从数据创建数据帧:
df <- data.frame(Gene_name = c("E_2401_ctrl_1", "E_2401_ctrl_2", "E_2401_ctrl_3", "E_2401_drt_1", "E_2401_drt_2"),
LOC_Os01g01312 = c(1.601736731, 0.310548148, 1.238589942, -0.899941148, -0.980640435),
LOC_Os01g01360 = c(-0.850254449, -0.420792594, 0.083358279, 0.86759297, 0.102030534),
LOC_Os01g01390 = c(0.40382069 , -0.377555928, -0.009849284, -0.285629267, 0.219967368),
LOC_Os01g01610 = c(-1.102507436, -0.90329537, -0.458899223, 1.042853272, 0.904937227),
LOC_Os01g01620 = c(-0.806239145, -1.190898502, -0.229250108, 0.812535653, 1.004865332))
library(ggplot2)
library(reshape2)
为ggplot重塑长格式是个好主意
df_melt <- reshape2::melt(df, id.vars = "Gene_name")
检查数据现在看起来如何
head(df_melt, 10)
基因名称在一列中,并且相应的z分数在另一列中
ggplot(data = df_melt)+
geom_line(aes(x = variable, y = value, group = Gene_name))+
theme(axis.text.x = element_text(angle = 45, hjust = 1))+
xlab("gene")+
ylab("")
如何读取:
ggplot(data = df_melt)
既然你想连接值的行指定,从中可以得出的情节
geom_line(aes(x = variable, y = value, group = Gene_name))
geom_line数据。在ggplot中,所有变量都在aes()内部。
theme(axis.text.x = element_text(angle = 45, hjust = 1))+
xlab("")+
ylab("z-score")
剩下的只是化妆
,如果你想刻面图,添加一个变量,通过它会突间
df_melt <- data.frame(rbind(df_melt, df_melt),
letters=rep(c("A", "B"), each = nrow(df_melt)))
在这里,我只是重复数据帧两次,
rbind(df_melt, df_melt)
以及第一个标有“A”和第二个标有“B”的行。
letters=rep(c("A", "B"), each = nrow(df_melt))
df_melt
现在你可以用“字母”变小面
ggplot(data = df_melt)+
geom_line(aes(x = variable, y = value, group = Gene_name))+
theme(axis.text.x = element_text(angle = 45, hjust = 1))+
xlab("gene")+
ylab("z-score")+
facet_wrap(~letters, ncol = 1)
编辑:类群标签可以通过添加颜色=变量参数的AES(着色),您需要彩色的GEOM内调用。我会从一开始启动:
df <- data.frame(Gene_name = c("E_2401_ctrl_1", "E_2401_ctrl_2", "E_2401_ctrl_3", "E_2401_drt_1", "E_2401_drt_2"),
LOC_Os01g01312 = c(1.601736731, 0.310548148, 1.238589942, -0.899941148, -0.980640435),
LOC_Os01g01360 = c(-0.850254449, -0.420792594, 0.083358279, 0.86759297, 0.102030534),
LOC_Os01g01390 = c(0.40382069 , -0.377555928, -0.009849284, -0.285629267, 0.219967368),
LOC_Os01g01610 = c(-1.102507436, -0.90329537, -0.458899223, 1.042853272, 0.904937227),
LOC_Os01g01620 = c(-0.806239145, -1.190898502, -0.229250108, 0.812535653, 1.004865332))
df_melt <- reshape2::melt(df, id.vars = "Gene_name")
#the ifelse() part makes another column called "lett" where if it is a "crtl" gene will be "A" and "B" if not
df_melt <- data.frame(rbind(df_melt, df_melt),
lett = ifelse(grepl("ctrl", df_melt$Gene_name), "A", "B"))
ggplot(data = df_melt)+
geom_line(aes(x = variable, y = value,group = Gene_name, color=lett))+
theme(axis.text.x = element_text(angle = 45, hjust = 1))+
xlab("gene")+
ylab("z-score")+
scale_color_manual(values=c("A" = "red", "B" = "blue"))
更多的控制颜色:
http://ggplot2.tidyverse.org/reference/scale_manual.html http://ggplot2.tidyverse.org/reference/scale_brewer.html
好了,开始读一些GGPLOT2教程。 – Roland
[可重现的例子](https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example)一旦你更好地理解你的问题是获得良好回应的最好方法这里。 –