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Added snippet to read RDS files in an R notebook #2

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Added snippet to read RDS files in an R notebook #2

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16 changes: 16 additions & 0 deletions articles/machine-learning/how-to-r-interactive-development.md
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Expand Up @@ -143,6 +143,22 @@ You can also use a Datastore URI to access different files on a registered Datas
})
print(df)
```

Using the same filestore object, you can read an RDS file, but you need to decompress the bytes before passing it to `readRDS()` as a `rawConnection`

3. Read a serialized R object file (.RDS):
```r
funcs <- import_builtins() # Add this with the other imports, gives access to built-in Python functions such as `list()`


r_object <- with(fs$open("<path>)", "r") %as% f, {
x <- as.raw(funcs$list(f$read))
decompressed_x <- memDecompress(x, type = "gzip", asChar = "FALSE")
conn <- rawConnection(decompressed_raw)
readRDS(conn) # readRDS will decompress automatically if provided with a path, but won't decompress if provided with a rawConnection
})
print(r_object)
```

## Install R packages

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