Obtaining a single value from a table in R

Question

I have a dataframe: trainData. Running table(trainData$Survived) I obtain the following table.

  No  Yes 
1062  490

How can I obtain just the integer value relative to the No column? Running this:

pNo = table(trainData$Survived)['No']

I still obtain a table in pNo:

  No 
1062

While I would like to have only 1062! How to do that?

Try `unname(table(trainData$Survived)['No'])` or `table(trainData$Survived)[['No']]` — markus, Jun 05 '19 at 10:14
Thanks @markus ! That solved my problem: if you make ti an answer to my question I will mark it as the correct one :) — Robb1, Jun 05 '19 at 10:16

score 2 · Accepted Answer · answered Jun 05 '19 at 10:28

2

Use [[:

Example:

table(iris$Species)[["setosa"]]
# [1] 50

answered Jun 05 '19 at 10:28

s_baldur

score 0 · Answer 2 · answered Jun 05 '19 at 10:26

0

You got a named vector. If you don't want the name 'No', try the as.numeric() method to convert it:

pNo <- as.numeric(table(trainData$Survived)['No'])
pNo

answered Jun 05 '19 at 10:26

Alan

A small technical note: table() output is not a vector but an array in this case one dimensional. See for example: `dim(table(iris$Species))`, vectors don't have a dim attritbute. – s_baldur Jun 05 '19 at 10:31

2 Answers2