MakeCFD: Generate a data frame containing cumulative frequency...

In bceaton/GSDtools: Tools for analyzing pebble counts used to measure river bed surface texture

Description

MakeCFD is a function that creates a data frame containing the cumulative grain size distribution information for a sample of n observations of b axis diameter (in mm).

Usage

MakeCFD(obs, increment = 0.5, count = FALSE, plot = FALSE)

Arguments

obs	vector containing b-axis measurements of gravel bed surface
increment	an optional parameter to control the size of the grain size classes used for the analysis (1.0 = 1.0 phi intervals, 0.5 = 1/2 phi intervals, 0.25 = 1/4 phi intervals, etc.). Default value is 0.5.
count	optional flag to record the number of observations falling in each size class as an additional variable in the output data frame
plot	optional flag to produce a graph of the resulting grain size distribution

Details

The function returns a data frame listing upper bounds of each size class containing data, as well as the cumulative proportion of the observations that fall below the given grain size. The output of this function is the required input for other functions in this package. In order to retain information about the sample size, there is the option to output the total counts for each size class, as well.

bceaton/GSDtools documentation built on June 7, 2019, 12:53 a.m.