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<p>I concur with Wayne, Chavoux and Damian. You can thin down the
entire dataset to get a consistent ~2 pts per day, and analyze
that subset for its spatial characteristics only (i.e.,
isopleths). In other words, ignore time when you construct hulls
for this subset because the duration between observations is not
meaningful (has less to do with the individual's behavior and more
to do with noise from the sampling logistics). Then when you
analyze the portion of the data that has a regular sampling
frequency, you can include time when constructing hulls, compute
hull metrics that assume enclosed points are near in space and
time, construct metrics for revisitation, etc. Cheers, Andy<br>
</p>
<div class="moz-cite-prefix">On 11/26/2020 9:12 AM, Wayne Marcus
GETZ wrote:<br>
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cite="mid:3589DCD4-16C8-413F-9414-4CC2492CAFAC@berkeley.edu">
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Just to be clear. You can analyze the full period using a subset
of the higher frequency data added to the full set of the lower
frequency data. You can also analyze the higher frequency period
on its own. So the two periods overlap and the full contains the
partial.<br class="">
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<blockquote type="cite" class="">
<div class="">On Nov 26, 2020, at 8:56 AM, Chavoux Luyt <<a
href="mailto:chavoux@gmail.com" class=""
moz-do-not-send="true">chavoux@gmail.com</a>> wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div dir="ltr" class="">
<div class="">Hi Cassandra,</div>
<div class=""><br class="">
</div>
<div class="">I agree with the answer by Damian Lidgard.
As I understand it, you define a "visit" period (in
order to see whether 2 points in the same area is part
of a single visit or a revisit). Typically, for
predators I used the longest period they would stay on a
single carcass. So if your sample frequency is longer
apart than the "visit period", there is no way to
classify it as anything else than a revisit. I would
analyse the 2 periods separately.</div>
<div class=""><br class="">
</div>
HTH.
<div class="">Chavoux Luyt</div>
<div class=""><br class="">
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Op Do. 26 Nov. 2020
om 07:10 het Cassandra Arkinstall <<a
href="mailto:cassandra.arkinstall@gmail.com"
target="_blank" class="" moz-do-not-send="true">cassandra.arkinstall@gmail.com</a>>
geskryf:<br class="">
</div>
<blockquote class="gmail_quote" style="margin:0px 0px
0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div dir="ltr" class="">
<div style="margin: 0cm 0cm 0.0001pt; font-size:
11pt; font-family: Calibri, sans-serif;"
class=""><span style="font-size:11pt" class="">Hi
all, </span></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size:
11pt; font-family: Calibri, sans-serif;"
class=""><span style="font-size:11pt" class=""><br
class="">
</span></div>
<div style="margin: 0cm 0cm 0.0001pt; font-size:
11pt; font-family: Calibri, sans-serif;"
class=""><span style="font-size:11pt" class="">I
am new to tLoCoH and have a question about the
sampling frequency graphs. I have GPS tracking
data for bilbies however there are some gaps
and missing data for the first part of my
study (due to antenna breakages). This means
I </span><span style="font-size:11pt" class="">only
have
1-2 fixes per day for the first month, and
then several fixes per day for the
following month (as the antennas were
repaired).</span></div>
<p class="MsoNormal" style="margin:0cm 0cm
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"> </p>
<div style="margin: 0cm 0cm 0.0001pt; font-size:
11pt; font-family: Calibri, sans-serif;"
class="">This then affects my sampling frequency
graphs (example
attached), and I am concerned that the points at
a low sampling frequency will
affect the temporal analyses. Should I consider
trimming these data points
using “lxy.thin.byfreq()”? Or is it best to keep
them in?</div>
<div style="margin: 0cm 0cm 0.0001pt; font-size:
11pt; font-family: Calibri, sans-serif;"
class=""><br class="">
</div>
<div style="margin: 0cm 0cm 0.0001pt; font-size:
11pt; font-family: Calibri, sans-serif;"
class="">Thanks in advance. </div>
<p class="MsoNormal" style="margin:0cm 0cm
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span
style="font-size:11pt" class=""> </span></p>
<div style="margin: 0cm 0cm 0.0001pt; font-size:
11pt; font-family: Calibri, sans-serif;"
class="">Kind regards, </div>
<div style="margin: 0cm 0cm 0.0001pt; font-size:
11pt; font-family: Calibri, sans-serif;"
class="">Cass </div>
</div>
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