matlab cohere
时间: 2023-10-03 15:09:51 浏览: 42
Matlab cohere is a function used to compute the coherence between two signals. Coherence measures the degree of linear relationship between two signals in the frequency domain.
The syntax for the cohere function is:
[C,F] = cohere(x,y,window,noverlap,nfft,fs)
where:
- x and y are the input signals
- window is the window function applied to the signals before calculating the spectral density
- noverlap is the number of samples the windows overlap
- nfft is the number of points used in the FFT
- fs is the sampling frequency of the signals
The output of the cohere function is:
- C: the coherence between the two signals
- F: the frequency vector
The coherence values range from 0 to 1, where 0 indicates no correlation between the signals and 1 indicates perfect correlation. The cohere function is useful in signal processing and analysis, especially in fields such as biomedical engineering, where it is used to analyze the coherence between brain signals or between muscle signals.