R Part- 3

Find the next set of R commands on DataFrame. In Last post, we saw, how to create matrix and vector, In this page we are going to work on dataframe. Before proceeding let us understand what is dataframe.
Dataframe is a structure like table with rows and columns, whereas each column contains values of one variable and each row contains one set of values from each column. I will make it simple by explaining the difference between matrix and dataframe.
Matrix has rows and columns where as it stores single datatype values,whereas dataframe stores different types of values in a single table. Example it stores numeric, character values in the single table.

Create Data Frame

TempObj1 = data.frame(ID = c(1, 2, 3, 4), NAME = c(“Abi”, “Aki”, “Ani”, “Ashi”), HeightinCM = c(100, 120, 130, 120))

Output for Data Frame Creation

Rename a variable in DataFrame

Here we rename “HeightinCM” to “HtinCM”
Before rename

names(TempObj1)[2] = “HtinCM”
After executing above command

Adding rows and columns of two data frame

TempObj2 = data.frame(COUNTRY = c(“Australia”, “Malaysia”, “UK”), LANGUAGE = c(“English”, “Malay”, “English”))
TempObj3 = data.frame(COUNTRY = c(“India”, “Italy”, “France”), LANGUAGE = c(“Hindi”, “Italian”, “French”))

Now Adding rows of above two data frame

TempObj4 = rbind(TempObj2, TempObj3)

Output of rowbind

Now Adding Colums of two data frame

TempObj4 = cbind(TempObj2, TempObj3)

Output for Column bind

Rowbind and Columnbind in single picture

Merge Operation in Data Frames

TempObj6 = data.frame(Name = c(“Abi”, “Aki”, “Ani”, “Ashi”), Age = c(40,60,50,45))
TempObj7 = data.frame(Age = c(80,40,60,70), Insurance = c(“Yes”, “No”, “Yes”, “No”))
MergedDataframe = merge(TempObj6, TempObj7, by = “Age”)

Output for Merge Operation

With this, we complete this page. See you all with next set of commands!.