Psuedospectrum using the eigenvector method.
[S,w] = peig(x,p) -[S,w] = peig(x,p,w) -[S,w] = peig(x,p,nfft) -[S,w] = peig(x,p,nfft,fs) -[S,w] = peig(x,p,f,fs) -[S,f] = peig(...,'corr') -[S,f] = peig(x,p,nfft,fs,nwin,noverlap) -[...] = peig(...,freqrange) -[...,v,e] = peig(...) - -Parameters: -x - int|double - vector|matrix -Input signal. In case of a matrix, each row of x represents a -seperate observation of the signal. If 'corr' flag is specified, -then x is the correlation matrix. -If w is not specified in the input, it is determined by the -algorithm. If x is real valued, then range of w is [0, pi]. -Otherwise, the range of w is [0, 2pi) -p - int|double - scalar|vector -p(1) is the dimension of the signal subspace -p(2), if specified, represents a threshold that is multiplied by -the smallest estimated eigenvalue of the signal's correlation matrix. -w - int|double - vector -w is the vector of normalized frequencies over which the -pseuspectrogram is to be computed. -nfft - int - scalar (Default = 256) -Length of the fft used to compute pseudospectrum. The length of S -(and hence w/f) depends on the type of values in x and nfft. -If x is real, length of s is (nfft/2 + 1) {Range of w = [0, pi]} if -nfft is even and (nfft+1)/2 {Range of w = [0, pi)} otherwise. -If x is complex, length of s is nfft. -fs - int|double - scalar (Default = 1) -Sampling rate. Used to convert the normalized frequencies (w) to -actual values (f) and vice-versa. -nwin - int|double - scalar (int only)|vector (Default = 2*p(1)) -If nwin is scalar, it is the length of the rectangular window. -Otherwise, the vector input is considered as the window coefficients. -Not used if 'corr' flag present. -If x is a vector, windowing not done in nwin in scalar. If x is a -matrix, -noverlap - int - scalar (Default = nwin-1) -number of points by which successive windows overlap. noverlap not -used if x is a matrix -freqrange - string -The range of frequencies over which the pseudospetrogram is -computed. Three possible values - 'onesided', 'twosided', 'centered' -'corr' flag -Presence indicates that the primary input x is actually a -correlation matrix - -Examples: -TODO: