R: Verbreitung-Funktion-Daten-frame mit Duplikaten

Habe ich einen Daten-frame, die ich brauche, um pivot-aber der Daten-frame hat doppelte IDS, so spread Funktion gibt einen Fehler Error: Duplicate identifiers for rows (5, 6)

Dimension = c("A","A","B","B","A","A")   
Date = c("Mon","Tue","Mon","Wed","Fri","Fri")    
Metric = c(23,25,7,9,7,8)
df = data.frame(Dimension,Date,Metric)
df

  Dimension Date Metric
1         A  Mon     23
2         A  Tue     25
3         B  Mon      7
4         B  Wed      9
5         A  Fri      7
6         A  Fri      8

library(tidyr)
df1 = spread(df, Date, Metric, fill = " ")

Error: Duplicate identifiers for rows (5, 6)

Ich dann konsolidierten die Zeilen und klebte die Metric:

dfa = aggregate(df[3], df[-3], 
                FUN = function(X) paste(unique(X), collapse=", "))

  Dimension Date Metric
1         A  Fri   7, 8
2         A  Mon     23
3         B  Mon      7
4         A  Tue     25
5         B  Wed      9

Dann wiederholen und natürlich funktioniert es jetzt:

df1 = spread(dfa, Date, Metric, fill = " ")
df1
  Dimension  Fri Mon Tue Wed
1         A 7, 8  23  25    
2         B        7       9

Frage: gibt es eine "einfachere" Weg, dies zu tun, oder ist meine oben beschriebene Methode effizient genug, so brauche ich nicht zu verlieren Schlaf über Sie? Danke!

BEARBEITEN.
Alle codes - mine und 2 akrun die Arbeit mit diesem feinen kleinen Datensatz. Allerdings akrun ist dplyr - version bricht auf meinem realen Datensatz. Hier ist dput.

