gcxgclab (version 1.0.1)

top_peaks: Top Peaks

Description

top_peaks finds the top N highest peaks.

Usage

top_peaks(TIC_df, N)

Value

A data.frame object. A data frame with 4 columns (Time, X, Y, Peak) with the top N peaks, with their time coordinates.

Arguments

TIC_df

a data.frame object. Data frame with 4 columns (Overall Time Index, RT1, RT2, TIC), ideally the output from create_df(), or the first data frame returned from extract_data(), $TIC_df.

N

int object. The number of top peaks to be found in the sample. N should be an integer >=1. Default suggestion is N = 20.

Details

This function finds the top N peaks in intensity in the sample.

Examples

file1 <- system.file("extdata","sample1.cdf",package="gcxgclab")
frame <- extract_data(file1,mod_t=.5)
peaks <- top_peaks(frame$TIC_df, 5)
plot_peak(peaks, frame, title="Top 20 Peaks")
plot_peakonly(peaks,title="Top 20 Peaks")