title: R - column names in read.table and write.table starting with number and containing space
body: <p>I am importing a csv of stock data into R, with column names of stock ticker which starts with number and containing space inside, e.g. "5560 JP". After reading into R, the column names are added with "X" and space replaced by ".", e.g. "X5560.JP". After all the works are done in R, I want to write the processed data back to a new csv, but with the original column name, e.g. "5560 JP" instead of "X5560.JP", how can I do that?</p>
  
  <p>Thank you!</p>