Generating random missing values on a data matrix

Description

The function generates a number of missing values (NA) completely at random on a data matrix. Totally missing rows (i.e., rows with all NA) are avoided.

Usage

missing.gen(mat, nummiss)

Arguments

Details

The function generates a number of missing values (NA) completely at random on a data matrix. Totally missing rows (i.e., rows with all NA) are avoided.

Value

The data matrix with missing values (NA).

Author(s)

Nadia Solaro, Alessandro Barbiero, Giancarlo Manzi, Pier Alda Ferrari

See Also

missing.gen0

Examples

sigma <- matrix(0.4, 4, 4)
diag(sigma) <- 1
x0 <- rmvnorm(n=100, mean=rep(0, 4), sigma=sigma)
x0 # complete matrix
x <- missing.gen(x0, 50)
x # matrix with 50 missing values

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(GenForImp)
Loading required package: mvtnorm
Loading required package: sn
Loading required package: stats4

Attaching package: 'sn'

The following object is masked from 'package:stats':

    sd

> png(filename="/home/ddbj/snapshot/RGM3/R_CC/result/GenForImp/missing.gen.Rd_%03d_medium.png", width=480, height=480)
> ### Name: missing.gen
> ### Title: Generating random missing values on a data matrix
> ### Aliases: missing.gen
> ### Keywords: classes multivariate NA
> 
> ### ** Examples
> 
> sigma <- matrix(0.4, 4, 4)
> diag(sigma) <- 1
> x0 <- rmvnorm(n=100, mean=rep(0, 4), sigma=sigma)
> x0 # complete matrix
              [,1]        [,2]        [,3]         [,4]
  [1,]  0.65911650 -0.33331110  0.92160986  1.191047218
  [2,] -0.97629778  0.37953656 -1.55386992 -1.127791828
  [3,] -0.04720913 -0.58606968  0.74847725  0.609088748
  [4,]  0.61129437  0.88537322 -0.74702612 -0.637236006
  [5,] -0.12842654  0.10971713 -0.52177286 -0.067578832
  [6,]  0.75896943 -0.63242417 -0.26258698  0.873436592
  [7,]  0.23827133  0.37605678 -0.29748498 -0.260944278
  [8,] -0.96512529 -0.76402807 -0.33611555  0.960044948
  [9,] -0.09142860  1.41522037 -0.56131672 -0.015840755
 [10,] -1.28898534  0.82731274  0.26209545  0.028187917
 [11,]  1.08848018  1.08774018  0.44663401  2.277444058
 [12,]  0.20239149  0.49657607  0.36386048  0.003071069
 [13,] -0.30876106  0.10649953  0.01624501  1.827849608
 [14,]  0.45718557  0.73528992 -1.02160523  0.958628557
 [15,] -0.95542422 -1.80143390 -0.77911644 -2.562178742
 [16,] -0.09625827 -1.08458374  0.31657756 -0.728423514
 [17,] -0.72860965 -0.33460039 -0.22134101 -1.554741351
 [18,]  0.13467581 -0.28493411 -1.03705698 -0.399347299
 [19,]  0.52698943  0.64204252 -0.68263663 -0.392335844
 [20,] -1.64894878 -0.84003164 -0.94553324 -0.699718484
 [21,]  0.04177614  0.61652527  0.43348377  0.850892610
 [22,] -0.65255709  0.59212214  0.31917875  0.157072780
 [23,] -1.01898476  0.16907537 -0.31649785  0.940220646
 [24,]  0.34221281 -1.78823411 -2.34172916 -0.986721444
 [25,]  1.17356245  1.34681014  0.92968951  0.807312161
 [26,]  0.56186163  1.49987668  0.37937205  1.609628155
 [27,] -0.14419627  0.11237772 -1.08281431 -1.410903237
 [28,]  0.43471086 -0.63245863  0.72686655  1.519624992
 [29,]  1.31943059  1.40455267 -0.95041039 -0.084509771
 [30,]  0.15071306  0.39806638  0.71314322  0.542321667
 [31,]  0.06881901  0.68371377  0.41197381  0.345768337
