我想我的想法可能过于复杂了。我有一个文件,我想用它在 R 中制作条形图。该文件如下所示:
## metadata
# filepath
## filename
# Started on: Tue Jul 30 10:46:57 EDT 2013
#HISTOGRAM java.lang.Integer
READ: 1 2
-1 28 28
0 27 29
我想制作我拥有的数据的条形图。我在想它看起来有点像这样:
|
|
# | |
| | |
| | | |
|__|_____|____|___|____
-1(1) -1(2) 0(1) 0(2)
但我无法正确读取数据。这是我的代码:
# Parse the arguments
args <- commandArgs(trailing=T)
#Chart file
metricsFile <- args[1]
#pdf file path and name that I want to produce
outputFile <- args[2]
# Figure out where the firstLine and the chart are in the file and parse them out
startFinder <- scan(metricsFile, what="character", sep="\n", quiet=TRUE, blank.lines.skip=FALSE)
firstBlankLine=0
#finds empty strings
for (i in 1:length(startFinder))
{
if (startFinder[i] == "") {
if (firstBlankLine==0) {
firstBlankLine=i+1
} else {
secondBlankLine=i+1
break
}
}
}
#I accept some args and I read past some header information
firstLine <- read.table(metricsFile, header=T, nrows=1, sep="\t", skip=firstBlankLine)
#prints "firstLine: -1" "firstLine: 28" "firstLine: 28"
secondLine <- read.table(metricsFile, header=T, nrows=1, sep="\t", skip=secondBlankLine)
#prints "secondLine: -1" "secondLine: 27" "secondLine: 29"
# Then plot as a PDF
pdf(outputFile)
#I am just inputing firstLine here because I was trying to see how it works
#I get the error:'height' must be a vector or a matrix
barplot(firstLine,
main=paste("Read",(i-1)," Distribution ",
xlab="Counts",
ylab="F/R Orientation")
dev.off()
正如我在代码中评论的那样,我得到了“高度”必须是向量或矩阵的错误。我不太了解 R,不知道如何将其作为向量读取,而不是我目前的操作方式。我也不确定问题是否在于我正在使用 barplot。难道只是“情节”更好用吗?也许我使用 read.table 不正确?