Читать книгу The Big R-Book - Philippe J. S. De Brouwer - Страница 175

It is also possible to write data back into a file. Best is to use a structured format such as a CSV-file.

subset()

write.csv(d2, “output.csv”, row.names = FALSE) new.d2 <- read.csv(“output.csv”) print(new.d2) ## d1.Date d1.CAD ## 1 2008-12-30 1.7331 ## 2 2008-12-29 1.7408 ## 3 2008-12-18 1.7433 ## 4 1999-02-03 1.7151 ## 5 1999-01-29 1.7260 ## 6 1999-01-28 1.7374 ## 7 1999-01-27 1.7526 ## 8 1999-01-26 1.7609 ## 9 1999-01-25 1.7620 ## 10 1999-01-22 1.7515 ## 11 1999-01-21 1.7529 ## 12 1999-01-20 1.7626 ## 13 1999-01-19 1.7739 ## 14 1999-01-18 1.7717 ## 15 1999-01-15 1.7797 ## 16 1999-01-14 1.7707 ## 17 1999-01-13 1.8123 ## 18 1999-01-12 1.7392 ## 19 1999-01-11 1.7463 ## 20 1999-01-08 1.7643 ## 21 1999-01-07 1.7602 ## 22 1999-01-06 1.7711 ## 23 1999-01-05 1.7965 ## 24 1999-01-04 1.8004

Figure 4.6: The histogram of the most recent values of the CAD only.