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Jeremy


Westinghouse Electric

Last seen: 2 månader ago |  Active since 2012

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Question


uiresume not working in function.
I was updating an old GUIDE figure to the new format and cannot get a uiwait / uiresume to work inside the function. I can boil...

mer än ett år ago | 1 answer | 0

1

answer

Answered
Different output from pwelch and my own implementation of welch
At first glance the blue line looks like the square of the purple line. Looking at your code confirms this, pwelch is calculati...

nästan 8 år ago | 0

Answered
Question about PSD calculation using FFT
The fft results in a spectra that includes positive and negative frequencies. Don't ask me to explain what a negative frequency...

mer än 8 år ago | 0

| accepted

Answered
How to compute fft of the rat's licking time?
There has to be good a joke there somewhere... So your data is a set of timestamps when rat licks? Is this coming from a pr...

mer än 8 år ago | 0

Answered
-6211 DDC_StorageCouldNotBeOpened
I am actually running into a very similar issue. I have some TDMS files that can be opened, some others (usually longer files) ...

ungefär 9 år ago | 0

Answered
Analyzing landsurface using FFT
If you have a data point every meter, then that is your "sampling rate", 1 sample/meter. Your fft will result in frequency bins...

mer än 9 år ago | 0

Answered
Create an empty array of size (MxN) for xlswrite.
If you are writing to excel then you probably want to use a cell array, Array = cell(2592,2);

mer än 9 år ago | 0

Answered
How can I import an excel workbook's SHEET TITLE?
use the xlsfinfo function to read the names of all the sheets in an excel file.

mer än 9 år ago | 0

Answered
How to create a band pass filter
you discuss a bandpass filter but you are applying a lowpass filter... Aside from that, the order really depends on what type...

mer än 9 år ago | 0

| accepted

Answered
In regards to finding phase difference using matlab inbuilt cpsd function.
angle(Pxy) is the correct way to do this. The phase of the cross spectra is looking at the difference between the channels so t...

mer än 9 år ago | 0

Answered
Power Spectral Density Estimates Using FFT
There are different ways of looking at it but the PSD is often written as: (fft*conj(fft))/(bin_width*NFFT^2) (fft*conj(ff...

mer än 9 år ago | 1

Answered
Power spectral density of gaussian white noise
The "density" in PSD means that the power is normalized to something, usually 1 Hz, but in this case it is the Nyquist frequewn...

mer än 9 år ago | 1

Answered
RMS power in signal: time series vs frequency series. PSD/RMS definition?
Your equations are a little muddled, and there are three basic errors. # There is a factor of 2 on the your fft result, I ass...

mer än 9 år ago | 0

Answered
How to get 2nd minimun value from matrix?
It is a little cumbersome but for any array x, this should work: min(x(x~=min(x(:))))

nästan 10 år ago | 1

Answered
Problem in opening HDF5 file
after to get hinfo, stop and see what is in that structure. It will list the group and dataset hiearchy.

nästan 10 år ago | 0

Answered
Problem in opening HDF5 file
what is returned by hinfo? do you have 2 groups with a data channel in the second group?

nästan 10 år ago | 0

Answered
How can I filter white noise to obtain signal with desired PSD?
If you randomize the phases you will end up with a Gaussian distribution because the magnitude at every point will be a random c...

nästan 10 år ago | 0

Answered
How can I filter white noise to obtain signal with desired PSD?
you are trying to generate a time history with a specified spectral content, such that a PSD from the output will match the init...

nästan 10 år ago | 0

Answered
initial phase angle calculation
You can't expect them to be zero degrees just because there is no signal defined there. With no content at those frequencies, ...

nästan 10 år ago | 0

Answered
initial phase angle calculation
I ran your code it and seems to be working as-is. -30 and -90 deg at 10 and 50Hz

nästan 10 år ago | 0

| accepted

Answered
Calculate an Input Signal using tfestimate, FFT and IFFT
I recently went through a similar exercise and so I can provide some answers.. _1. Is it possible to calculate the Transfer ...

nästan 10 år ago | 1

Answered
Compress only selected variables when saving to .mat
I know this is old, but I have been doing some similar work recently since I could tell it was taking longer than it should to l...

nästan 10 år ago | 0

Answered
How does Vrms of raw noise signal compare to power spectral density?
The square root of the integral of the PSD will equal the rms amplitude of the original time history. The integral of the PSD i...

nästan 10 år ago | 0

Question


Enlarged windows text size wrecking havoc on my GUI.
I have fairly complex signal processing GUI that is used within my company and I had issue with one user and I finally figured o...

nästan 10 år ago | 0 answers | 0

0

answers

Answered
Plot a line over spectrogram
I've done this before, I believe the trick is to set the Z-value for your line so that is always above the spectrogram.

nästan 11 år ago | 0

| accepted

Answered
Is it possible to do multidimensional interpolation on a set of scattered data?
For 2 dimensional data (surface of scattered points), I've found <http://www.mathworks.com/matlabcentral/fileexchange/8998-surfa...

ungefär 11 år ago | 1

Answered
detect square objects in a binary image
I was thinking about this recently, a hough transform could be a very robust way to find squares, if they are not rotated at all...

ungefär 11 år ago | 0

Question


Is the new splash screen option in the compiler just for the installer?
Or does it show up each time the exe is launched while the MCR is loading? I'm currently setting up wrapper applications so a s...

ungefär 11 år ago | 1 answer | 0

1

answer

Answered
How did you learn MATLAB?
I have always dabbled in programming since I was 13, but never really got deep in any one language. As a mechanical engineer no...

ungefär 11 år ago | 0

Question


Is there a way to restrict the MCR Version used for compiled code?
Is there any way to restrict which version of the MCR can be used to launch compiled code? The project I am working on involves...

ungefär 11 år ago | 1 answer | 0

1

answer

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