Writing data to RDA and RDS files

An example showing how to write dataframes to RDA and RDS files.

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Let’s import Pandas to create dataframe and rdata to write to file.

import pandas as pd

import rdata

Let’s create a toy dataframe

data = pd.DataFrame({
    "class": pd.Categorical(["a", "b", "b"]),
    "value": [1, 2, 3],
})
data

	class	value
0	a	1
1	b	2
2	b	3

Let’s write this dataframe to an RDS file.

rdata.write_rds("data.rds", data)

By default, the file is written in a binary XDR format with gzip compression. We can write the file in different formats and compressions too.

rdata.write_rds("data_uncompressed.rds", data, compression=None)
rdata.write_rds("data_ascii.rds", data, file_format="ascii", compression=None)

We can also write multiple variables with given names to an RDA file.

df1 = pd.DataFrame({
    "class": pd.Categorical(["a", "b", "b"]),
    "value": [1, 2, 3],
})
df2 = pd.DataFrame({
    "color": ["red", "green", "blue"],
    "count": [12, 34, 56],
})
data_dict = {"df1": df1, "df2": df2}

rdata.write_rda("data.rda", data_dict)