| peak.finder {RamanMP} | R Documentation |
Peaks identification
Description
The function identifies peaks based on local maxima. The function returns a list of the peaks and a plot with the peaks labeled. Missing values (NA) are removed.
Usage
peak.finder(spectrum, threshold=0, m=5, max.peak=0)
Arguments
spectrum |
A dataframe/matrix with only two columns: the first column must report the frequency values; the second column must report the intensity values. |
threshold |
Numeric. It indicates the value on y-axis that the peak intensity must exceed to be considered a peak. This can be helpful in case of noisy Raman spectrum. The default value is 0. |
m |
Numeric. It indicates the interval on x-axis for the determination of the interval for the calculation of the peak. Default value is 5. |
max.peak |
Numberic. It indicates the number of peaks that should be displayed. The default is 0, which indicates that all peaks are showed. |
Value
Return the normalised spectra: the first column represent the frequency data, the second the intensity values normalised by Z-score
Examples
data("MPdatabase")
peak.data<-peak.finder(MPdatabase[,c(1,7)], threshold = 500, m=7)