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" ))
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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" ))
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Output:
col1 col2 col3 1 12 34 2 2 2 32 45 3 3 1 3 4 4 0 2 [1] FALSE [1] FALSE