[问题类型]:
如题
[软件熟悉度]:
新手,接触R约两个月
[问题叙述]:
本人目前在练习data mining,手边有个app click log的资料
格式如下
uid system command DataTimes
1 ios 0 2013/5/7 10:44
1 ios 10 2013/5/7 10:45
2 android 0 2013/5/7 10:50
2 android 10 2013/5/7 10:51
3 ios 0 2013/5/7 10:58
3 ios 20 2013/5/7 10:59
.
.
.
想请问
因为我要把整笔资料操作次数过少的使用者清掉
于是我整理了一个uidlist
是click次数超过n次的uidlist
之后我做了下面这个指令
data1 <- data[data$uid %in% uidlist,]
点开data1确实留下click次数超过n的资料
但我后来输入
barchart(data1$uid)
显示出的长条图中被移除的uid还是存在
有点像是
uid
1 ============
2 ====
3 =
4
5 ===================
6
7 ===
8 =
9 =======
0 5 10
Feq
像uid 4跟6明明被移掉了却还是会显示
不知道为何
想请问为什会这样及如何确实移除?
如有描述不清楚或不完全,我会立即补充谢谢!!
[环境叙述]:
R version 3.2.1 (2015-06-18)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1
locale:
[1] LC_COLLATE=Chinese (Traditional)_Taiwan.950
[2] LC_CTYPE=Chinese (Traditional)_Taiwan.950
[3] LC_MONETARY=Chinese (Traditional)_Taiwan.950
[4] LC_NUMERIC=C
[5] LC_TIME=Chinese (Traditional)_Taiwan.950
attached base packages:
[1] stats graphics grDevices utils datasets methods
[7] base
other attached packages:
[1] lattice_0.20-31 arules_1.1-9 Matrix_1.2-1
loaded via a namespace (and not attached):
[1] tools_3.2.1 grid_3.2.1
[关键字]: