals. The phase angles...

Why the calculated phase differs so much from the real phase of the signal?

@Janko, The DFT expresses a signal x(k) as a sum of sinusoids, each of which is sampled at regular intervals. The phase angles...

6 mois il y a | 2

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Create a node in the space between two nodes (A and B) and following the direction normal to a node (N)

@Alberto Acri D=(A+B)/2; % the location E=cross((A-B),(N-D)); % the direction good luck

Create a node in the space between two nodes (A and B) and following the direction normal to a node (N)

@Alberto Acri D=(A+B)/2; % the location E=cross((A-B),(N-D)); % the direction good luck

6 mois il y a | 0

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How to solve this function?

@Ramesh, I am not sure what you mean by "how do you solve this function". You have posted a function. par=struct('A',1,'E',2,...

How to solve this function?

@Ramesh, I am not sure what you mean by "how do you solve this function". You have posted a function. par=struct('A',1,'E',2,...

6 mois il y a | 0

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Solving 2d heat problem using meshgrid

@Ali, [edit: fix spelling erors] A 10x10 mesh for this problem is so few points that it makes it hard to set up the problem an...

Solving 2d heat problem using meshgrid

@Ali, [edit: fix spelling erors] A 10x10 mesh for this problem is so few points that it makes it hard to set up the problem an...

6 mois il y a | 0

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How to reduce \t commands

@TheSaint, Hard to say, since we don't know what F and SC and E are. You use the word table. Have you used Matlab's T=table...

How to reduce \t commands

@TheSaint, Hard to say, since we don't know what F and SC and E are. You use the word table. Have you used Matlab's T=table...

6 mois il y a | 0

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Advice on formulating a minimization function

@Collin Pecora, If you want to use multiple sources of data, with different levels of measurement error, to estimate parameters...

Advice on formulating a minimization function

@Collin Pecora, If you want to use multiple sources of data, with different levels of measurement error, to estimate parameters...

6 mois il y a | 0

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looped 3D FFT of 4D data

@sbr, P2 is 64x64x64. P1 is 1x33. Your plot shows that one column along one corner-edge of the cube P2 is zero. But P2 is not...

looped 3D FFT of 4D data

@sbr, P2 is 64x64x64. P1 is 1x33. Your plot shows that one column along one corner-edge of the cube P2 is zero. But P2 is not...

6 mois il y a | 0

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Plot a Probability Density Function in 3D

@Victor Carneiro da Cunha Martorelli, For a one-dimensional random variable, you could do the Kolmogorov-Smirnov test, or the A...

Plot a Probability Density Function in 3D

@Victor Carneiro da Cunha Martorelli, For a one-dimensional random variable, you could do the Kolmogorov-Smirnov test, or the A...

6 mois il y a | 0

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Detect boundaries seperating data blocks in a time series signal

@Ashley, I am actually very impressed that findchangepts() did so well. I recommend adjusting the optional arguments of findch...

Detect boundaries seperating data blocks in a time series signal

@Ashley, I am actually very impressed that findchangepts() did so well. I recommend adjusting the optional arguments of findch...

6 mois il y a | 0

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How to get the value of X-axis at the -3dB

@Chris, There is no guarantee that H(f) will = -3 dB at one of the frequencies at which you evaluate H(f). Therefore, since it ...

How to get the value of X-axis at the -3dB

@Chris, There is no guarantee that H(f) will = -3 dB at one of the frequencies at which you evaluate H(f). Therefore, since it ...

6 mois il y a | 1

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Special case of spectrogram not match FFT

@John, There are many ways to normalize a spectrum. Mathematicians like to have a factor 1/sqrt(n) in the forward and reverse ...

Special case of spectrogram not match FFT

@John, There are many ways to normalize a spectrum. Mathematicians like to have a factor 1/sqrt(n) in the forward and reverse ...

6 mois il y a | 0

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Fourier transform spatial domain-DSP

@Nimasha Pilippange, Matlab's fft() will work fine on spatial data. The only difference is in the interpretation of the transf...

Fourier transform spatial domain-DSP

@Nimasha Pilippange, Matlab's fft() will work fine on spatial data. The only difference is in the interpretation of the transf...

6 mois il y a | 0

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two signal one is original signal i.e. pulses and other is receiving signal with a noise. finding the delay in signal by using the cross correlation.

@Mahesh, The error above occurs if you pass a non-integer scalar value for receiver_signal, because a scalar is interpreted as...

two signal one is original signal i.e. pulses and other is receiving signal with a noise. finding the delay in signal by using the cross correlation.

@Mahesh, The error above occurs if you pass a non-integer scalar value for receiver_signal, because a scalar is interpreted as...

6 mois il y a | 0

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How to find fitting optimized parameters to fit a system of non-linear ODEs to experiment.

@Buhari Ibrahim Matlab has excellent tools for this. https://www.mathworks.com/help/optim/ug/optimizing-a-simulation-or-ordina...

How to find fitting optimized parameters to fit a system of non-linear ODEs to experiment.

@Buhari Ibrahim Matlab has excellent tools for this. https://www.mathworks.com/help/optim/ug/optimizing-a-simulation-or-ordina...

6 mois il y a | 2

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How to delete or exclude an entire matrix if it contains all zeros

@Caitlin, you'll have to be more specific about how you are reading in the data in order to get a useful answer. X=zeros(10,10)...

How to delete or exclude an entire matrix if it contains all zeros

@Caitlin, you'll have to be more specific about how you are reading in the data in order to get a useful answer. X=zeros(10,10)...

6 mois il y a | 0

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Huge inaccuracies in plotting diode IV characteristic in Matlab

@Nicholas, It is clear that your model does not fit your data. So there has been an error in the data collection, or the mdoe...

Huge inaccuracies in plotting diode IV characteristic in Matlab

@Nicholas, It is clear that your model does not fit your data. So there has been an error in the data collection, or the mdoe...

6 mois il y a | 1

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Adjusting Parameters in Transcranial Doppler Audio Processing: Seeking Guidance on Gain, SWEEP, and Audio Playback

@Patrícia, For colors, you can specify a colormap that gives colors more like what you want. See here, and scroll down to see ...

Adjusting Parameters in Transcranial Doppler Audio Processing: Seeking Guidance on Gain, SWEEP, and Audio Playback

@Patrícia, For colors, you can specify a colormap that gives colors more like what you want. See here, and scroll down to see ...

6 mois il y a | 0

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Inconsistency between Matlab eig() function and Matlab generated C code eig() function

@Hugoz, I am not sure how you generated the C code, but I suspect the C code is wrong. Matlab's eig() is extremely well tested...

Inconsistency between Matlab eig() function and Matlab generated C code eig() function

@Hugoz, I am not sure how you generated the C code, but I suspect the C code is wrong. Matlab's eig() is extremely well tested...

6 mois il y a | 0