How do I extract values from a table by name?

Asked Apr 20 '17 at 12:36

Active Apr 20 '17 at 13:12

Viewed 59 times

When I use the table method, I get a count of how many of each element appears. e.g.

tab = table(data.frame(c('a','a','b','c')))

Gives me the value:

a b c 
2 1 1

I don't understand what this data structure is though or how to use it. If I want to grab a value from it, I can use tab['a'], but this gives:

a 
2

When I check the type of tab['a'], it just tells me it's an integer. Why does it have the a attached to it? How do I get just the value (2)?

edited Apr 20 '17 at 13:12

Konrad Rudolph

asked Apr 20 '17 at 12:36

Kewl

1

Try `class(tab); str(tab)` also see [this post](http://stackoverflow.com/questions/10758961/how-to-convert-a-table-to-a-data-frame) – zx8754 Apr 20 '17 at 12:40
1

`unname(tab['a'])` to get only the value. – jogo Apr 20 '17 at 12:41
2

or try tab[['a']] – G5W Apr 20 '17 at 12:50

0 Answers0