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"]
Ajitesh Kumar
Ajitesh is passionate about various different technologies including programming languages such as Java/JEE, Javascript, PHP, C/C++, mobile programming languages etc, and, computing fundamentals related with cloud-native technologies, application security, cloud computing platforms, mobile apps, big data etc.
He has also authored the book, Building Web Apps with Spring 5 and Angular.
He has also authored the book, Building Web Apps with Spring 5 and Angular.
Latest posts by Ajitesh Kumar (see all)
- QA – Testing Features of Machine Learning Models - August 12, 2018
- QA of Machine Learning Models with PDCA Cycle - August 8, 2018
- QA & Data Science – How to Test Features Relevance - August 2, 2018
