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FFT Amplitude and FFT Normalization
Hello, I have 2 questions: 1) what's the (physical) meaning of the Y-axis in an FFT vs. Frequency plot? (I mean usually I plot ...
quasi 10 anni fa | 1 risposta | 0
1
rispostaDomanda
How to extract data from image figure?
Hello, I am using "imcontrast" to adjust contrast of figure. Then I press "adjust data". Now, my question is, how can I get a ...
quasi 10 anni fa | 2 risposte | 0
2
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audio recording - synchronous execution
Hello, I want to record audio from laptop's microphone and simultaneously "hit" play on some other non-matlab application. ...
circa 10 anni fa | 1 risposta | 0
1
rispostaDomanda
VideoReader - cropped frame
Hello, I'm using VideoReader to import *.avi file to Matlab. My original file is quite large, it's 480x480 pixels, 24 bit...
circa 10 anni fa | 1 risposta | 1
1
rispostaDomanda
fft2 - how does it work
Hello, I am trying to understand how fft2 works and what it really means by simple example - my image is black&white stripes:...
circa 10 anni fa | 1 risposta | 0
1
rispostaDomanda
Neural Network - Pattern recognition network
Hello, I have NN for Pattern recognition. I use the function "patternnet". My question is, if I train my net with 3 different ...
circa 10 anni fa | 1 risposta | 0
1
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Distinguish between 2 variables using PCA
Hello, I am trying to understand the PCA function. I have 6 recordings of Heart Rate. Four of them from person A, and two of t...
circa 10 anni fa | 1 risposta | 0
1
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how to know the frequency on the fft plot
if I'm doing fft of my signal, and ploting it plot(abs(fft(x)). Now how do I match an index on the graph to a specific fr...
circa 10 anni fa | 1 risposta | 0
1
rispostaDomanda
Why should I use 2 fftshift?
Hello if I have signal x (in time domain). I saw that sometimes people do fftshift(fft(ffshift(x))). Now, I understand the u...
circa 10 anni fa | 1 risposta | 0
