r - How to avoid extra column when writing a csv file? -

# saving work ... data_full.csv write.csv(data.full, "data_full.csv", col.names = true)  #importing file data.dir <- file.choose() data <- read.csv(data.dir, header = true) 

data.full written as

but data got read as

can suggest me solution, on how solve simple problem?

in write.csv statement use option row.names=false suppress first column - on default.