CODEWITHSUNDEEP
r
user297850
user297850

Reputation: 8015

identify unique entry list of a list

Column1A<-Dat$col1
Column1B<-Dat2$col2

Both columns, column1A and column1B consist of mixed values, such as ABC1, 234,etc. Besides, each column can have duplicate entries. For instance,

Column1A
ABC1   ABC2   1234  ABC1

Column1B
ABC2   ABC3   1234

Is there a way to get the unique entry list for each column. If the unique entry list are difference for two columns, how to find the differences?

Upvotes: 0

Views: 76

Answers (3)

Ricardo Saporta
Ricardo Saporta

Reputation: 55420

since your data is already in a data.frame or a list, no need to first copy them out. Just use apply: 

apply(Dat, 2, unique)

Upvotes: 0

Yilun Zhang
Yilun Zhang

Reputation: 9018

unique should work in getting unique values for a list.

For searching the different terms in two unique lists, you can just simply go through one of the list, and for each element of that list, check if that is in the other list.

A simple while loop should work, and you stop at the point when you cannot find an element from list 1 in list 2.

Upvotes: 1

Sven Hohenstein
Sven Hohenstein

Reputation: 81753

You can use unique to find the unique values:

unique(Column1A)

unique(Column1B)

Upvotes: 0

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