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Python to R translation of 30 essential Pandas methods introduced by Avi Chawla in The Only 30 Methods You Should Master To Become A Pandas Pro published on TowardsDataScience.
# enable python in RMarkdown
library(reticulate)Use head() to show the top N rows.
import pandas as pd
df = pd.read_csv('data/iris.csv')
# print the top 3 rows in the dataframe
print(df.head(3)) Sepal.Length Sepal.Width Petal.Length Petal.Width Species
0 5.1 3.5 1.4 0.2 setosa
1 4.9 3.0 1.4 0.2 setosa
2 4.7 3.2 1.3 0.2 setosaWe can also sort the dataframe first then show the top N. For more on sorting a dataframe, please refer to method 13.
# to sort the dataframe first then check out the top N
df.sort_values('Sepal.Length')\
.head(5) Sepal.Length Sepal.Width Petal.Length Petal.Width Species
13 4.3 3.0 1.1 0.1 setosa
42 4.4 3.2 1.3 0.2 setosa
38 4.4 3.0 1.3 0.2 setosa
8 4.4 2.9 1.4 0.2 setosa
41 4.5 2.3 1.3 0.3 setosaTo do these tasks in R is pretty straightforward.
df <- py$df # get the dataframe from python
# print the top 3 rows in the dataframe
print(df |> head(3)) Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1 5.1 3.5 1.4 0.2 setosa
2 4.9 3.0 1.4 0.2 setosa
3 4.7 3.2 1.3 0.2 setosaTo sort first, we can use the arrange() function in the dplyr package.
library(dplyr)
# to sort the dataframe first then check out the top N
df |>
arrange(Sepal.Length) |>
head(5) Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1 4.3 3.0 1.1 0.1 setosa
2 4.4 2.9 1.4 0.2 setosa
3 4.4 3.0 1.3 0.2 setosa
4 4.4 3.2 1.3 0.2 setosa
5 4.5 2.3 1.3 0.3 setosa
sessionInfo()R version 4.2.1 (2022-06-23 ucrt)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19043)
Matrix products: default
locale:
[1] LC_COLLATE=English_Australia.utf8 LC_CTYPE=English_Australia.utf8
[3] LC_MONETARY=English_Australia.utf8 LC_NUMERIC=C
[5] LC_TIME=English_Australia.utf8
attached base packages:
[1] stats graphics grDevices datasets utils methods base
other attached packages:
[1] dplyr_1.0.10 reticulate_1.26
loaded via a namespace (and not attached):
[1] Rcpp_1.0.9 pillar_1.8.1 compiler_4.2.1 bslib_0.4.0
[5] later_1.3.0 jquerylib_0.1.4 git2r_0.30.1 workflowr_1.7.0
[9] tools_4.2.1 digest_0.6.29 lattice_0.20-45 jsonlite_1.8.2
[13] evaluate_0.17 lifecycle_1.0.3 tibble_3.1.8 png_0.1-7
[17] pkgconfig_2.0.3 rlang_1.0.6 Matrix_1.4-1 DBI_1.1.3
[21] cli_3.4.1 rstudioapi_0.14 yaml_2.3.5 xfun_0.33
[25] fastmap_1.1.0 stringr_1.4.1 knitr_1.40 generics_0.1.3
[29] fs_1.5.2 vctrs_0.4.2 sass_0.4.2 tidyselect_1.2.0
[33] grid_4.2.1 rprojroot_2.0.3 glue_1.6.2 R6_2.5.1
[37] fansi_1.0.3 rmarkdown_2.17 magrittr_2.0.3 whisker_0.4
[41] promises_1.2.0.1 htmltools_0.5.3 assertthat_0.2.1 renv_0.16.0
[45] httpuv_1.6.6 utf8_1.2.2 stringi_1.7.8 cachem_1.0.6