# 26.1.5. FERRET FACILITY#

Ferret : a practical tool for fast visualisation on datarmor

this step is dedicated to basic git usage to manage properly your source code and (potentially) interact with croco’s developers the croco’s repository is so far hosted at Inria (https://gitlab.inria.fr)

```module avail
```

Launch it by typing

```ferret
```

```yes? use data.nc
```

or

```yes? use "/home6/datawork/login/Simulation/data.nc"
```
3. Visualise the data structure

```yes? show data
```

you will get a list of all the variables contained in the fill loaded and their dimensions :

• i : designate the x dimension

• j : designate the y dimension

• k : designate the vertical dimension

• l : designate the temporal dimension

4. List the numerical values of a section of a given variable :

From now on let’s consider the variable temp which gets four dimensions (time + x,y,z).

```yes? list /i=10/j=10/k=40 temp
```

This will list all the numerical data at the level 40, i=10, j=10 of the variable temp.

5. Plot a one dimensionnal feature by fixing n-1 of the variable dimension number (n).

```yes? plot /i=10/j=10/k=40 temp
```

this will plot the time series of the variable temp.

```yes? plot /i=10/j=10/l=4 temp
```

this will plot the vertical profile of the variable temp at time l=4.

```yes? plot /i=10/j=10/l=4 temp
yes? plot /i=10/j=10/l=40/ove temp
```

the same as the previous but with superimposition of two profile at two different instants (l=10 and l=40)

6. Plot a two dimensionnal features by fixing n-2 of the variable dimension number (n).

```yes? plot /i=10/j=10 temp
```

This will plot a Hovmuller diagram (time vs z) of the variable temp.

```yes? plot /k=40/j=10 temp
```

In case, k=40 designate the surface layer, this will plot a hovemuller diagram along all longitudes vs time.

```yes? plot /k=40/j=10/lev=(10.,20.,1.) temp
```

The same as the previous one but setting a color bar that extends from 10 to 20 with bins of 1.

```yes? plot /k=40/j=10/lev=(0)(10.,20.,1.)(30) temp
```

The same as the previous one but extending the first and last color class respectively down to 0 and up to 30.