我需要阅读以下数据文件夹中的''wdbc.data': http://archive.ics.uci.edu/ml/machine-learning-databases/breast-cancer-wisconsin/
使用命令read.csv很容易在R中执行此操作,但由于缺少标题,我该如何添加它?我有这些信息,但不知道该怎么做,我宁愿不编辑数据文件。
答案 0 :(得分:32)
您可以执行以下操作:
加载数据:
test <- read.csv(
"http://archive.ics.uci.edu/ml/machine-learning-databases/breast-cancer-wisconsin/breast-cancer-wisconsin.data",
header=FALSE)
请注意,header
的{{1}}参数的默认值为read.csv
,因此为了获取所有行,您需要将其设置为TRUE
。
将名称添加到data.frame
中的不同列FALSE
或者我理解的替代和更快(不重新加载整个数据集):
names(test) <- c("A","B","C","D","E","F","G","H","I","J","K")
答案 1 :(得分:3)
如果您有colnames
或data.frame
matrix
代替姓名
答案 2 :(得分:1)
您还可以通过创建值数组并分配该数组来解决此问题:
newheaders <- c("a", "b", "c", ... "x")
colnames(data) <- newheaders
答案 3 :(得分:0)
如果您有兴趣从.txt
文件中读取一些数据,并且只将该文件的几列提取到带有定制标头的新.txt
文件中,以下代码可能会有用:
# input some data from 2 different .txt files:
civit_gps <- read.csv(file="/path2/gpsFile.csv",head=TRUE,sep=",")
civit_cam <- read.csv(file="/path2/cameraFile.txt",head=TRUE,sep=",")
# assign the name for the output file:
seqName <- "seq1_data.txt"
#=========================================================
# Extract data from imported files
#=========================================================
# From Camera:
frame_idx <- civit_cam$X.frame
qx <- civit_cam$q.x.rad.
qy <- civit_cam$q.y.rad.
qz <- civit_cam$q.z.rad.
qw <- civit_cam$q.w
# From GPS:
gpsT <- civit_gps$X.gpsTime.sec.
latitude <- civit_gps$Latitude.deg.
longitude <- civit_gps$Longitude.deg.
altitude <- civit_gps$H.Ell.m.
heading <- civit_gps$Heading.deg.
pitch <- civit_gps$pitch.deg.
roll <- civit_gps$roll.deg.
gpsTime_corr <- civit_gps[frame_idx,1]
#=========================================================
# Export new data into the output txt file
#=========================================================
myData <- data.frame(c(gpsTime_corr),
c(frame_idx),
c(qx),
c(qy),
c(qz),
c(qw))
# Write :
cat("#GPSTime,frameIdx,qx,qy,qz,qw\n", file=seqName)
write.table(myData, file = seqName,row.names=FALSE,col.names=FALSE,append=TRUE,sep = ",")
当然,您应该根据自己的应用程序修改此示例脚本。
答案 4 :(得分:0)
这应该可以解决,
kable(dt) %>%
kable_styling("striped") %>%
add_header_above(c(" " = 1, "Group 1" = 2, "Group 2" = 2, "Group 3" = 2))
#OR
kable(dt) %>%
kable_styling(c("striped", "bordered")) %>%
add_header_above(c(" ", "Group 1" = 2, "Group 2" = 2, "Group 3" = 2)) %>%
add_header_above(c(" ", "Group 4" = 4, "Group 5" = 2)) %>%
add_header_above(c(" ", "Group 6" = 6))
有关更多信息,您可以检查link