How the value being calculated for "widths" and "proms" in Peak Prominences?

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Matlaber 2019-1-9

编辑： Matlaber 2019-1-14

I am wondering how the value being calculated for "widths" and "proms" in Peak Prominences?

I am following "Peak Prominences".

[pks,locs,widths,proms] = findpeaks(PeakSig,x); 
widths
proms

widths

widths = 1×6

0.0154 0.0431 0.0377 0.0625 0.0274 0.0409

Why there is 6 value generated while only 2 peak (2 width) detected?

It same with proms:

proms

proms = 1×6

2.6816 5.5773 3.1448 4.4171 2.9191 3.6363

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