# Re: [ferret_users] How can I use ferret to plot a shading (or stippling) area

```Hi Ansley, Thomas and nuncio,

Thank you for your kind help. I can plot it now.

Cheers,

Liya

```
```Hi Thomas and Liya,
```
There are also "pattern" palettes for overlaying one of several patterns on a color plot. See
```http://ferret.pmel.noaa.gov/Ferret/documentation/users-guide/commands-reference/PATTERN

and
yes? go pattern_demo

```
(This capability is not available in gif mode or batch postscript mode. See the notes in the Users Guide section under Pattern.)
```
So in Thomas's example you could do
```
fill temp fill/over/palette=black/pattern=tiny_squares significance Ansley
```

Thomas Froelicher wrote:
```
```Hi Liya,

please find below the commands to plot a stippling area which is
statistical significant for two fields

----------
! Define mask (1) for significance
let significance = if ... gt 0.95 then 1 else 0

let lon = x[gx=temp] + 0*y[gy=temp]
let lat = 0*x[gx=temp] + y[gy=temp]

```
fill temp plot/nolab/vs/over/sym=dot/color=black significant*lon, significant*lat
```-----------

Cheers,

thomas

Liya Jin wrote:
```
```Dear Ferreters,

1) How can I use ferret to plot a shading (or stippling) area which is
statistical significant difference (e.g. 95% significant level using a
student's-test) for two fields (e.g. temperature or precipitation)
that overlay the 2D figure?

2) How can I set the palette to get an inverse colorscale with high
and low values reversed?

Thanks!

```
Liya
```

```
```

```