read.csv

• Usage
• Example

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Usage

Used to write data from a dataframe to a CSV file.

Usage:

write.csv(dataframe, "filename.csv", row.names=FALSE)

• The first input is the name of the dataframe you want to save as a CSV file
• The second input is the filename you want to save the data to
• For this class, we’ll always include row.names=FALSE as the third input. This avoids writing an extraneous column to the CSV file.

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Example

rm(list=ls())

df_1 <- read.csv("IPUMS_ACS2019_CA_1.csv")
df_2 <- read.csv("IPUMS_ACS2019_CA_2.csv")

merged_df <- inner_join(df_1, df_2, by=c("YEAR","SERIAL","PERNUM"))

write.csv(merged_df, "IPUMS_ACS2019_CA_ALL.csv", row.names=FALSE)