 [32,] -0.05729902 -0.08671733 -1.08994372 -0.195221008
 [33,] -1.16459589 -0.26390110 -0.19328159  0.281006064
 [34,] -1.36450546 -1.44313563 -0.48093300 -0.717994530
 [35,] -0.44887600 -1.27143270  0.13370673 -0.013783312
 [36,] -0.74449061 -1.33607331 -3.34093724 -2.113443164
 [37,] -0.43355700 -1.13811810  0.19892824  0.204447922
 [38,] -1.32169809 -0.62177593 -1.22447931 -0.548409911
 [39,]  0.46781018 -0.77010747  0.69154779  0.375059818
 [40,]  0.65513941 -1.06695438  0.48585316  0.152154514
 [41,]  1.08381678  0.09107419  1.07343748  0.186962159
 [42,]  0.40851667  1.62078381  1.02851592  0.055539876
 [43,] -0.43297823 -1.75042359 -0.38471056 -0.464807194
 [44,] -0.34326087 -0.43023342 -0.74181118 -0.304233785
 [45,]  0.70029383  0.28042332 -0.87439959 -0.658390653
 [46,]  0.29278737 -1.93864821 -1.95976927 -0.887221684
 [47,]  0.36799756  0.66822889 -0.64932378 -1.443119858
 [48,]  0.88233979  0.60531030  0.55191571 -0.107283182
 [49,]  0.03872267 -1.32126762  0.36510610 -0.475244020
 [50,]  1.10825886  0.93917666  1.02908110  0.125881526
 [51,]  0.69410028  1.62879739  2.55159510  2.301717085
 [52,] -0.69304801  1.50884895  1.67004555 -0.396016234
 [53,] -0.04634516  1.86270973  1.06911015  0.954604692
 [54,]  0.12902751 -0.48704483 -0.39441835  0.989061281
 [55,]  0.74342926  0.36045239  0.02224567  0.082466535
 [56,] -1.25118645 -1.39102069 -1.32213573  0.199272860
 [57,] -1.65483510  0.26637252  0.73320502  0.180635410
 [58,]  1.03036194  0.55486505  0.58671952  0.181288943
 [59,] -0.92855784 -0.52050313 -1.24358883 -0.096320669
 [60,]  0.60923559  0.01224115 -0.44697800  0.145259726
 [61,]  0.16573811  0.80678068  0.06454526  0.859236467
 [62,]  1.45748566  0.20033965  1.59803393  0.858646144
 [63,] -0.13368987 -0.31916554 -2.07602146 -0.997027959
 [64,]  0.70709789 -0.50037594  0.24291981  0.094340149
 [65,] -0.05734386 -1.18871683 -0.02776583  1.040118010
 [66,] -0.45683209  0.32238116 -0.43269009 -1.560045398
 [67,]  0.19262867  0.42792662  0.20013635  0.263897327
 [68,] -0.51917260 -0.20828194 -0.09649893  0.515952747
 [69,]  0.76875167  0.97928099 -0.60842498  0.994259757
 [70,] -0.57401844 -0.31979753 -0.39852976 -0.293839355
 [71,]  0.44574651 -0.78286228  0.67732802  0.860872959
 [72,]  0.01382214 -3.50347866 -0.89190932  0.314178947
 [73,] -1.43331504 -1.23976839 -1.26546753 -0.157642437
 [74,]  1.21654211  0.84048607 -0.24037903 -0.412349970
 [75,] -0.71321677 -0.40589339 -1.06146454 -0.387413826
 [76,] -1.06934530 -0.90245569  0.29049159 -0.674047650
 [77,] -1.15371028 -0.74592942  0.29974108 -0.114228645
 [78,]  2.59039103 -0.56363434 -0.15330687  1.372953562
 [79,] -1.39598026  0.05312889  0.14913805  0.255675990
 [80,]  1.47127532  0.41061791  1.32310047  1.546090232
 [81,]  1.58650954  1.73629616  1.46094935  0.123005021
 [82,] -0.34097341 -0.70810805  1.72370527  1.376248648
 [83,]  0.01856457  0.49309434  2.03456715 -0.185176661
 [84,]  1.74623010  1.70338311 -0.37877862 -0.549465477
 [85,]  2.32607793  1.25787557  0.97900143  0.428970853
 [86,]  1.48470239  1.43935892  1.71217005  1.220591167
 [87,] -1.27177730  0.11399900 -1.33082494 -0.697988296
 [88,]  0.67984825  0.99909587 -0.22604763 -0.280530267
