How to create boxplot for matrix columns in R?

R Programming Server Side Programming Programming

To create a boxplot for data frame columns we can simply use boxplot function but it cannot be done directly for matrix columns. If we want to create boxplot for matrix columns then we need to convert the matrix into data frame and then use the boxplot function. For example, if we have a matrix called M then the boxplot for columns in M can be created by using boxplot(as.data.frame(M)).

Example

Live Demo

> M<-matrix(rnorm(150,2,0.35),ncol=5)
> M

Output

[,1] [,2] [,3] [,4] [,5]
[1,] 1.688556 1.697216 1.9469573 1.873956 2.010246
[2,] 1.655357 1.927145 2.0937415 2.273638 1.966972
[3,] 1.886917 1.182852 2.0291452 2.507944 2.338664
[4,] 2.013053 1.995526 1.8122830 2.531708 2.483359
[5,] 1.812015 1.950053 1.8902859 2.453222 2.123253
[6,] 1.781764 1.786285 2.3384120 2.275382 2.509708
[7,] 1.836378 1.192781 1.5382031 2.012324 2.290340
[8,] 2.061482 1.705481 2.5542404 1.958202 1.991252
[9,] 2.162214 1.958862 1.8096081 1.810033 1.856942
[10,] 1.897020 1.614834 2.3407207 2.199068 1.807968
[11,] 2.491147 2.317192 2.4486029 2.131722 1.947841
[12,] 1.860307 1.932982 2.2034280 1.982581 2.720482
[13,] 1.814205 2.214286 1.6917036 1.854341 2.150684
[14,] 1.224437 1.800944 1.7600398 1.503382 2.775012
[15,] 2.309462 2.534766 1.5111472 2.058761 1.823550
[16,] 2.190564 1.588298 1.8854163 1.694651 1.939035
[17,] 2.521611 2.339012 2.2959581 2.501148 1.951673
[18,] 1.808799 2.314207 1.8704730 1.937851 1.877917
[19,] 2.476626 1.806194 2.7111663 2.156506 1.521197
[20,] 1.819725 1.633549 1.9438948 2.213533 2.247944
[21,] 2.412117 1.797531 2.5320892 1.889267 2.586912
[22,] 1.679395 2.276218 1.6120445 1.648766 1.889033
[23,] 2.286285 2.221312 0.9408758 1.896072 1.996449
[24,] 2.274975 2.398884 2.0146319 1.814092 2.350100
[25,] 2.106620 1.640401 1.6416454 2.452356 1.638885
[26,] 1.556329 1.706762 1.8324196 2.348518 1.593293
[27,] 2.171867 1.707615 1.9667116 2.191344 1.595531
[28,] 1.796751 2.753674 2.1741976 1.623239 2.399018
[29,] 2.635992 2.180735 2.2114669 2.258419 2.277367
[30,] 1.874671 2.113165 2.3653358 2.231705 1.919449

Example

> boxplot(as.data.frame(M))

Output

Nizamuddin Siddiqui

Published on 04-Jan-2021 06:45:39

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