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unite throws error when trying to unite all columns if column selection is left empty #355
Description
The documentation for unite implies that unite can be used to unite all columns if column selection is left empty:
A selection of columns. If empty, all variables are selected.
However, when attempting to do so, an error is thrown:
tidyr::unite(mtcars, 'all_cols')Results in:
Error in if (!after) c(values, x) else if (after >= lengx) c(x, values) else c(x[1L:after], :
missing value where TRUE/FALSE needed
When all columns are specified explicitly, no error is thrown:
tidyr::unite(mtcars, 'all_cols', mpg:carb)Results in:
all_cols
Mazda RX4 21_6_160_110_3.9_2.62_16.46_0_1_4_4
Mazda RX4 Wag 21_6_160_110_3.9_2.875_17.02_0_1_4_4
Datsun 710 22.8_4_108_93_3.85_2.32_18.61_1_1_4_1
Hornet 4 Drive 21.4_6_258_110_3.08_3.215_19.44_1_0_3_1
Hornet Sportabout 18.7_8_360_175_3.15_3.44_17.02_0_0_3_2
Valiant 18.1_6_225_105_2.76_3.46_20.22_1_0_3_1
Duster 360 14.3_8_360_245_3.21_3.57_15.84_0_0_3_4
Merc 240D 24.4_4_146.7_62_3.69_3.19_20_1_0_4_2
Merc 230 22.8_4_140.8_95_3.92_3.15_22.9_1_0_4_2
Merc 280 19.2_6_167.6_123_3.92_3.44_18.3_1_0_4_4
Merc 280C 17.8_6_167.6_123_3.92_3.44_18.9_1_0_4_4
Merc 450SE 16.4_8_275.8_180_3.07_4.07_17.4_0_0_3_3
Merc 450SL 17.3_8_275.8_180_3.07_3.73_17.6_0_0_3_3
Merc 450SLC 15.2_8_275.8_180_3.07_3.78_18_0_0_3_3
Cadillac Fleetwood 10.4_8_472_205_2.93_5.25_17.98_0_0_3_4
Lincoln Continental 10.4_8_460_215_3_5.424_17.82_0_0_3_4
Chrysler Imperial 14.7_8_440_230_3.23_5.345_17.42_0_0_3_4
Fiat 128 32.4_4_78.7_66_4.08_2.2_19.47_1_1_4_1
Honda Civic 30.4_4_75.7_52_4.93_1.615_18.52_1_1_4_2
Toyota Corolla 33.9_4_71.1_65_4.22_1.835_19.9_1_1_4_1
Toyota Corona 21.5_4_120.1_97_3.7_2.465_20.01_1_0_3_1
Dodge Challenger 15.5_8_318_150_2.76_3.52_16.87_0_0_3_2
AMC Javelin 15.2_8_304_150_3.15_3.435_17.3_0_0_3_2
Camaro Z28 13.3_8_350_245_3.73_3.84_15.41_0_0_3_4
Pontiac Firebird 19.2_8_400_175_3.08_3.845_17.05_0_0_3_2
Fiat X1-9 27.3_4_79_66_4.08_1.935_18.9_1_1_4_1
Porsche 914-2 26_4_120.3_91_4.43_2.14_16.7_0_1_5_2
Lotus Europa 30.4_4_95.1_113_3.77_1.513_16.9_1_1_5_2
Ford Pantera L 15.8_8_351_264_4.22_3.17_14.5_0_1_5_4
Ferrari Dino 19.7_6_145_175_3.62_2.77_15.5_0_1_5_6
Maserati Bora 15_8_301_335_3.54_3.57_14.6_0_1_5_8
Volvo 142E 21.4_4_121_109_4.11_2.78_18.6_1_1_4_2
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SteadyGiant commentedon Sep 5, 2017
I'm having the same issue. Running
unite(data = vars, col = name, sep = " ")throws this exact error. But runningunite(data = vars, col = name, V1:V6, sep = " "), whereV1:V6are column names of thevarstibble, runs without error and returns the desired output.?unitedocumentation explicitly states that the...argument can be left empty and, if so,unite()will select all variables.abautistah commentedon Oct 11, 2017
Yeah same problem, trying to leave ... argument empty to use all columns but it is not working. Instead I got all colnames and used it as argument.
columnNames <- colnames(data)unitedData <- data%>%unite(united, columNames ,sep=".")Add test for #355