我正在ggplot2中繪製一系列圖,每列數據一列,我希望能夠對其進行編碼,以便Y軸標籤動態變化爲繪製變量的名稱(以及其他一些常數信息在標籤中)。如何在ggplot2中使用ylab()創建動態軸標籤?
我從dput()
數據:
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")
我使用下面的代碼來自動創建並保存一個新的,動態命名的.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))
我試過ylab內使用paste(levels(df$Bug))
( ),但無法讓它工作。我不確定還有什麼可以嘗試的,希望有人能夠提出一些我可以研究的建議。我希望每個Y軸都讀取「VariableName
,每立方米」,其中VariableName取自Bug的級別(即橈足類,橈足類和橈足類橈足類)。有誰知道如何做到這一點?如果我能把它運用起來,這看起來非常酷和有用!感謝您的任何建議。
謝謝,那就是我正在尋找的!你介意給我解釋一下,如何在變量名後加「3/m^3」之前的逗號?我已經在逗號周圍嘗試過和沒有「」。 – wonderoustree
使用此表單:'*「,」*'...在輸出中插入(未)引用的逗號字符。表達式標記需要用代數或星號或數學符號來區分它們。 –
修改了答案。 –