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Hi Leila,<br>
<br>
Here is a workaround. You can aggregate your raster first <br>
<br>
<i>or <- raster('file') </i># original<br>
<i>ar <- aggregate(or, fact=2, fun='your function')</i> #
aggregated raster<br>
<br>
And then use the extract function. xyFromCell() gives you the
coordinates for each pixel in your original raster and you can use
them to query your aggregated raster. Then you just build a new
raster using the original one as a reference.<br>
<br>
<i>nr <- setValues(or, extract(ar, xyFromCell(or)))</i> # new
raster<br>
<br>
<br>
<div class="moz-cite-prefix">On 21-07-2017 11:55, Leila Schuh wrote:<br>
</div>
<blockquote type="cite"
cite="mid:119225694.2306012.1500630913248@mail.yahoo.com">
<div style="color:#000; background-color:#fff;
font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande,
sans-serif;font-size:13px">
<div id="yui_3_16_0_ym19_1_1500662648076_12265"><span
id="yui_3_16_0_ym19_1_1500662648076_12266" lang="EN-US">Dear
all,</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12267"><span
id="yui_3_16_0_ym19_1_1500662648076_12268" lang="EN-US"><br
id="yui_3_16_0_ym19_1_1500662648076_12269">
</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12270"><span
id="yui_3_16_0_ym19_1_1500662648076_12271" lang="EN-US">I am
trying to run analyses on raster
data and am stuck with a specific problem.</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12272"><span
id="yui_3_16_0_ym19_1_1500662648076_12273" lang="EN-US"><br
id="yui_3_16_0_ym19_1_1500662648076_12274">
</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12275"><span
id="yui_3_16_0_ym19_1_1500662648076_12276" lang="EN-US">I
would like to create a moving window,
which doesn’t assign individual values to all pixels
included in the window,
but one value for all pixels (within the window).
Consequently, I would like to
“paste the windows next to each other” rather than running
calculations for
every individual pixel.</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12277"><span
id="yui_3_16_0_ym19_1_1500662648076_12278" lang="EN-US"><br
id="yui_3_16_0_ym19_1_1500662648076_12279">
</span></div>
<div dir="ltr" id="yui_3_16_0_ym19_1_1500662648076_12280"><span
id="yui_3_16_0_ym19_1_1500662648076_12281" lang="EN-US">I
haven’t figured out how to do this with
focal or focalWeight. (I also tried to use aggregate instead
of a moving window, but it doesn't allow me to use
self-defined functions.) <br
id="yui_3_16_0_ym19_1_1500662648076_12282">
</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12283"><span
id="yui_3_16_0_ym19_1_1500662648076_12284" lang="EN-US"><br
id="yui_3_16_0_ym19_1_1500662648076_12285">
</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12286"><span
id="yui_3_16_0_ym19_1_1500662648076_12287" lang="EN-US">If
anyone could help me out with this, that
would awesome!</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12288"><span
id="yui_3_16_0_ym19_1_1500662648076_12289" lang="EN-US"><br
id="yui_3_16_0_ym19_1_1500662648076_12290">
</span></div>
<div dir="ltr" id="yui_3_16_0_ym19_1_1500662648076_12291"><span
id="yui_3_16_0_ym19_1_1500662648076_12292" lang="EN-US">I'll
send a tiny bit of code and the raster file I'm working
with.<br id="yui_3_16_0_ym19_1_1500662648076_12293">
</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12294"><span
id="yui_3_16_0_ym19_1_1500662648076_12295" lang="EN-US"><br
id="yui_3_16_0_ym19_1_1500662648076_12296">
</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12297"><span
id="yui_3_16_0_ym19_1_1500662648076_12298" lang="EN-US">Thank
you and best wishes,</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12299"><span
id="yui_3_16_0_ym19_1_1500662648076_12300" lang="EN-US">Leila</span></div>
<div id="yui_3_16_0_ym19_1_1500662648076_12301">
<div dir="ltr" id="yui_3_16_0_ym19_1_1500662648076_12304"><span
id="yui_3_16_0_ym19_1_1500662648076_12302" lang="EN-US"><br
id="yui_3_16_0_ym19_1_1500662648076_12303">
</span></div>
</div>
</div>
<br>
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<br>
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</blockquote>
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