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simplexyplot.R
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simplexyplot.R
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# simple plot using ggplot
library(ggplot2)
library(extrafont)
library(fontcm)
xvector <- c(0,1,2,3,4,5,6)
yvector <- 2 * xvector
dd <- NULL
dd <- cbind(dd, xvector)
dd <- cbind(dd, yvector)
df <- as.data.frame(dd)
xlimits <- c(0,9)
ylimits <- c(0,12)
xlabel <- "X axis"
ylabel <- "Y axis"
plottitle <- "Graph of y=2x\n"
simplePlotFunction <- function(data,
xlimits,
ylimits,
xlabelstring,
ylabelstring,
plottitle,
fontfamily="sans")
{
returnplot <- ggplot(data=data, aes(x=xvector,y=yvector)) +
theme(
text=element_text(size=20, face="bold", family=fontfamily),
axis.title.x = element_text(vjust = -0.5 )
) +
labs(title=plottitle, x=xlabelstring, y=ylabelstring) +
geom_line(data=data, size=1, color="black" ) +
geom_point(data=data, size=5, color="black" ) +
coord_cartesian(xlim=xlimits, ylim=ylimits) +
scale_y_continuous(breaks=seq(ylimits[1],ylimits[2],2)) +
scale_x_continuous(breaks=seq(xlimits[1],xlimits[2],2))
return(returnplot)
}
PlotFunctionLR <- function(data,
xlimits,
ylimits,
xlabelstring,
ylabelstring,
plottitle,
fontfamily="sans",
ols,
scalextick=2,
scaleytick=2)
{
predval <- as.data.frame(cbind(data$xvector,ols$fit))
returnplot <- ggplot(data=data, aes(x=xvector,y=yvector)) +
theme(
text=element_text(size=20, face="bold", family=fontfamily),
axis.title.x = element_text(vjust = -0.5 )
) +
labs(title=plottitle, x=xlabelstring, y=ylabelstring) +
geom_point(data=data, size=5, color="black") +
# geom_line(data=predval, size=1, color="blue") +
geom_smooth(method=lm, size=1, color="blue", se=FALSE) +
coord_cartesian(xlim=xlimits, ylim=ylimits) +
scale_y_continuous(breaks=seq(ylimits[1],ylimits[2],scaleytick)) +
scale_x_continuous(breaks=seq(xlimits[1],xlimits[2],scalextick))
return(returnplot)
}
myplot <- simplePlotFunction(data=df, xlimits=xlimits,
ylimits=ylimits,
xlabelstring=xlabel,
ylabelstring=ylabel,
plottitle=plottitle )
# If you want to use a system font that isn't postscript, you'll have to
# change the fontfamily to "CM Sans" or whatever, and output to PDF
# instead of PNG or whatever.
#
#ggsave("ggplot_cm.pdf", myplot, width=5.5, height=5)
#embed_fonts("ggplot_cm.pdf", outfile="ggplot_cm_embed.pdf")
png(filename="simplexyplot.png",
width=5.5, height=5, units="in", pointsize=12, bg="white", res=300,
type="quartz"
)
myplot
dev.off()
# NOW, for example 2:
xvector <- c(1,2,7,4,5)
yvector <- c(4,5,11,9,8)
dd <- NULL
dd <- cbind(dd, xvector)
dd <- cbind(dd, yvector)
df <- as.data.frame(dd)
plottitle <- "Graph of an unknown function\n"
myplot <- simplePlotFunction(data=df,
xlimits=xlimits,
ylimits=ylimits,
xlabelstring=xlabel,
ylabelstring=ylabel,
plottitle=plottitle )
png(filename="errorxyplot.png",
width=5.5, height=5, units="in", pointsize=12, bg="white", res=300,
type="quartz"
)
myplot
dev.off()
# and example 3:
xvector <- c(1,2,7,4,5,3, 4.5, 6 )
yvector <- c(4,5,11,9,8,6,7, 11 )
dd <- NULL
dd <- cbind(dd, xvector)
dd <- cbind(dd, yvector)
df <- as.data.frame(dd)
olsresult <- lm(df, formula = yvector ~ xvector)
plottitle <- "Graph of an unknown function\n"
myplot <- PlotFunctionLR(data=df,
xlimits=xlimits,
ylimits=ylimits,
xlabelstring=xlabel,
ylabelstring=ylabel,
plottitle=plottitle,
ols=olsresult )
myplot <- myplot + geom_text(aes(6, 4, label="Y-intercept: 2.6"), size=10)
myplot <- myplot + geom_text(aes(5.4, 2, label="Slope: 1.23"), size=10)
png(filename="errorxyplotlr.png",
width=5.5, height=5, units="in", pointsize=12, bg="white", res=300,
type="quartz"
)
myplot
dev.off()
# and example 4:
xvector <- c(1,2,7,4,5,3, 4.5, 6 )
yvector <- xvector^2
dd <- NULL
dd <- cbind(dd, xvector)
dd <- cbind(dd, yvector)
df <- as.data.frame(dd)
xlimits <- c(0,9)
ylimits <- c(0,50)
olsresult <- lm(df, formula = yvector ~ xvector)
plottitle <- "Graph of an unknown function\n"
myplot <- PlotFunctionLR(data=df, xlimits=xlimits, ylimits=ylimits, xlabelstring=xlabel, ylabelstring=ylabel, plottitle=plottitle, ols=olsresult, scaleytick=10 )
myplot <- myplot + geom_text(aes(3, 40, label="Y-intercept: -12.2"), size=8)
myplot <- myplot + geom_text(aes(2.3, 34, label="Slope: 7.94"), size=8)
png(filename="errorxyplotlrexponential1.png",
width=5.5, height=5, units="in", pointsize=12, bg="white", res=300,
type="quartz"
)
myplot
dev.off()
# and example 5:
xvector <- c(seq(0,32,2) )
yvector <- xvector^2
dd <- NULL
dd <- cbind(dd, xvector)
dd <- cbind(dd, yvector)
df <- as.data.frame(dd)
xlimits <- c(0,33)
ylimits <- c(0,1050)
olsresult <- lm(df, formula = yvector ~ xvector)
plottitle <- "Graph of an unknown function\n"
myplot <- PlotFunctionLR(data=df, xlimits=xlimits, ylimits=ylimits, xlabelstring=xlabel, ylabelstring=ylabel, plottitle=plottitle, ols=olsresult, scaleytick=100, scalextick=5 )
#myplot <- myplot + geom_text(aes(6, 4, label="Y-intercept: 2.6"), size=10)
#myplot <- myplot + geom_text(aes(5.4, 2, label="Slope: 1.23"), size=10)
png(filename="errorxyplotlrexponential2.png",
width=5.75, height=5, units="in", pointsize=12, bg="white", res=300,
type="quartz"
)
myplot
dev.off()