Convert Rdd to Data Frame - i am getting output in the data frame table with " " like "2012-10-10" but i should get output without " " in the table : My input file contains below input

"date","time","size","r_version","r_arch","r_os"  
"2012-10-01","00:30:13",35165,"2.15.1","i686","linux-gnu"  
"2012-10-01","00:30:15",212967,"2.15.1","i686","linux-gnu"  
"2012-10-01","02:30:16",167199,"2.15.1","x86_64","linux-gnu"

my present output is like 

[present output][1]

my required output is

[required output][3]


  [1]: https://i.stack.imgur.com/DMfXP.png
  [2]: https://i.stack.imgur.com/jBzXl.png
  [3]: https://i.stack.imgur.com/vVJpU.png