I am making a series of plots in ggplot2, one per column of data, and I'd like to be able to code it so that the Y-axis label changes dynamically to the name of the plotted variable (and some other constant info in the label).
my data from dput()
:
df <- structure(list(day = structure(c(1L, 1L, 1L, 1L, 1L, 1L, 1L,
1L, 1L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 2L, 3L, 3L, 3L, 3L, 3L,
3L, 3L, 3L, 3L), .Label = c("5-Aug", "10-Aug", "17-Aug"), class = "factor"),
station = c(1L, 2L, 3L, 1L, 2L, 3L, 1L, 2L, 3L, 1L, 2L, 3L,
1L, 2L, 3L, 1L, 2L, 3L, 1L, 2L, 3L, 1L, 2L, 3L, 1L, 2L, 3L
), Bug = structure(c(1L, 1L, 1L, 2L, 2L, 2L, 3L, 3L, 3L,
1L, 1L, 1L, 2L, 2L, 2L, 3L, 3L, 3L, 1L, 1L, 1L, 2L, 2L, 2L,
3L, 3L, 3L), .Label = c("Copepod", "Copepod nauplii", "Harpactioid copepods"
), class = "factor"), Mean = c(382.4048896, 1017.171389,
1519.141298, 233.3753491, 167.1086422, 530.7227507, 20.55943305,
482.9992303, 10.49548997, 698.0193699, 5398.533995, 2458.635058,
36.90431458, 124.4956045, 20.8459728, 8.414735929, 4014.649407,
7.279486288, 346.1246378, 5722.82018, 6253.357325, 427.6856315,
1768.984975, 1486.635443, 4.825526305, 46.50462845, 1.07692853
), StErr = c(83.18963396, 100.9187504, 73.45417607, 88.08491141,
44.57580452, 44.03459391, 4.663586058, 112.4238952, 2.551982788,
284.3933876, 3417.741042, 689.5558519, 9.798626545, 49.16103906,
4.268815029, 3.76465482, 1803.977156, 1.328408258, 53.67873047,
1796.827256, 732.573507, 86.56594682, 198.7842421, 229.0132055,
1.129940095, 16.48065742, 0.283417726)), .Names = c("day",
"station", "Bug", "Mean", "StErr"), row.names = c(NA, -27L), class = "data.frame")
I am using the following code to automatically create and save a new, dynamically named .pdf:
library(ggplot2)
df$day<-factor(df$day, levels = c("5-Aug","10-Aug","17-Aug")) #corrects day order
allplots <- ggplot(data=df, aes(x=station, y=Mean)) +
geom_errorbar(aes(ymin=(Mean-StErr), ymax=(Mean+StErr)), colour="black", width=0.1)+
geom_point(size=2) +
xlab(NULL) +
ylab(expression(paste('Copepods,'~'#/m'^3))) +
theme_bw() +
theme(
panel.grid.major = element_blank(),
panel.grid.minor = element_blank()
) +
scale_x_continuous(expand=c(.3,0), breaks=c(1:3), labels=c("In", "FL", "Off")) +
annotation_logticks(sides = "l") +
scale_y_log10() +
theme(axis.text.x=element_text(size=12)) +
theme(axis.text.y=element_text(size=12)) +
facet_grid(Bug ~ day)
plotfun <- function(x,y) {
a <- ggplot(data=x, aes(x=station, y=Mean)) +
geom_errorbar(aes(ymin=(Mean-StErr), ymax=(Mean+StErr)), colour="black", width=0.1)+
geom_point(size=2) +
xlab(NULL) +
ylab(expression(paste('Copepods,'~'#/m'^3))) + #I'd like Copepods to change with variable that is being plotted
theme_bw() +
theme(
panel.grid.major = element_blank(),
panel.grid.minor = element_blank()
) +
scale_x_continuous(expand=c(.3,0), breaks=c(1:3), labels=c("In", "FL", "Off")) +
annotation_logticks(sides = "l") +
scale_y_log10() +
theme(axis.text.x=element_text(size=12)) +
theme(axis.text.y=element_text(size=12)) +
facet_grid(.~day)
pdf(file=paste(y,'pdf',sep="."))
print(a)
dev.off()
}
mapply(plotfun, split(df, df$Bug), levels(df$Bug))
I tried using paste(levels(df$Bug))
within the ylab() but couldn't get it to work. I'm not sure what else to try, and was hoping someone would be able to suggest something I can look into. I would like each Y-axis to read " VariableName
, per m^3" with the VariableName taken from the levels of Bug (ie Copepod, Copepod nauplii, and Harpacticoid copepods). Does anyone know how to do this? This seems really cool and useful if I can get it to work! Thanks for any suggestions.
I think I can help with the labeling of the ylab
of the plots and that seems to be the core of your question. This produces three plots but I encountered various ggplot errors which ( don't understand at all well) and this required that I pull out a bunch of code relating to themes and scales . I later put it back in with a different ordering which seemed to make the ggplot machinery happy.
plotfun <- function(x,y) {
a <- ggplot(data=x, aes(x=station, y=Mean)) +
geom_errorbar(aes(ymin=(Mean-StErr), ymax=(Mean+StErr)),
colour="black", width=0.1)+
geom_point(size=2) +
xlab(NULL) +
ylab( bquote(.(y)~"#"/m^3) )+
scale_y_log10()+
theme_bw()
pdf(file=paste(y,'pdf',sep="."))
print(a)
dev.off()
}
mapply(plotfun, x=split(df, df$Bug), y=levels(df$Bug))
By moving items around (in a manner driven by the error messages I successively got) and adding one +sign I was able to get this version to run:
plotfun <- function(x,y) {
a <- ggplot(data=x, aes(x=station, y=Mean)) +
geom_errorbar(aes(ymin=(Mean-StErr), ymax=(Mean+StErr)), colour="black", width=0.1)+
geom_point(size=2) +
xlab(NULL) +
ylab(bquote(.(y)*","*~"#"/m^3) )+
scale_y_log10() + annotation_logticks(sides = "l") +
theme_bw() +
theme( panel.grid.major = element_blank(),
panel.grid.minor = element_blank() ) + facet_grid(.~day)
pdf(file=paste(y,'pdf',sep="."))
print(a)
dev.off()
}
mapply(plotfun, x=split(df, df$Bug), y=levels(df$Bug))
I'll just post one page:
Also fixed the errors I was geting with the allplots version:
allplots <- ggplot(data=df, aes(x=station, y=Mean)) +
geom_errorbar(aes(ymin=(Mean-StErr), ymax=(Mean+StErr)), colour="black", width=0.1)+
geom_point(size=2) +
facet_grid(Bug ~ day) +
xlab(NULL) +
ylab(expression(Copepods *","* ~'#'/m^3)) +scale_x_continuous(expand=c(.3,0), breaks=c(1:3), labels=c("In", "FL", "Off")) +annotation_logticks(sides = "l") + scale_y_log10() +
theme_bw() +
theme( panel.grid.major = element_blank(),
panel.grid.minor = element_blank() ) +
theme(axis.text.x=element_text(size=12)) +
theme(axis.text.y=element_text(size=12))
print(allplots)
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