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William Rose


Active since 2007

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Answered
Plot: How to reflect a curve and multiply by another curve to produce 3d plot.
@Anand Rathnam, You said you imagine a cylinder. That suggests you want to rotate the reflected 2D curve about its middle. Is...

6 Tage ago | 0

| accepted

Answered
How can I replicate this plot using these differential equations and parameters?
@faraz khan, @Torsten is exactly correct, as usual. But since you are still stuck, here's some additional help. Define a sta...

7 Tage ago | 1

| accepted

Answered
The difference of SSE and MAE curve fitting and optimization
@Shaily_T, In most curve-fitting problems, you will not see a big difference when you minimize SSE versus minmize sum of absolu...

7 Tage ago | 0

| accepted

Answered
How to plot an x value using for loop from an input?
@Hunter Nau, You are plotting each point of the descent as a separate series, which is why you cannot connect them. This also m...

7 Tage ago | 0

Answered
Need help with this question please
@Roy Pearson, You included a script, broken into overlapping parts. The script has missing parts, for example in lines 9-11, 1...

7 Tage ago | 0

Answered
How to create and use transfer function for multi input multi output systems
@Osman Mert, I do not understand what kind of transfer funciton you want to create. Is a transfer function (as you intend the ...

8 Tage ago | 0

Answered
ecoacoustics - acoustic indices
@Christine, I don;t think this exists in Matlab - you will have to write it. The acoustics toolbox info is here. There do not ...

8 Tage ago | 0

Answered
plotting signals in frequency domain
@Sadi M Jawad Ahsan, Here is an example of what I was saying in my previous answer. Note that I define a vector of time values ...

8 Tage ago | 0

| accepted

Answered
plotting signals in frequency domain
@Sadi M Jawad Ahsan, [correcting my spelling mstakes] You have made an excellent start on the problem. I do not understand yo...

8 Tage ago | 0

Answered
How to present the determinant and eigenvalue using FprintF function
@Jonas Morgner, You can display the symbolic d2 and d3 using fprintf() as shown below. Note that d2 is a string variable, so I...

8 Tage ago | 0

| accepted

Answered
How can I obtain the eigenvector from a matrix?
[V,D]=eig([7,3;3,-1]) V is the vector of eigenvectors and D is the diagonal matrix of eigenvalues.

8 Tage ago | 0

Answered
how to plot ellipse around poincare map of RR intervals
@Dominik Smolinsky, Here is code that draws an ellipse that is designed to capture 95% of the data points. By adjusting a valu...

25 Tage ago | 0

Answered
How can I write this in MatLab?
@Hunter Manning, N=10000; T=501; %number of particles and times a=0.1; %amplitude of each step (+ or -) x=ze...

26 Tage ago | 0

Answered
Solving second order non-linear partial differential in three independent variables
@Mahesh Nallamothu, An analytical solution exists: Consider a solution which is independent of z and . In other words, T(r)...

26 Tage ago | 0

Answered
Solving second order non-linear partial differential in three independent variables
@Mahesh Nallamothu, Yes you can. [Editing because I made a mistake in analyzing your postiing.] Matlab's PDE toolbox is very p...

27 Tage ago | 0

Answered
i have 3 matrices the first one is 3x3 the second is 1x3 the third is 3x2 and i want to build new matrix using the 1st raw of the 1st and the second row of 2nd he 2nd
@fatima haydar ahmad, You wrote: "i have 3 matrices the first one is 3x3 the second is 1x3 the third is 3x2 and i want to buil...

29 Tage ago | 0

Answered
Extracting Audio File Frequency
@mehtap agirsoy, I wrote a script that extract 3 seconds of sound from each vocalization. As I said before,the times of note-s...

etwa ein Monat ago | 0

Answered
Extracting Audio File Frequency
@mehtap agirsoy, I have listened to file A1.wav. The instances of singing are not at 15 second intervals, even though this is ...

etwa ein Monat ago | 0

| accepted

Answered
Extracting Audio File Frequency
@mehtap agirsoy, Middle C! The frequency sweep in my code goes from A3 to A5.

etwa ein Monat ago | 0

Answered
Extracting Audio File Frequency
@mehtap agirsoy, [moved my answer from a comment to an answer] The google drive link you provided requres access permission. ...

etwa ein Monat ago | 0

Answered
Anderson Darling Goodness-of-the-fit test?
@Ines, @Debbie Green, Calculating the AD statistic is straightforward, and the attached function does it. Figuring out the p-v...

etwa ein Monat ago | 3

Answered
How to remove a range of frequencies from a time series using the Lanczos filter?
@Tracka Lowd, I recommend using the day as the unit of time. A three day time scale corresponds to a frequency of (1/3) per da...

etwa ein Monat ago | 2

Answered
Solving a System of 2nd Order Nonlinear ODEs
@mpz, Please show how you converted the two differential equations, labeleled "7" and "8" in your figure, to a set of first ord...

etwa ein Monat ago | 1

Answered
How could I implement a CFAR threshold in analyzing a time-frequency decomposed signal plus AWGN?
@Maximiliano Barbosa, The plots appear to be made with stft(). The SNR appears to be lower in the second plot. The vertical a...

etwa ein Monat ago | 0

| accepted

Answered
I'm trying to get my code to run some iterations to calculate different combinations. It needs to run every combination of height and diameter for all angles
@Tapuwa Shambira, Is this function called by another script? If so, give an example. You said the function creates a figure. ...

etwa ein Monat ago | 0

Answered
How can I create a 3kHz brickwall filter to filter "movieaudio.wav" (human voice audio) that has a corrupting 8kHz tone. Comments on the code explain what I am trying to do.
@Roberto Santana, [edit: correct spelling errors] I understand that you were trying to create an approximation of an ideal low...

etwa ein Monat ago | 0

| accepted

Answered
How can I create a 3kHz brickwall filter to filter "movieaudio.wav" (human voice audio) that has a corrupting 8kHz tone. Comments on the code explain what I am trying to do.
@Roberto Santana, please post a sample .wav file with the 8 kHz tone. The file size will not be too large since it is just 4-5 ...

etwa ein Monat ago | 0

Answered
How to curve fit using two functions in two different data segment
@aroj bhattarai, Yes, it is possible and not too difficult. YOu just need to write the error function, or cost function, appro...

etwa ein Monat ago | 0

Answered
How can I generate an analytical flow field for poiseuille flow including a time dependent flow solution?
@Abhisheik Chanda, @Torsten did not follow up, because he asked for the equations, and you did not provide actual equations. W...

etwa 2 Monate ago | 0

Answered
How to sort eigenvalues when performing generalized nyquist criterion on 2x2 matrix?
@Merve Can I downloaded your code and ran it. It runs fine. The image generated is too large to fit on my small screen. You ...

etwa 2 Monate ago | 0

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