Reading files in parallel
The Data Analyst on your team has a long list of files that contains birth data from the USA. She has written the following loop to read them all into her workspace:
df_all <- NULL
for (file in file_list) {
df <- read.csv(file)
df_all <- rbind(df_all, df)
}
The only problem is that this is taking too long. You, as the resident R expert, want to help. The parallel and profvis packages have been loaded for you.
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Parallel Programming in R
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Versuche dich an dieser Übung, indem du diesen Beispielcode vervollständigst.
# Wrap this code in a profvis call
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df_all <- NULL
for (file in file_list) {
df <- read.csv(file)
df_all <- rbind(df_all, df)
}
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