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Padd vector by index

Source: R/invictor.R
padders.Rd

Padd vector by index

Pad vector front %[+%

Pad vector rear %+]%

Pad vector front + rear %[+]%

Usage

x %[+% j

x %+]% j

x %[+]% j

Arguments

x

A vector

j

A one, or two element vector. One element: Pad front or rear by j 0s, or, front by floor(j/2) and rear by ceiling(j/2). Two elements: Pad j[1] times the value passed in j[2].

Value

A padded version of x

Examples


x <- rnorm(100)

# Pad front with 10 zeros
x%[+%10
#>   [1]  0.000000000  0.000000000  0.000000000  0.000000000  0.000000000
#>   [6]  0.000000000  0.000000000  0.000000000  0.000000000  0.000000000
#>  [11] -0.429380087  1.360461327 -0.070857431 -0.272153684 -2.446680029
#>  [16]  0.065486641 -1.098508902 -0.633178176 -2.063654451  2.648932029
#>  [21] -1.153398386 -0.340637876  0.786362576 -1.270513110  0.542141549
#>  [26]  0.075105900  0.558514422  0.415406399 -1.452299769  0.941206122
#>  [31] -0.338935872 -0.075574247  0.040204392  0.124301066 -0.998432551
#>  [36]  1.233390065  0.340424488 -0.472702482  0.708753061 -1.528958715
#>  [41]  0.237425345 -1.312814246  0.747028587 -1.562518435  0.071053360
#>  [46] -0.639534770 -0.845195739  0.675244698  1.153375794 -1.686504742
#>  [51] -0.902814949  1.317633698  1.100189745  1.203767839 -1.431270777
#>  [56]  1.382910861  0.003125940 -0.077886824  0.441428226  0.128922896
#>  [61] -0.830214260 -0.503592910 -1.193641182 -0.751723323  1.455841403
#>  [66] -0.828603533  0.289774460 -0.480053484 -0.604829354  1.460110180
#>  [71]  0.149679354 -1.433321100 -0.010303319 -0.212236035 -0.906340179
#>  [76] -2.102152479  1.893360464 -0.968125837 -0.102603036  0.239959572
#>  [81]  0.060898893 -2.177576028 -0.117860143  0.112294787  0.007886198
#>  [86]  1.877743872  2.158756554  0.709714522  0.766983379 -0.308211421
#>  [91]  1.012001849 -0.919051597  0.563380077  0.322482749  0.366674363
#>  [96]  1.129835153 -0.941498076  0.217837643  1.415412293 -0.383733048
#> [101] -0.174086374 -0.221744517 -1.009528722  0.480725266  1.604407328
#> [106] -1.515024529 -1.416023914  0.876777327  0.624132413  2.112277288
# Same as
x%[+%c(10,0)
#>   [1]  0.000000000  0.000000000  0.000000000  0.000000000  0.000000000
#>   [6]  0.000000000  0.000000000  0.000000000  0.000000000  0.000000000
#>  [11] -0.429380087  1.360461327 -0.070857431 -0.272153684 -2.446680029
#>  [16]  0.065486641 -1.098508902 -0.633178176 -2.063654451  2.648932029
#>  [21] -1.153398386 -0.340637876  0.786362576 -1.270513110  0.542141549
#>  [26]  0.075105900  0.558514422  0.415406399 -1.452299769  0.941206122
#>  [31] -0.338935872 -0.075574247  0.040204392  0.124301066 -0.998432551
#>  [36]  1.233390065  0.340424488 -0.472702482  0.708753061 -1.528958715
#>  [41]  0.237425345 -1.312814246  0.747028587 -1.562518435  0.071053360
#>  [46] -0.639534770 -0.845195739  0.675244698  1.153375794 -1.686504742
#>  [51] -0.902814949  1.317633698  1.100189745  1.203767839 -1.431270777
#>  [56]  1.382910861  0.003125940 -0.077886824  0.441428226  0.128922896
#>  [61] -0.830214260 -0.503592910 -1.193641182 -0.751723323  1.455841403
#>  [66] -0.828603533  0.289774460 -0.480053484 -0.604829354  1.460110180
#>  [71]  0.149679354 -1.433321100 -0.010303319 -0.212236035 -0.906340179
#>  [76] -2.102152479  1.893360464 -0.968125837 -0.102603036  0.239959572
#>  [81]  0.060898893 -2.177576028 -0.117860143  0.112294787  0.007886198
#>  [86]  1.877743872  2.158756554  0.709714522  0.766983379 -0.308211421
#>  [91]  1.012001849 -0.919051597  0.563380077  0.322482749  0.366674363
#>  [96]  1.129835153 -0.941498076  0.217837643  1.415412293 -0.383733048
#> [101] -0.174086374 -0.221744517 -1.009528722  0.480725266  1.604407328
#> [106] -1.515024529 -1.416023914  0.876777327  0.624132413  2.112277288

