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How to create a matrix without column and row indices in R?
To create a matrix without column and row indices, we first need to create the matrix and then prmatrix function can be used to convert that matrix without column and row indices but we would need to provide the number of rows inside the function. For example, if we have a matrix M that contains 5 rows and 5 columns then it can be converted to a matrix without column and row indices using prmatrix(M,rowlab=rep("",5),collab=rep("",5)).
Example
M1<-matrix(rnorm(25),ncol=5) M1
Output
[,1] [,2] [,3] [,4] [,5] [1,] -0.3524287 0.4753824 -0.7817841 0.4452398 1.5483299 [2,] 0.7659213 0.8160877 -0.9124624 0.3859241 -0.3645244 [3,] -0.7511866 0.4664604 -2.3584599 0.2926155 0.0354159 [4,] -0.2477745 -0.7132980 -0.6503972 -0.3519619 -0.7805707 [5,] 0.5781549 -0.1417311 -0.4956891 1.1003766 0.2343090
Example
prmatrix(M1,rowlab=rep("",5),collab=rep("",5))Output
-0.3524287 0.4753824 -0.7817841 0.4452398 1.5483299 0.7659213 0.8160877 -0.9124624 0.3859241 -0.3645244 -0.7511866 0.4664604 -2.3584599 0.2926155 0.0354159 -0.2477745 -0.7132980 -0.6503972 -0.3519619 -0.7805707 0.5781549 -0.1417311 -0.4956891 1.1003766 0.2343090
Example
M2<-matrix(rpois(81,2),ncol=9) M2
Output
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [1,] 3 1 3 2 0 2 0 2 4 [2,] 3 0 1 4 0 3 2 1 2 [3,] 4 3 2 1 4 3 3 3 4 [4,] 0 2 3 3 1 2 2 3 4 [5,] 1 1 2 3 2 1 2 4 1 [6,] 2 3 0 1 1 2 4 3 2 [7,] 6 3 0 1 2 0 1 1 1 [8,] 6 3 3 2 5 1 0 0 0 [9,] 4 1 2 3 2 2 0 1 3
Example
prmatrix(M2,rowlab=rep("",9),collab=rep("",9))Output
3 1 3 2 0 2 0 2 4 3 0 1 4 0 3 2 1 2 4 3 2 1 4 3 3 3 4 0 2 3 3 1 2 2 3 4 1 1 2 3 2 1 2 4 1 2 3 0 1 1 2 4 3 2 6 3 0 1 2 0 1 1 1 6 3 3 2 5 1 0 0 0 4 1 2 3 2 2 0 1 3
Example
M3<-matrix(rexp(36,1.27),ncol=2) M3
Output
[,1] [,2] [1,] 1.90172301 0.17485982 [2,] 0.72992558 1.22893098 [3,] 0.34723400 0.03796494 [4,] 0.03941449 1.95001158 [5,] 1.04126572 1.14392629 [6,] 0.25201154 0.57012496 [7,] 1.30187720 0.96230866 [8,] 1.13920057 1.40368354 [9,] 1.41180402 0.12139199 [10,] 0.53137688 0.01768795 [11,] 0.05370309 1.69081321 [12,] 1.13580395 0.11810967 [13,] 0.56185639 1.44204980 [14,] 1.51025894 0.23696430 [15,] 1.26819806 0.07203026 [16,] 0.30501141 0.14618651 [17,] 0.93060957 0.07317170 [18,] 0.92067027 0.08642117
Example
prmatrix(M3,rowlab=rep("",18),collab=rep("",18))Output
1.90172301 0.17485982 0.72992558 1.22893098 0.34723400 0.03796494 0.03941449 1.95001158 1.04126572 1.14392629 0.25201154 0.57012496 1.30187720 0.96230866 1.13920057 1.40368354 1.41180402 0.12139199 0.53137688 0.01768795 0.05370309 1.69081321 1.13580395 0.11810967 0.56185639 1.44204980 1.51025894 0.23696430 1.26819806 0.07203026 0.30501141 0.14618651 0.93060957 0.07317170 0.92067027 0.08642117
Example
M4<-matrix(runif(40,2,5),nrow=20) M4
Output
[,1] [,2] [1,] 2.884068 2.732077 [2,] 3.694684 2.517772 [3,] 4.165912 3.924986 [4,] 3.752682 2.414989 [5,] 3.199349 4.666055 [6,] 2.365035 3.800645 [7,] 3.121915 2.395140 [8,] 2.147690 2.463121 [9,] 4.697216 4.965934 [10,] 2.094644 4.681206 [11,] 4.071888 2.360031 [12,] 3.047279 2.485864 [13,] 2.921051 4.556291 [14,] 4.655183 4.367924 [15,] 4.727901 3.647091 [16,] 4.807526 4.086226 [17,] 2.193533 2.246970 [18,] 3.198273 3.197613 [19,] 2.371362 3.260453 [20,] 4.070255 3.981377
Example
prmatrix(M4,rowlab=rep("",20),collab=rep("",20))Output
2.884068 2.732077 3.694684 2.517772 4.165912 3.924986 3.752682 2.414989 3.199349 4.666055 2.365035 3.800645 3.121915 2.395140 2.147690 2.463121 4.697216 4.965934 2.094644 4.681206 4.071888 2.360031 3.047279 2.485864 2.921051 4.556291 4.655183 4.367924 4.727901 3.647091 4.807526 4.086226 2.193533 2.246970 3.198273 3.197613 2.371362 3.260453 4.070255 3.981377
Updated on: 07-Dec-2020
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