 [89,]  0.32480806 -0.22489570 -0.64776258  0.202174211
 [90,]  0.18534331  0.92080565 -1.45553739 -0.902169327
 [91,]  0.38858272 -0.74699128 -0.61418561  0.074640073
 [92,] -0.15603877 -0.70586588  0.48774120 -2.101621283
 [93,]  0.24500385 -0.56013223  0.20162786 -1.498879972
 [94,]  0.89520242  0.73670128  1.28209018 -0.723480115
 [95,] -0.65756120 -1.21044766  0.44562943 -0.194352604
 [96,]  0.80358721  2.03053445  0.26257551 -0.146347153
 [97,] -0.98633734 -0.64823098 -1.83090053 -1.064402321
 [98,]  0.98505558  1.63204372  0.28637085  0.572921649
 [99,]  0.49526330 -0.47829192  0.42367047  0.609106675
[100,]  0.93513553 -0.88636329  1.27365919  0.375093673
> x <- missing.gen(x0, 50)
> x # matrix with 50 missing values
              [,1]        [,2]        [,3]         [,4]
  [1,]  0.65911650 -0.33331110  0.92160986           NA
  [2,] -0.97629778  0.37953656 -1.55386992 -1.127791828
  [3,] -0.04720913 -0.58606968  0.74847725  0.609088748
  [4,]  0.61129437  0.88537322          NA -0.637236006
  [5,] -0.12842654  0.10971713 -0.52177286 -0.067578832
  [6,]  0.75896943 -0.63242417          NA  0.873436592
  [7,]  0.23827133  0.37605678          NA -0.260944278
  [8,] -0.96512529 -0.76402807 -0.33611555  0.960044948
  [9,] -0.09142860  1.41522037 -0.56131672 -0.015840755
 [10,] -1.28898534  0.82731274  0.26209545  0.028187917
 [11,]  1.08848018  1.08774018  0.44663401  2.277444058
 [12,]  0.20239149  0.49657607  0.36386048  0.003071069
 [13,] -0.30876106          NA  0.01624501           NA
 [14,]  0.45718557  0.73528992 -1.02160523  0.958628557
 [15,] -0.95542422          NA -0.77911644 -2.562178742
 [16,] -0.09625827 -1.08458374  0.31657756 -0.728423514
 [17,] -0.72860965 -0.33460039 -0.22134101 -1.554741351
 [18,]  0.13467581 -0.28493411 -1.03705698 -0.399347299
 [19,]  0.52698943  0.64204252 -0.68263663 -0.392335844
 [20,] -1.64894878 -0.84003164 -0.94553324           NA
 [21,]  0.04177614  0.61652527          NA  0.850892610
 [22,] -0.65255709  0.59212214  0.31917875  0.157072780
 [23,] -1.01898476  0.16907537 -0.31649785  0.940220646
 [24,]  0.34221281 -1.78823411          NA -0.986721444
 [25,]  1.17356245  1.34681014          NA  0.807312161
 [26,]  0.56186163  1.49987668  0.37937205  1.609628155
 [27,] -0.14419627  0.11237772 -1.08281431 -1.410903237
 [28,]  0.43471086 -0.63245863  0.72686655  1.519624992
 [29,]  1.31943059  1.40455267 -0.95041039 -0.084509771
 [30,]  0.15071306          NA  0.71314322  0.542321667
 [31,]  0.06881901  0.68371377  0.41197381  0.345768337
 [32,]          NA -0.08671733 -1.08994372 -0.195221008
 [33,] -1.16459589          NA -0.19328159  0.281006064
 [34,] -1.36450546 -1.44313563 -0.48093300 -0.717994530
 [35,] -0.44887600 -1.27143270          NA -0.013783312
 [36,] -0.74449061 -1.33607331 -3.34093724 -2.113443164
 [37,] -0.43355700 -1.13811810  0.19892824  0.204447922
 [38,] -1.32169809 -0.62177593 -1.22447931 -0.548409911
 [39,]  0.46781018 -0.77010747  0.69154779  0.375059818
 [40,]  0.65513941 -1.06695438  0.48585316  0.152154514
 [41,]  1.08381678  0.09107419  1.07343748  0.186962159
 [42,]  0.40851667  1.62078381  1.02851592  0.055539876
 [43,] -0.43297823 -1.75042359 -0.38471056 -0.464807194
 [44,] -0.34326087 -0.43023342 -0.74181118 -0.304233785