structure(list(Dimension = c(10994030020, 10994030020, 10994030020, 
10994030020, 10994030020, 10994030020, 10994030020, 10994030020, 
10994030020, 10994030020, 10994030020, 10994030020, 10994030020, 
10994030020, 10994030020, 10994030020, 10994030020, 10994030020, 
10994030020, 10994030020, 10994030020, 10994030020, 10994030020, 
10994030020, 10994030020, 10994030020, 10994030020, 10994030020, 
10994030020, 10994030020, 10994030020, 10994030020, 10994030020, 
10994030020, 10994030020, 10994030020, 10994030020, 10994030020, 
10994030020, 10994030020, 10994030020, 10994030020, 10994030020, 
10994030020, 10994030020, 10994030020, 10994030020, 10994030020, 
10994030020, 12300245685, 12300245685, 12300245685, 12300245685, 
12300245685, 12300245685, 12300245685, 12300245685, 12300245685, 
12300245685, 12300245685, 12300245685, 12300245685, 12300245685, 
12300245685, 12300245685, 12300245685, 12300245685, 12300245685, 
12300245685, 12300245685, 12300245685, 12300245685, 12300245685, 
12300245685, 12300245685, 12300245685, 12300245685, 12300245685, 
12300245685, 12300245685, 12300245685, 12300245685, 12300245685, 
12303485675, 12303485675, 12303485675, 12303485675, 12303485675, 
12701670437, 12701670437, 12701670437, 12701670437, 12701670437, 
12701670437, 12701670437, 12701670437, 12701670437, 12701670437, 
12701670437, 12701670437, 12701670437, 12701670437, 12701670437, 
12701670437), Date = structure(c(1L, 3L, 5L, 7L, 9L, 10L, 11L, 
12L, 13L, 14L, 16L, 18L, 19L, 20L, 22L, 23L, 24L, 26L, 27L, 28L, 
30L, 32L, 33L, 34L, 40L, 41L, 42L, 47L, 48L, 49L, 51L, 52L, 53L, 
54L, 55L, 58L, 59L, 60L, 61L, 62L, 63L, 65L, 66L, 68L, 69L, 70L, 
74L, 75L, 76L, 2L, 3L, 5L, 7L, 8L, 10L, 11L, 15L, 17L, 20L, 21L, 
24L, 25L, 28L, 30L, 31L, 34L, 36L, 42L, 43L, 46L, 48L, 49L, 53L, 
54L, 56L, 65L, 67L, 68L, 69L, 70L, 71L, 72L, 73L, 7L, 24L, 30L, 
38L, 65L, 4L, 6L, 7L, 24L, 28L, 29L, 30L, 35L, 37L, 39L, 44L, 
45L, 50L, 57L, 64L, 65L), .Label = c("16", "analog tuner", "aspect ratio", 
"assembled in country of origin", "backlight technology", "battery type", 
"brand", "brightness", "color class", "component video", "composite video", 
"country of origin", "depth w/stand", "digital audio output", 
"digital tuner", "display technology", "features", "green compliance certificate/authority", 
"green compliant", "hdmi", "headphone jack", "height w/stand", 
"limited warranty", "manufacturer", "maximum resolution", "media player", 
"motion interpolation technology", "mpn", "multi pack indicator", 
"name", "native contrast ratio", "number of hdmi ports", "number of usb ports", 
"operating power consumption", "origin of components", "package contents", 
"primary color", "product dimensions", "product in in (l x w x h)", 
"product model", "product series", "product type", "remote control incl", 
"remote included", "resolution", "response time", "rms output power", 
"scan format", "screen size", "shipping weight (in lb)", "sound system", 
"speaker output power (w)", "speakers", "standard refresh rate", 
"standby power consumption", "total number of hdmi ports", "tv definition", 
"tv features", "tv refresh rate (hz)", "tv resolution", "tv screen size (in)", 
"tv screen size range", "tv speakers", "tv technology", "unspsc", 
"usb", "vertical viewing angle", "vesa mount standard", "vga", 
"video signal standard", "viewing angle", "warranty length", 
"wattage", "weight (approx)", "weight w/stand (approx)", "width w/stand"
), class = "factor"), Metric = structure(c(40L, 13L, 57L, 69L, 
43L, 72L, 72L, 45L, 38L, 72L, 55L, 44L, 72L, 72L, 15L, 3L, 69L, 
72L, 46L, 26L, 70L, 27L, 1L, 29L, 26L, 54L, 58L, 12L, 39L, 25L, 
42L, 11L, 72L, 37L, 28L, 52L, 36L, 39L, 24L, 19L, 72L, 33L, 72L, 
18L, 72L, 49L, 6L, 10L, 23L, 62L, 13L, 48L, 64L, 31L, 72L, 72L, 
41L, 66L, 72L, 72L, 64L, 16L, 63L, 65L, 4L, 32L, 21L, 58L, 71L, 
35L, 8L, 20L, 72L, 37L, 17L, 33L, 14L, 7L, 72L, 50L, 14L, 2L, 
34L, 59L, 59L, 60L, 5L, 33L, 51L, 47L, 67L, 67L, 53L, 61L, 68L, 
51L, 43L, 30L, 72L, 9L, 22L, 49L, 56L, 33L), .Label = c("1", 
"1-year limited", "1 Year", "1,000:1", "1,140 x 145 x 705 in ; 65.6 lb", 
"10.40 lb", "100 x 100", "1080p", "1080p (HDTV)", "11.20 lb", 
"14", "14 W", "16:9", "178 degrees", "18.30 in", "1920 x 1080", 
"2", "200 x 100", "21", "22 in", "22 in FHD LED TV; Remote Control", 
"25.4", "26.20 in", "29", "29 in", "29L1350U", "3", "300 mW", 
"33.80 W", "36.5 x 6.5 x 23.0", "365 Nit", "50 W", "52161505", 
"6 W", "6.50 ms", "60", "60 Hz", "7.10 in", "720p", "9", "ATSC", 
"Audyssey EQ", "Black", "CEC", "China", "ClearScan 120 Hz", "Does Not Contain a Battery", 
"Edge LED", "HDTV", "HDTV 1080p", "Imported", "Internet Apps", 
"KDL40W600B", "L1350U", "LCD", "LCD, Internet Connected, LED", 
"LED", "LED-LCD TV", "LG", "LG 47LY340C - 47 in - commercial use LED-backlit L", 
"No", "NTSC", "PLED2243A", "ProScan", "PROSCAN PLED2243A 22 in 1080p 60 Hz LED HDTV - PTR", 
"Sleep Timer; Auto Program", "Sony", "Sony KDL40W600B 40 in 1080p 60 Hz Smart LED TV (20", 
"Toshiba", "Toshiba 29L1350U 29 in 720p LED-LCD TV - 16:9 - HD", 
"yes", "Yes"), class = "factor")), .Names = c("Dimension", "Date", 
"Metric"), class = c("data.table", "data.frame"), row.names = c(NA, 
-104L), .internal.selfref = <pointer: 0x00000000003d0788>)
  • Könnten Sie fun.aggregate im dcast", d.h. library(data.table);dcast(setDT(df), Dimension~Date, value.var='Metric', fun.aggregate=function(x) toString(unique(x))) Wenn Sie wollen stick mit spread werden kann df %>% group_by(Dimension, Date) %>% summarise(Metric=toString(unique(Metric))) %>% spread(Date, Metric)
  • In Bezug auf die Effizienz Teil aggregate wäre langsam auf große datasets. Also, ändern Sie ihn auf dplyr/tidyr effizienter wäre. Auch die data.table Methode sollte kompakt und auch leistungsfähig.
  • Ach ja, ordentlich! Danke! (nur dcast wurde nicht gefunden in data.table hatte zu installieren reshape2). Mein dataset ist in der Regel Hunderte von tausenden von Zeilen. Möchten Sie die Einrichtung ein Kommentar als eine Antwort (vielleicht mit dem timing, wenn Sie Zeit haben, um es auszuführen?) so konnte ich vote und zu akzeptieren?
  • Ich sollte erwähnt haben, dass es von der devel-version von data.table
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