I'm trying to read a CSV file in spark using spark df. The file doesn't have a header column but I want to have the header column. How to do that?
I don't know if I'm correct or not, I wrote this command
-> **val df = spark.read.format("csv").load("/path/genchan1.txt").show()**

and got the column name as \_c0 and \_c1 for columns. Then I tried to change the column name to the desired names using: **val df1 = df.withColumnRenamed("\_c0","Series")** , But I'm getting "withColumnRenamed" is not a member on unit.

PS: I have imported spark.implicits.\_ and spark.sql.functions already.

Please help me know is there any way to add a column header to dataset and why I'm getting this issue.