Sample usages from package functions
maR
library(Rinvent)
exampleDataR= data.table::as.data.table(exampleDataR)
exampleDataR = exampleDataR[order(location,item,date)]
exampleDataR[,ma5:= maR(sales,4),list(location,item)]
head(exampleDataR,10)
#> location item date sales ma5
#> 1: ankara tea 4/23/1920 22 NA
#> 2: ankara tea 4/24/1920 30 22.00
#> 3: ankara tea 4/25/1920 29 26.00
#> 4: ankara tea 4/26/1920 34 27.00
#> 5: ankara tea 4/27/1920 9 28.75
#> 6: ankara tea 4/28/1920 15 25.50
#> 7: ankara tea 4/29/1920 40 21.75
#> 8: ankara tea 4/30/1920 7 24.50
#> 9: ankara tea 5/1/1920 26 17.75
#> 10: ankara tea 5/10/1920 39 22.00readparquetR
temp <- tempfile()
arrow::write_parquet(mtcars, paste(temp,".parquet"))
readparquetR(paste(temp,".parquet"))
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> 1: 21.0 6 160.0 110 3.90 2.620 16.46 0 1 4 4
#> 2: 21.0 6 160.0 110 3.90 2.875 17.02 0 1 4 4
#> 3: 22.8 4 108.0 93 3.85 2.320 18.61 1 1 4 1
#> 4: 21.4 6 258.0 110 3.08 3.215 19.44 1 0 3 1
#> 5: 18.7 8 360.0 175 3.15 3.440 17.02 0 0 3 2
#> 6: 18.1 6 225.0 105 2.76 3.460 20.22 1 0 3 1
#> 7: 14.3 8 360.0 245 3.21 3.570 15.84 0 0 3 4
#> 8: 24.4 4 146.7 62 3.69 3.190 20.00 1 0 4 2
#> 9: 22.8 4 140.8 95 3.92 3.150 22.90 1 0 4 2
#> 10: 19.2 6 167.6 123 3.92 3.440 18.30 1 0 4 4
#> 11: 17.8 6 167.6 123 3.92 3.440 18.90 1 0 4 4
#> 12: 16.4 8 275.8 180 3.07 4.070 17.40 0 0 3 3
#> 13: 17.3 8 275.8 180 3.07 3.730 17.60 0 0 3 3
#> 14: 15.2 8 275.8 180 3.07 3.780 18.00 0 0 3 3
#> 15: 10.4 8 472.0 205 2.93 5.250 17.98 0 0 3 4
#> 16: 10.4 8 460.0 215 3.00 5.424 17.82 0 0 3 4
#> 17: 14.7 8 440.0 230 3.23 5.345 17.42 0 0 3 4
#> 18: 32.4 4 78.7 66 4.08 2.200 19.47 1 1 4 1
#> 19: 30.4 4 75.7 52 4.93 1.615 18.52 1 1 4 2
#> 20: 33.9 4 71.1 65 4.22 1.835 19.90 1 1 4 1
#> 21: 21.5 4 120.1 97 3.70 2.465 20.01 1 0 3 1
#> 22: 15.5 8 318.0 150 2.76 3.520 16.87 0 0 3 2
#> 23: 15.2 8 304.0 150 3.15 3.435 17.30 0 0 3 2
#> 24: 13.3 8 350.0 245 3.73 3.840 15.41 0 0 3 4
#> 25: 19.2 8 400.0 175 3.08 3.845 17.05 0 0 3 2
#> 26: 27.3 4 79.0 66 4.08 1.935 18.90 1 1 4 1
#> 27: 26.0 4 120.3 91 4.43 2.140 16.70 0 1 5 2
#> 28: 30.4 4 95.1 113 3.77 1.513 16.90 1 1 5 2
#> 29: 15.8 8 351.0 264 4.22 3.170 14.50 0 1 5 4
#> 30: 19.7 6 145.0 175 3.62 2.770 15.50 0 1 5 6
#> 31: 15.0 8 301.0 335 3.54 3.570 14.60 0 1 5 8
#> 32: 21.4 4 121.0 109 4.11 2.780 18.60 1 1 4 2
#> mpg cyl disp hp drat wt qsec vs am gear carb
readparquetR(pathtoread=paste(temp,".parquet"), sample=T)
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> 1: 21 6 160 110 3.9 2.62 16.46 0 1 4 4
readparquetR(pathtoread=paste(temp,".parquet"),
collist = c("mpg","cyl","vs"),
format="parquet",
where="cyl==4 & vs!='0'")
#> mpg cyl vs
#> 1: 22.8 4 1
#> 2: 24.4 4 1
#> 3: 22.8 4 1
#> 4: 32.4 4 1
#> 5: 30.4 4 1
#> 6: 33.9 4 1
#> 7: 21.5 4 1
#> 8: 27.3 4 1
#> 9: 30.4 4 1
#> 10: 21.4 4 1date_to_yyyymmdd
date_to_yyyymmdd("2022-02-28")
#> [1] "2022-02-28"
date_to_yyyymmdd("02/28/2022")
#> [1] "2022-02-28"
date_to_yyyymmdd("28.02.2022")
#> [1] "2022-02-28"
date_to_yyyymmdd("Feb 28, 2022")
#> [1] "2022-02-28"
date_to_yyyymmdd("28.02.2022", smart_format = F ,forceformat="%d.%m.%Y" )
#> [1] "2022-02-28"