qplot.R
In BrailleR: Improved Access for Blind Users

## ----GetLibraries-------------------------------------------------------------
library(BrailleR)   
library(ggplot2)   
dsmall = diamonds[1:100,]   

## ----g1-----------------------------------------------------------------------
g1 = qplot(carat, price, data = diamonds)   
# summary(g1)   
g1  
# VI(g1)   ### automatic since BrailleR v0.32.0

## ----g2-----------------------------------------------------------------------
g2 = qplot(carat, price, data = dsmall, colour = color)    
# summary(g2)   
g2

## ----g3-----------------------------------------------------------------------
g3 = qplot(carat, price, data = dsmall, shape = cut)    
# summary(g3)   
g3

## ----g4-----------------------------------------------------------------------
# to get semi-transparent points   
g4 = qplot(carat, price, data = diamonds, alpha = I(1/100))    
# summary(g4)   
g4

## ----g5-----------------------------------------------------------------------
# to add a smoother (default is loess for n<1000)   
g5 = qplot(carat, price, data = dsmall, geom = c("point", "smooth"))    
# summary(g5)   
g5
#! g5a = qplot(carat, price, data = dsmall, geom = c("point", "smooth"), span = 1)    
library(splines)    
#! g5b = qplot(carat, price, data = dsmall, geom = c("point", "smooth"), method = "lm")    
#! g5c = qplot(carat, price, data = dsmall, geom = c("point", "smooth"), method = "lm", formula = y ~ ns(x,5))    

## ----g6, include=FALSE--------------------------------------------------------
# continuous v categorical   
g6 = qplot(color, price / carat, data = diamonds, geom = "jitter", alpha = I(1 / 50))    
# summary(g6)   
g6
# VI(g6)     ### automatic since BrailleR v0.32.0
g6a = qplot(color, price / carat, data = diamonds, geom = "boxplot")    
# summary(g6a)   
g6a

## ----g7-----------------------------------------------------------------------
# univariate plots   
g7a = qplot(carat, data = diamonds, geom = "histogram")    
# summary(g7a)   
g7a
g7b = qplot(carat, data = diamonds, geom = "histogram", binwidth = 1, xlim = c(0,3))    
g7b
g7c = qplot(carat, data = diamonds, geom = "histogram", binwidth = 0.1, xlim = c(0,3))
g7c
g7d = qplot(carat, data = diamonds, geom = "histogram", binwidth = 0.01, xlim = c(0,3))    
# summary(g7d)   
g7d

## ----g8, include=FALSE--------------------------------------------------------
g8 = qplot(carat, data = diamonds, geom = "density")    
# summary(g8)   
g8

## ----g9, include=FALSE--------------------------------------------------------
# data is separated by implication using the following...   
g9 = qplot(carat, data = diamonds, geom = "density", colour = color)    
# summary(g9)   
g9
g10 = qplot(carat, data = diamonds, geom = "histogram", fill = color)    
# summary(g10)   
g10

## ----g11----------------------------------------------------------------------
# bar charts for categorical variable   
g11a = qplot(color, data = diamonds)    
# summary(g11a)   
g11a
g11b = qplot(color, data = diamonds, geom = "bar")    
# summary(g11b)   
g11b
g12a = qplot(color, data = diamonds, geom = "bar", weight = carat)   
# summary(g12a)   
g12a
g12b = qplot(color, data = diamonds, geom = "bar", weight = carat) + scale_y_continuous("carat")    
# summary(g12b)   
g12b

## ----g13----------------------------------------------------------------------
# time series plots   
g13a = qplot(date, unemploy / pop, data = economics, geom = "line")    
# summary(g13a)   
g13a
g13b = qplot(date, uempmed, data = economics, geom = "line")    
# summary(g13b)   
g13b

## ----g14, include=FALSE-------------------------------------------------------
# path plots   
year <- function(x) as.POSIXlt(x)$year + 1900    
g14a = qplot(unemploy / pop, uempmed, data = economics, geom = c("point", "path"))    
# summary(g14a)   
g14a
#g14b = qplot(unemploy / pop, uempmed, data = economics, geom = "path", colour = year(date)) + scale_area()    
#summary(g14b)   

## ----g15, include=FALSE-------------------------------------------------------
# facets is the ggplot term for trellis' panels   
g15a = qplot(carat, data = diamonds, facets = color ~ ., geom = "histogram", binwidth = 0.1, xlim = c(0, 3))    
# summary(g15a)   
g15a
g15b = qplot(carat, ..density.., data = diamonds, facets = color ~ ., geom = "histogram", binwidth = 0.1, xlim = c(0, 3))   
# summary(g15b)   
g15b

## ----g16----------------------------------------------------------------------
# rescaling of the axes   
g16 = qplot(carat, price, data = dsmall, log = "xy")   
# summary(g16)   
g16

## ----g17, include=FALSE-------------------------------------------------------
# Facets syntax without a "." before the "~" causes grief
g17 = qplot(displ, hwy, data=mpg, facets =~ year) + geom_smooth()    
# summary(g17)   
g17