FINDPEAKS - matlab函数

2023-11-08 10:48•php•阅读 2920

FINDPEAKS Find local peaks in data

PKS = FINDPEAKS(X) finds local peaks in the data vector X. A local peak

is defined as a data sample which is either larger than the two

neighboring samples or is equal to Inf.

[PKS,LOCS]= FINDPEAKS(X) also returns the indices LOCS at which the

peaks occur.

[...] = FINDPEAKS(X,\'MINPEAKHEIGHT\',MPH) finds only those peaks that

are greater than MINPEAKHEIGHT MPH. Specifying a minimum peak height

may help in reducing the processing time. MPH is a real valued scalar.

The default value of MPH is -Inf.

[...] = FINDPEAKS(X,\'MINPEAKDISTANCE\',MPD) finds peaks that are at

least separated by MINPEAKDISTANCE MPD. MPD is a positive integer

valued scalar. This parameter may be specified to ignore smaller peaks

that may occur in close proximity to a large local peak. For example,

if a large local peak occurs at index N, then all smaller peaks in the

range (N-MPD, N+MPD) are ignored. If not specified, MPD is assigned a

value of one.

[...] = FINDPEAKS(X,\'THRESHOLD\',TH)finds peaks that are at least

greater than their neighbors by the THRESHOLD TH. TH is real valued

scalar greater than or equal to zero. The default value of TH is zero.

[...] = FINDPEAKS(X,\'NPEAKS\',NP) specifies the maximum number of peaks

to be found. NP is an integer greater than zero. If not specified, all

peaks are returned.

[...] = FINDPEAKS(X,\'SORTSTR\',STR) specifies the direction of sorting

of peaks. STR can take values of \'ascend\',\'descend\' or \'none\'. If not

specified, STR takes the value of \'none\' and the peaks are returned in

the order of their occurrence.