<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000'>You can use MPI_Op_create to create the appropriate operation (see here: http://www.mcs.anl.gov/research/projects/mpi/www/www3/MPI_Op_create.html ) then use it in MPI_Reduce (instead of MPI_MIN).<div><br><div><span name="x"></span><font size="2"><font size="3">Matthieu Dorier<br>
</font>PhD student at ENS Rennes<br><a href="http://people.irisa.fr/Matthieu.Dorier">http://people.irisa.fr/Matthieu.Dorier</a></font><span name="x"></span><br></div><hr id="zwchr"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>De: </b>"Wesley B. Bland" <wbland@anl.gov><br><b>À: </b>discuss@mpich.org<br><b>Envoyé: </b>Dimanche 16 Février 2014 06:43:25<br><b>Objet: </b>Re: [mpich-discuss] Can i use MPI_REDUCE(with MPI_MIN) to get a "min array"?<br><br>
It depends on how you define min array. Do you want to get the minimum value at each index? The full array with the minimum sum? Something else?
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<div>On Feb 15, 2014, at 6:22 AM, 维洛逐风 <<a href="mailto:wu_0317@qq.com" target="_blank">wu_0317@qq.com</a>> wrote:</div>
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<div>HI.</div>
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<div>Say,I have 10 process，each one has a array called gbest, I want to get the min array(with a compare operation I want to define).</div>
<div>Is there a way to use MPI_REDUCE to do this?As I know, MPI_MIN specifies datatypes(without arrays).</div>
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<div style="font-size: 14px; font-family: Verdana;">Jie-Jun Wu<br>
Department of Computer Science,<br>
Sun Yat-sen University,<br>
Guangzhou,<span class="Apple-converted-space"> </span><br>
P.R. China<br>
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