Hi Henri,
If you're working with angles, or any data with a modulo applied to it, you
should really "unmodulo" it before using the data. This will make most
computations a lot easier, including finding the MAD on buckets. At the end
of the script, you can just reapply the mod if you need to.
Here is a utility macro I use to "unmodulo" a GTS or a list thereof:
<%
SAVE 'context' STORE
[ 'gts' 'modulo' ] STORE
0 'add_val' STORE
[
$gts
<%
'mw' STORE
$mw 0 GET // Tick
$mw 4 GET -1 GET // Lat
$mw 5 GET -1 GET // Lon
$mw 6 GET -1 GET // Elev
$mw 7 GET -1 GET
$mw 7 GET 0 GET - 'diff' STORE
$diff ABS $modulo 2.0 / >
<%
$diff 0 <
<% $add_val $modulo + 'add_val' STORE %>
<% $add_val $modulo - 'add_val' STORE %>
IFTE
%>
IFT
$mw 7 GET -1 GET $add_val + // Value
%>
1 SNAPSHOTN EVAL
{ 'modulo' $modulo } DEREF
MACROMAPPER
1 0 0
]
MAP
$gts TYPEOF 'LIST' !=
<% 0 GET %>
IFT
$context RESTORE
%>
You can use it this way:
$gtsOrlgts 360 @util/unmod
Regards,
Fabien.
On Friday, February 14, 2020 at 9:19:26 AM UTC+1, henri laurent wrote:
>
> Hi,
> I am looking for a method to measure the variability of a set of angles.
> For non circular data, we have bucketizer.mad.
> Could we have a bucketizer.mad.circular function the same way we have
> buckerizer.mean
> and buckerizer.mean.circular?
>
> Thanks,
>
> Henri
>
>
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