Hi andresrcs,
Thanks for the reply. But I get the error whether I use rbind or map_dfr. The values below the column head gets affixed with 
My csv files contain different number of rows & columns, and some rows are just text.
Warning messages:
1: In bind_rows_(x, .id) : Unequal factor levels: coercing to character
2: In bind_rows_(x, .id) :
binding character and factor vector, coercing into character vector
3: In bind_rows_(x, .id) :
binding character and factor vector, coercing into character vector
I read that rbindlist can solve the above issue of factors with unequal levels and character cols automatically. But I can't install the package data.table