This article represents different ways in which one could get a data frame column as a vector. Please feel free to comment/suggest if I missed to mention one or more important points. Also, sorry for the typos.
4 Techniques to Get Data Frame Column as Vector
In the examples below, diamonds dataset from ggplot2 package is considered. This is how a diamond dataset looks like:
Following are four different technique/method using which one could retrieve a data frame column as a vector.
# In the data set shown above, carat represents column name and hence, [['carat']] carat1 <- diamonds[['carat']] # In the data set shown above, carat represents 1st column and hence, index 1 carat2 <- diamonds[,1] # Pay attention to usage of dollar $ operator carat3 <- diamonds$carat # In the data set shown above, carat represents column name and hence, [, "carat"] carat4 <- diamonds[,"carat"]
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