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# Loading a TCPD dataset into R
The file ``load_dataset.R`` contains the function ``load.dataset`` that reads
the JSON file into an R dataframe. The
[RJSONIO](https://cran.r-project.org/web/packages/RJSONIO/index.html) package
is required:
```R
> install.packages('RJSONIO')
```
Simply run:
```R
> source('./load_dataset.R')
> df <- load.dataset('../../datasets/ozone/ozone.json')
> df
t Total Emissions
1 0 380000
2 1 400000
3 2 440000
4 3 480000
5 4 510000
6 5 540000
7 6 580000
8 7 630000
```
Notice that the time axis in TCPD is always 0-based. This needs to be taken
into account when comparing detection results to the human annotations. (This
is an unfortunate consequence of the differences between indexing in R and
Python.)
Missing observations in time series are represented with a ``NA`` value.
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