| find_peaks {photobiology} | R Documentation |
This function finds all peaks (local maxima) in a spectrum, using a user selectable size threshold relative to the tallest peak (global maximum). This a wrapper built on top of function peaks from package splus2R.
find_peaks(x, ignore_threshold = 0, span = 3, strict = TRUE, na.rm = FALSE)
x |
numeric vector |
ignore_threshold |
numeric value between 0.0 and 1.0 indicating the size threshold below which peaks will be ignored. |
span |
a peak is defined as an element in a sequence which is greater than all other elements within a window of width span centered at that element. The default value is 3, meaning that a peak is bigger than both of its neighbors. Default: 3. |
strict |
logical flag: if TRUE, an element must be strictly greater than all other values in its window to be considered a peak. Default: TRUE. |
na.rm |
logical indicating whether |
an object like s.irrad of logical values. Values that are TRUE correspond to local peaks in the data.
This function is a wrapper built on function
peaks from splus2R and handles non-finite
(including NA) values differently than peaks, instead of giving an
error they are replaced with the smallest finite value in x.
Other peaks and valleys functions: get_peaks,
peaks, valleys
with(sun.data, w.length[find_peaks(s.e.irrad)])