如何从多个数据帧创建热图 [英] How to create heatmap from multiple data frames
问题描述
我对R还是很陌生,我一直坚持如何从列表中的多个数据帧创建热图。
I'm quite new to R and I'm stuck on how to create a heatmap from multiple data frames in a list.
每个数据框:X位置,Y位置,PatchStatus
There are 3 columns in the each data frame: X location, Y location, PatchStatus
第一个数据框如下:
listofdfs <- list() #list of dataframes
listofdfs[1]
allPoints.xLocs allPoints.yLocs allPoints.patchStatus
1 67.30330212 87.857495 0
2 69.60800088 77.959314 0
3 74.63313295 93.059260 0
4 92.59099136 77.732215 1
5 18.05288289 61.200910 1
6 55.83499856 50.993785 0
7 12.15664148 58.220179 1
8 41.50413859 92.529054 0
9 83.08209025 24.567501 0
10 53.50615149 46.339927 0
...依此类推,最高可达100分
...and so on up to 100 points
每个数据帧将具有相同的X和Y位置,但是补丁状态将不同(可以为0或1)。
Each data frame will have the same X and Y locations, however Patch Status will be different (can be 0 or 1).
我的目标是创建一个结合了所有数据帧(我打算有10-15个数据帧)的热图,这些数据帧显示了更容易出现以下状态的补丁: 1。任何帮助将不胜感激。谢谢。
My goal is to create a heatmap combining all the data frames (I intend to have 10-15 data frames) showing the patches that are more susceptible to having a status of "1". Any help would be greatly appreciated. Thanks.
推荐答案
数据:
df <- read.table(text = "allPoints.xLocs allPoints.yLocs allPoints.patchStatus
1 67.30330212 87.857495 0
2 69.60800088 77.959314 0
3 74.63313295 93.059260 0
4 92.59099136 77.732215 1
5 18.05288289 61.200910 1
6 55.83499856 50.993785 0
7 12.15664148 58.220179 1
8 41.50413859 92.529054 0
9 83.08209025 24.567501 0
10 53.50615149 46.339927 0", header = TRUE, stringsAsFactors = FALSE)
listofdfs <- list(df, df)
代码:
library('data.table')
listofdfs <- lapply(seq_len(length(listofdfs)), function(i){
x <- listofdfs[[i]]
# assign id and combine x and y coordinates
setDT(x)[, `:=` ( id = i, coords = paste0(allPoints.xLocs, ",", allPoints.yLocs)) ]
} )
# combine list into a data table.
df2 <- rbindlist(l = listofdfs)
图 >
library('ggplot2')
ggplot( data = df2, mapping = aes( x = coords, y = factor(id) ) ) + # draw heatmap
geom_tile( aes( fill = factor(allPoints.patchStatus) ), colour = "white") +
coord_flip() +
scale_fill_discrete(name = "Patch Status") +
labs( x = "Coordinates", y = "Data Frame Number")
图形:
您可以遍历数据帧列表,并为每个数据帧创建热图。下面,我演示如何获取一个数据帧的热图。
You can loop through the list of data frames and create heatmap for each dataframe. Below, I am showing how to get a heatmap for one data frame.
图2
ggplot( data = df, mapping = aes( x = factor(allPoints.xLocs), y = factor(allPoints.yLocs) ) ) +
geom_tile( aes( fill = factor(allPoints.patchStatus) ), colour = "white") +
scale_fill_discrete(name = "Patch Status") +
labs( x = "X-Coordinate", y = "Y-Coordinate") +
theme_bw() +
theme(axis.text.x = element_text(angle = 45, hjust = 1))
图2
Plot-3
df
数据用于上面-请参见顶部的数据部分。
Plot-3
df
data is used from above - see Data section at the top.
library('data.table')
listofdfs <- list(df, df)
df2 <- rbindlist(l = listofdfs)
df2 <- df2[, .(sum_patch = sum(allPoints.patchStatus)), by = .(allPoints.xLocs, allPoints.yLocs)]
library('ggplot2')
ggplot( data = df2, mapping = aes( x = factor(allPoints.xLocs), y = factor(allPoints.yLocs) ) ) +
geom_tile( aes( fill = sum_patch ), colour = "white") +
labs( x = "X-Coordinate", y = "Y-Coordinate") +
theme_bw() +
theme(axis.text.x = element_text(angle = 45, hjust = 1))
图3:
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