我需要构建一个平行坐标图，我正在尝试使用lattice::parallellplot它。现在，它似乎无法在 data.frame 中找到变量..
df <- structure(list(Patient = structure(c(1L, 1L, 2L, 2L, 3L, 3L), .Label = c("K1",
"K10", "K11", "K12", "K13", "K14", "K3", "K5", "K6", "K7", "K8",
"K9", "M1", "M10", "M11", "M12", "M13", "M14", "M15", "M16",
"M17", "M18", "M3", "M4", "M5", "M6", "M7", "M8", "M9", "P11",
"P14", "P15", "P17", "P19", "P20", "P21", "P22", "P24", "P25zi",
"P26zi", "P27zi", "P28zi", "P29zi", "P30zi", "P31zi", "P32zi",
"P33zi", "P34zi", "P35zi", "P36zi", "P37zi", "P38zi", "P39zi",
"P40zi", "P42zi", "P43zi", "P44zi", "P45zi", "P47zi", "P48zi",
"P49zi", "P6"), class = "factor"), Session = c("Control", "Control",
"Control", "Control", "Control", "Control"), Stimulation = structure(c(1L,
1L, 1L, 1L, 1L, 1L), .Label = c("Control", "Pre-op", "Stim OFF",
"Stim ON"), class = "factor"), Medication = structure(c(1L, 1L,
1L, 1L, 1L, 1L), .Label = c("Control", "Med OFF", "Med ON"), class = "factor"),
Pace = c("Fast", "Self paced", "Fast", "Self paced", "Fast",
"Self paced"), Task = c("AMR", "AMR", "AMR", "AMR", "AMR",
"AMR"), rpvi = c(0.0182795199284812, 0.0663539828711965,
0.0341240824873636, 0.12187724470919, 0.072604166062397,
0.173523783116511), npvi = c(13.3513362238, 18.2878243201769,
14.2017869466867, 30.4704307031096, 27.7354960871263, 47.2650462416463
), cov = c(0.149873573597108, 0.161675840793806, 0.128829768483374,
0.248221179697023, 0.263336212564805, 0.411141115364702),
PatientGroup = c("Normal control", "Normal control", "Normal control",
"Normal control", "Normal control", "Normal control")), .Names = c("Patient",
"Session", "Stimulation", "Medication", "Pace", "Task", "rpvi",
"npvi", "cov", "PatientGroup"), vars = list(Patient, Session,
Stimulation, Medication, Pace), drop = TRUE, row.names = c(NA,
6L), class = c("grouped_df", "tbl_df", "tbl", "data.frame"))
> latice:parallelplot
> head(df)
Patient Session Stimulation Medication Pace Task rpvi npvi cov PatientGroup
1 K1 Control Control Control Fast AMR 0.01827952 13.35134 0.1498736 Normal control
2 K1 Control Control Control Self paced AMR 0.06635398 18.28782 0.1616758 Normal control
3 K10 Control Control Control Fast AMR 0.03412408 14.20179 0.1288298 Normal control
4 K10 Control Control Control Self paced AMR 0.12187724 30.47043 0.2482212 Normal control
5 K11 Control Control Control Fast AMR 0.07260417 27.73550 0.2633362 Normal control
6 K11 Control Control Control Self paced AMR 0.17352378 47.26505 0.4111411 Normal Control
> parallelplot(nPVI | PatientGroup,data=df)
Error in parallelplot(npvi | PatientGroup, data = df) :
object 'npvi' not found
为什么parallelplot函数找不到数据框中的列？
关于会议的一些信息：
> sessionInfo()
R version 3.1.0 (2014-04-10)
Platform: x86_64-apple-darwin13.1.0 (64-bit)
locale:
[1] sv_SE.UTF-8/sv_SE.UTF-8/sv_SE.UTF-8/C/sv_SE.UTF-8/sv_SE.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] ggplot2_1.0.0 GGally_0.4.8 lattice_0.20-29
loaded via a namespace (and not attached):
[1] colorspace_1.2-4 digest_0.6.4 grid_3.1.0 gtable_0.1.2 MASS_7.3-34 munsell_0.4.2 plyr_1.8.1 proto_0.3-10 Rcpp_0.11.2 reshape_0.8.5
[11] reshape2_1.4 scales_0.2.4 stringr_0.6.2 tools_3.1.0
> searchpaths()
[1] ".GlobalEnv" "/Library/Frameworks/R.framework/Versions/3.1/Resources/library/ggplot2"
[3] "/Users/frkkan96/Library/R/3.1/library/GGally" "/Library/Frameworks/R.framework/Versions/3.1/Resources/library/lattice"
[5] "tools:rstudio" "/Library/Frameworks/R.framework/Versions/3.1/Resources/library/stats"
[7] "/Library/Frameworks/R.framework/Versions/3.1/Resources/library/graphics" "/Library/Frameworks/R.framework/Versions/3.1/Resources/library/grDevices"
[9] "/Library/Frameworks/R.framework/Versions/3.1/Resources/library/utils" "/Library/Frameworks/R.framework/Versions/3.1/Resources/library/datasets"
[11] "/Library/Frameworks/R.framework/Versions/3.1/Resources/library/methods" "Autoloads"
[13] "/Library/Frameworks/R.framework/Resources/library/base"
