# Basic statistics

## Mean, Standard deviation, Range
To compute the basic statistics over a dataset, use the [metocean](../../data-model-processing/metocean.md) command:

```bash
#reduce the dataset to the wanted grid (here only the surface velocity)
rep=/ecola/share/tmp/training/GLORYS
ncks -d depth,0,0 -v uo,vo,longitude,latitude \
     $rep/dataset-ibi-reanalysis-phys-005-002-daily_apr-jun2014.nc \
     GLORYS-surf_velocity-apr-jun-2014.nc

metocean GLORYS-surf_velocity-apr-jun-2014.nc -v uo vo -s 2014/04/01 -f 2014/05/01
```
The results will be stored in the file "uo-stats.nc". Each variable analysed will have it the followinf set of statistic variables:
- VARNAME_mean
- VARNAME_stddev
- VARNAME_min
- VARNAME_max