# Pad rear with zeros
x%+]%10
#>   [1] -0.429380087  1.360461327 -0.070857431 -0.272153684 -2.446680029
#>   [6]  0.065486641 -1.098508902 -0.633178176 -2.063654451  2.648932029
#>  [11] -1.153398386 -0.340637876  0.786362576 -1.270513110  0.542141549
#>  [16]  0.075105900  0.558514422  0.415406399 -1.452299769  0.941206122
#>  [21] -0.338935872 -0.075574247  0.040204392  0.124301066 -0.998432551
#>  [26]  1.233390065  0.340424488 -0.472702482  0.708753061 -1.528958715
#>  [31]  0.237425345 -1.312814246  0.747028587 -1.562518435  0.071053360
#>  [36] -0.639534770 -0.845195739  0.675244698  1.153375794 -1.686504742
#>  [41] -0.902814949  1.317633698  1.100189745  1.203767839 -1.431270777
#>  [46]  1.382910861  0.003125940 -0.077886824  0.441428226  0.128922896
#>  [51] -0.830214260 -0.503592910 -1.193641182 -0.751723323  1.455841403
#>  [56] -0.828603533  0.289774460 -0.480053484 -0.604829354  1.460110180
#>  [61]  0.149679354 -1.433321100 -0.010303319 -0.212236035 -0.906340179
#>  [66] -2.102152479  1.893360464 -0.968125837 -0.102603036  0.239959572
#>  [71]  0.060898893 -2.177576028 -0.117860143  0.112294787  0.007886198
#>  [76]  1.877743872  2.158756554  0.709714522  0.766983379 -0.308211421
#>  [81]  1.012001849 -0.919051597  0.563380077  0.322482749  0.366674363
#>  [86]  1.129835153 -0.941498076  0.217837643  1.415412293 -0.383733048
#>  [91] -0.174086374 -0.221744517 -1.009528722  0.480725266  1.604407328
#>  [96] -1.515024529 -1.416023914  0.876777327  0.624132413  2.112277288
#> [101]  0.000000000  0.000000000  0.000000000  0.000000000  0.000000000
#> [106]  0.000000000  0.000000000  0.000000000  0.000000000  0.000000000
# Same as
x%+]%c(10,0)
#>   [1] -0.429380087  1.360461327 -0.070857431 -0.272153684 -2.446680029
#>   [6]  0.065486641 -1.098508902 -0.633178176 -2.063654451  2.648932029
#>  [11] -1.153398386 -0.340637876  0.786362576 -1.270513110  0.542141549
#>  [16]  0.075105900  0.558514422  0.415406399 -1.452299769  0.941206122
#>  [21] -0.338935872 -0.075574247  0.040204392  0.124301066 -0.998432551
#>  [26]  1.233390065  0.340424488 -0.472702482  0.708753061 -1.528958715
#>  [31]  0.237425345 -1.312814246  0.747028587 -1.562518435  0.071053360
#>  [36] -0.639534770 -0.845195739  0.675244698  1.153375794 -1.686504742
#>  [41] -0.902814949  1.317633698  1.100189745  1.203767839 -1.431270777
#>  [46]  1.382910861  0.003125940 -0.077886824  0.441428226  0.128922896
#>  [51] -0.830214260 -0.503592910 -1.193641182 -0.751723323  1.455841403
#>  [56] -0.828603533  0.289774460 -0.480053484 -0.604829354  1.460110180
#>  [61]  0.149679354 -1.433321100 -0.010303319 -0.212236035 -0.906340179
#>  [66] -2.102152479  1.893360464 -0.968125837 -0.102603036  0.239959572
#>  [71]  0.060898893 -2.177576028 -0.117860143  0.112294787  0.007886198
#>  [76]  1.877743872  2.158756554  0.709714522  0.766983379 -0.308211421
#>  [81]  1.012001849 -0.919051597  0.563380077  0.322482749  0.366674363
#>  [86]  1.129835153 -0.941498076  0.217837643  1.415412293 -0.383733048
#>  [91] -0.174086374 -0.221744517 -1.009528722  0.480725266  1.604407328
#>  [96] -1.515024529 -1.416023914  0.876777327  0.624132413  2.112277288
#> [101]  0.000000000  0.000000000  0.000000000  0.000000000  0.000000000
#> [106]  0.000000000  0.000000000  0.000000000  0.000000000  0.000000000

# Pad front + rear with NA
x%[+]%c(NA,10)

# Pad front + rear of a character vector
"yes"%[+]%c(2,"no")
#> [1] "no"  "yes" "no" 
"yes"%[+]%c(1,"no")
#> [1] "yes" "no" 
"yes"%[+]%c(0,"no")
#> [1] "yes"