1 | function [var_rho]=u2rho_2d(var_u) |
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2 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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3 | % |
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4 | % transfert a field at u points to a field at rho points |
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5 | % |
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6 | % Further Information: |
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7 | % http://www.brest.ird.fr/Roms_tools/ |
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8 | % |
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9 | % This file is part of ROMSTOOLS |
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10 | % |
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11 | % ROMSTOOLS is free software; you can redistribute it and/or modify |
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12 | % it under the terms of the GNU General Public License as published |
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13 | % by the Free Software Foundation; either version 2 of the License, |
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14 | % or (at your option) any later version. |
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15 | % |
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16 | % ROMSTOOLS is distributed in the hope that it will be useful, but |
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17 | % WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 | % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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19 | % GNU General Public License for more details. |
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20 | % |
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21 | % You should have received a copy of the GNU General Public License |
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22 | % along with this program; if not, write to the Free Software |
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23 | % Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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24 | % MA 02111-1307 USA |
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25 | % |
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26 | % Copyright (c) 2001-2006 by Pierrick Penven |
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27 | % e-mail:Pierrick.Penven@ird.fr |
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28 | % |
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29 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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30 | |
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31 | [Mp,L]=size(var_u); |
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32 | Lp=L+1; |
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33 | Lm=L-1; |
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34 | var_rho=zeros(Mp,Lp); |
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35 | var_rho(:,2:L)=0.5*(var_u(:,1:Lm)+var_u(:,2:L)); |
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36 | var_rho(:,1)=var_rho(:,2); |
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37 | var_rho(:,Lp)=var_rho(:,L); |
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38 | |
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39 | return |
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40 | |
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