In this article, we are going to discuss hasName() function in R Programming Language.
hasName() Function
hasName() is used to check whether the dataframe object has a certain name or not.
Syntax: hasName(dataframe,"name")
where,
dataframe is the input dataframe and name is the variable present as variable(column_name) in the given dataframe. It will return TRUE, if the name exists otherwise it will return FALSE.
Example 1:
In this example, we are creating a dataframe with 4 rows and 3 columns. Here column names are col1, col2 and col3.
# create dataframe
data=data.frame(col1=c(12,2,3,4),
col2=c(34,32,1,0),
col3=c(2,45,3,2))
# display
print(data)
# check for name col1
print(hasName(data,"col1"))
# check for name col2
print(hasName(data,"col2"))
# check for name col3
print(hasName(data,"col3"))
Output:
col1 col2 col3 1 12 34 2 2 2 32 45 3 3 1 3 4 4 0 2 [1] TRUE [1] TRUE [1] TRUE
Example 2:
In this example, we are creating a dataframe with 4 rows and 3 columns. Here column names are col1, col2 and col3.
# create dataframe
data = data.frame(col1=c(12,2,3,4),
col2=c(34,32,1,0),
col3=c(2,45,3,2))
# display
print(data)
# check for name col4
print(hasName(data,"col4"))
# check for name col6
print(hasName(data,"col6"))
Output:
col1 col2 col3 1 12 34 2 2 2 32 45 3 3 1 3 4 4 0 2 [1] FALSE [1] FALSE