[英]Use ggplot2 to create multiple line graphs
我的數據看起來像這樣(90 行除外)。
test <- data.frame("Site_No" = c("01370", "01332", "01442"),"0.99" = c(12, 15, 18), "0.98" = c(14, 15, 18), "0.90" = c(7, 22, 30))
我想使用 ggplot2 創建 3 個單獨的線圖。 x 軸將是 0.99、0.98、0.90(也就是我的數據框的列名)。 y 軸將是列中值的范圍(因此范圍為 7 到 30)。 我想要一個 plot 用於我的每個 Site_No(站號:01370、01332、01442)。
我正在盡我最大的努力自己解決這個問題,但由於我的數據框的結構,我沒有運氣。
謝謝您的幫助!
我通常使用 data.table package 和 'melt' function 來獲得鍵值格式。
這種格式對於 ggplot2 來說要好得多:
# Your test data: (notice that i transformed the rownames into a column)
test <- data.frame("0.99" = c(12, 15, 18), "0.98" = c(14, 15, 18), "0.90" = c(7, 22, 30))
test$rownames <- c("01370", "01332", "01442")
# melt and plot:
dt <- data.table::as.data.table(test)
melted <- data.table::melt(dt, measure = c("X0.99","X0.98","X0.90"))
ggplot2::ggplot(data = melted, mapping = aes(x = variable, y = value, group = rownames)) +
ggplot2::geom_line() +
ggplot2::facet_grid(rows = vars(rownames))
編輯:根據您編輯的問題:
test <- data.frame("Site_No" = c("01370", "01332", "01442"),"0.99" = c(12, 15, 18), "0.98" = c(14, 15, 18), "0.90" = c(7, 22, 30))
dt <- as.data.table(test)
melted <- data.table::melt(dt, measure = c("X0.99","X0.98","X0.90"))
ggplot2::ggplot(data = melted, mapping = aes(x = variable, y = value, group = Site_No)) +
ggplot2::geom_line() +
ggplot2::facet_grid(rows = vars(Site_No))
EDIT2 :根據您的第二條評論:為每個組創建新圖:
test <- data.frame("Site_No" = c("01370", "01332", "01442"),"0.99" = c(12, 15, 18), "0.98" = c(14, 15, 18), "0.90" = c(7, 22, 30))
dt <- as.data.table(test)
melted <- data.table::melt(dt, measure = c("X0.99","X0.98","X0.90"))
for (i in unique(melted$Site_No)){
dev.new()
print(ggplot2::ggplot(data = melted[Site_No == i,], mapping = aes(x = variable, y = value, group = Site_No)) +
ggplot2::geom_line())
}
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