rysgran (version 1.0)

rysgran.hist: Histograms of Grain Size Data

Description

rysgran.hist generates histograms of weight percentage of phi classes for each grain size sample

Usage

rysgran.hist(tab, subset = NULL, which = NULL, ordered = TRUE)

Arguments

tab

a data matrix with grain size samples

subset

Vector whit factor to subset the histograms. Default is NULL

which

factor from subset object argument. Default is NULL

ordered

logical. If TRUE the panels order is on the order of row in tab, if FALSE the order is alphabetical. Default is TRUE

Value

• return multiples histograms

Details

rysgran.hist is the only function in rysgran package which uses the package lattice. Users familiarized with lattice will have no problem using the function rysgran.hist. the matrix of particle size used in data entry must contain the first line of phi classes (logarithmic scale), each following line should contain the weights of a sample. For further details on the structure of the input table see data example camargo2001 included in this package

See Also

rysgran.plot , gran.stats , rysgran.ternary , class.percent , lattice

Examples

#Example 1
#histograms ordered by as a table
library(rysgran)
data(camargo2001)
tab<-camargo2001
rysgran.hist(tab, ordered=TRUE)
#
#Example 2
#histograms ordered alphabetically
library(rysgran)
data(camargo2001)
tab<-camargo2001
rysgran.hist(tab, ordered=FALSE)
#
#Example 3 
#histograms separated by factors
library(rysgran)
data(camargo2001)
tab<-camargo2001
months<- rep(c("Jan","Fev","Mar","Abr","Mai"),each=7)
rysgran.hist(tab, ordered=TRUE , subset = months , which= "Jan")
#
#Example 4
#Histograms updated
library(rysgran)
data(camargo2001)
tab<-camargo2001
hist <- rysgran.hist(tab, ordered=TRUE)
hist
hist.up <- update(hist, aspect = .5,
    scales=list(x=list(cex=.7),y=list(cex=.7)),
    between= list(x = c(0.2), y = c(0.2)),
    ylab = "Frequency",
    xlab = "Phi",
    strip = strip.custom(bg = "lightblue"),
    col = "red",
    main="Histogram")
hist.up