Creating a matrix of hash values, with zeros and ones

Asked Jun 29 '17 at 02:02

Active Jun 29 '17 at 02:24

Viewed 57 times

Have a data-set that looks like this, but with 250000 rows:

a
a
b
c
c
c
c
etc.

I would like to make a matrix with zero and one values for each row, whether they appear in the columns, which are a,b,c etc.

Any help is greatly appreciated!

Thanks!

edited Jun 29 '17 at 02:24

MrFlick

asked Jun 29 '17 at 02:02

deadasdreams

Oh, this needs to be done in R, thanks! – deadasdreams Jun 29 '17 at 02:03
Possible duplicate: https://stackoverflow.com/questions/3384506/create-new-dummy-variable-columns-from-categorical-variable – MrFlick Jun 29 '17 at 02:25
Possible duplicate: https://stackoverflow.com/questions/5048638/automatically-expanding-an-r-factor-into-a-collection-of-1-0-indicator-variables – MrFlick Jun 29 '17 at 02:26
Possible duplicate: https://stackoverflow.com/questions/30622422/create-mutually-exclusive-dummy-variables-from-categorical-variable-in-r – MrFlick Jun 29 '17 at 02:26
take a look at `?nnet::class.ind` – Kota Mori Jun 29 '17 at 02:37

0 Answers0