 [45,]          NA  0.28042332 -0.87439959 -0.658390653
 [46,]  0.29278737 -1.93864821 -1.95976927 -0.887221684
 [47,]          NA          NA -0.64932378 -1.443119858
 [48,]          NA  0.60531030  0.55191571 -0.107283182
 [49,]  0.03872267 -1.32126762          NA -0.475244020
 [50,]  1.10825886  0.93917666  1.02908110           NA
 [51,]  0.69410028  1.62879739  2.55159510  2.301717085
 [52,]          NA  1.50884895  1.67004555           NA
 [53,]          NA  1.86270973          NA  0.954604692
 [54,]  0.12902751 -0.48704483 -0.39441835  0.989061281
 [55,]  0.74342926  0.36045239  0.02224567  0.082466535
 [56,] -1.25118645 -1.39102069 -1.32213573  0.199272860
 [57,] -1.65483510  0.26637252  0.73320502           NA
 [58,]  1.03036194  0.55486505  0.58671952  0.181288943
 [59,] -0.92855784 -0.52050313 -1.24358883 -0.096320669
 [60,]  0.60923559  0.01224115 -0.44697800  0.145259726
 [61,]          NA  0.80678068  0.06454526  0.859236467
 [62,]  1.45748566  0.20033965  1.59803393  0.858646144
 [63,] -0.13368987          NA -2.07602146 -0.997027959
 [64,]  0.70709789 -0.50037594  0.24291981           NA
 [65,]          NA          NA -0.02776583  1.040118010
 [66,] -0.45683209  0.32238116 -0.43269009 -1.560045398
 [67,]  0.19262867  0.42792662          NA  0.263897327
 [68,] -0.51917260 -0.20828194 -0.09649893  0.515952747
 [69,]  0.76875167  0.97928099 -0.60842498  0.994259757
 [70,] -0.57401844 -0.31979753 -0.39852976           NA
 [71,]  0.44574651          NA  0.67732802  0.860872959
 [72,]  0.01382214 -3.50347866          NA  0.314178947
 [73,] -1.43331504 -1.23976839 -1.26546753           NA
 [74,]          NA  0.84048607 -0.24037903 -0.412349970
 [75,] -0.71321677 -0.40589339 -1.06146454 -0.387413826
 [76,] -1.06934530 -0.90245569  0.29049159 -0.674047650
 [77,] -1.15371028 -0.74592942  0.29974108 -0.114228645
 [78,]  2.59039103 -0.56363434 -0.15330687  1.372953562
 [79,] -1.39598026  0.05312889  0.14913805  0.255675990
 [80,]  1.47127532  0.41061791  1.32310047  1.546090232
 [81,]  1.58650954  1.73629616  1.46094935  0.123005021
 [82,] -0.34097341 -0.70810805  1.72370527  1.376248648
 [83,]  0.01856457          NA  2.03456715           NA
 [84,]  1.74623010          NA          NA -0.549465477
 [85,]  2.32607793  1.25787557  0.97900143  0.428970853
 [86,]          NA  1.43935892  1.71217005           NA
 [87,] -1.27177730  0.11399900 -1.33082494 -0.697988296
 [88,]          NA  0.99909587 -0.22604763 -0.280530267
 [89,]  0.32480806 -0.22489570 -0.64776258  0.202174211
 [90,]          NA  0.92080565 -1.45553739           NA
 [91,]  0.38858272 -0.74699128 -0.61418561           NA
 [92,] -0.15603877 -0.70586588  0.48774120 -2.101621283
 [93,]  0.24500385 -0.56013223  0.20162786 -1.498879972
 [94,]  0.89520242  0.73670128          NA -0.723480115
 [95,] -0.65756120 -1.21044766  0.44562943 -0.194352604
 [96,]  0.80358721  2.03053445  0.26257551 -0.146347153
 [97,] -0.98633734 -0.64823098 -1.83090053 -1.064402321
 [98,]  0.98505558  1.63204372  0.28637085  0.572921649
 [99,]  0.49526330 -0.47829192          NA  0.609106675
[100,]  0.93513553 -0.88636329          NA  0.375093673
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>