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<div class="moz-cite-prefix">Hello,<br>
<br>
<span id="result_box" class="" lang="en"><span class="">I believe
you are applying the calc function to an object that is not a
raster</span></span>stack.<br>
For calc, you must specify a raster object like your MODIS ( or
other sensor) raster stack time series.<br>
<br>
Regards,<br>
<pre class="moz-signature" cols="72">François Messner
Technicien en géomatique
Université du Maine - GREGUM UMR ESO
Tel: 02 43 83 31 80</pre>
Le 06/03/2017 18:28, Natalia Quinteros a écrit :<br>
</div>
<blockquote
cite="mid:CAOZBhq3edXuDmTUonFWpaBD_PxjKB2cKry23=VdqmO0y1t+whw@mail.gmail.com"
type="cite">
<div dir="ltr">Hi List,
<div><br>
</div>
<div>I was doing the time series excersise of the book and I run
into a problem: </div>
<div><br>
</div>
<div>So this is my script: </div>
<div><br>
</div>
<div>
<div>f_bfm <- function(x) {x <- ts(evi, start= c(2003,
1),frequency =46)</div>
<div> bfm <- bfastmonitor(data = x, start = c(2010, 1))</div>
<div> return(cbind(bfm$breakpoint, bfm$magnitude))</div>
<div>} </div>
<div><br>
</div>
<div>rbfm <- calc(evi, fun = function(x){</div>
<div> t(apply(x,1,f_bfm))</div>
<div>})</div>
</div>
<div><br>
</div>
<div>When I run rbfm I receive this error: </div>
<div><br>
</div>
<div>
<div>Error in (function (classes, fdef, mtable) : </div>
<div> unable to find an inherited method for function ‘calc’
for signature ‘"ts", "function"’</div>
</div>
<div>
<div>
<div class="gmail_signature">
<div dir="ltr">
<div dir="ltr"><br>
</div>
<div>So, where is calc coming from? Is it coming from
the package raster? Or what is the problem here? </div>
<div><br>
</div>
<div>Thanks.</div>
<div dir="ltr"><br>
</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Natalia L Quinteros Casaverde<br>
</div>
<div dir="ltr">
<div>Ph.D Student </div>
<div>Remote Sensing and Ecosystems Lab</div>
<div>EEB - Biology</div>
<div>City University of New York & </div>
<div><span style="font-size:12.8px">Graduate Center</span><br>
</div>
<div>CUNY</div>
<div><br>
</div>
<div><br>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<br>
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<br>
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</pre>
</blockquote>
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