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# R write.csv() Function - Write CSV File [ R Language Examples](https://example.com/r/r-examples.html) The R write.csv() function is used to save a data frame as a CSV file. CSV format can be opened directly in tools like Excel, and is the most commonly used format for data output. The write.csv() function syntax is as follows: write.csv(x, file, row.names = TRUE, fileEncoding = "") **Parameter Description:** * **x** The data frame or matrix to write. * **file** The output file path. * **row.names** Whether to save row names, default is TRUE. It is recommended to set to FALSE to avoid extra columns. ## Example # Create processed data df<-data.frame( product =c("productA", "productB", "productC"), sales =c(120, 85, 150), price =c(9.9, 15.8, 5.6) ) # Write to CSV (without row names) write.csv(df, "temp_products.csv", row.names= FALSE) # Verify: read back and display data<-read.csv("temp_products.csv") print("Saved and read back data:") print(data) # View the raw content written lines<-readLines("temp_products.csv") print("CSV content:") print(lines) Executing the above code outputs: "Saved and read back data:" product sales price1 productA 120 9.92 productB 85 15.83 productC 150 5.6 "CSV content:" "\"product\",\"sales\",\"price\"" "\"productA\",120,9.9" "\"productB\",85,15.8" "\"productC\",150,5.6" [ R Language Examples](https://example.com/r/r-examples.html)