Sometime after 1000 squares this fails, I do not yet know why :-) !

Code

first6-ig-van-01january2016-square-piechart.R

library(ggplot2)
library(waffle)
library(plotrix)
library(plyr)

tc <-
     function(x) {
         return (head(color.id(x),n=1))
     }

data6 = read.csv(
  file="6datapoints-01jan2016.csv",
    stringsAsFactors=F)

data6$colourname <- sapply(data6$colour, tc)

countcolourname = count(data6, "colourname")
countcolourname <- countcolourname[order(-countcolourname$freq),]

colour_vector <-setNames(countcolourname$freq, countcolourname$colourname)
p = waffle(colour_vector, rows=1, size=0.5, 
    colors=I(data6$colour))

ggsave("6datapoints-squarepiechart.png", p, width = 26.666666667, height = 26.666666667, dpi = 72, limitsize = FALSE) # 26.6666667 = 1920/72dpi
warnings()

Dataset

6datapoints-01jan2016.csv

colour,id,dayofweek-month-dayofmonth,daynumber
#8B7D7D,1152722080165873450_545005592,FriJan1,1
#4C3F3F,1152722094194289757_285178194,FriJan1,1
#716666,1152722146880749719_340863,FriJan1,1
#8B7D7D,1152722080165873450_545005592,SatJan1,1
#4C3F3F,1152722094194289757_285178194,SatJan1,1
#716666,1152722146880749719_340863,SatJan1,1

The square piechart

On github you can find the six square square pie chart at 6datapoints-squarepiechart.png

And here is the flickr embed:

6datapoints-squarepiechart