In richelbilderbeek/ribir: ribir, basic phylogenetics page

Here I tested how to do correct file I/O by writing a data frame with column and row names to a .csv and then loading a data frame from that .csv again. The content, row names and column names should be present in the loaded data frame

csv_filename <- "analyse_files_test.csv"
df_in <- data.frame(
  x = c(1, 2, 3), y = c(1, 4, 9)
)
rownames(df_in) <- c("a.txt", "b.txt", "c.txt")
print(rownames(df_in))
knitr::kable(head(df_in))

The table should show column and row names in bold.

Saving:

write.csv(x = df_in, file = csv_filename, row.names = TRUE)

Loading:

df_out <- read.csv(file = csv_filename,
  header = TRUE,
  stringsAsFactors = FALSE,
  row.names = 1
)
knitr::kable(head(df_out))

No idea why row.names = 1 works, and row.names = TRUE not...

richelbilderbeek/ribir documentation built on March 19, 2021, 3:55 a.m.