1 | % 'struct2nc': create a netcdf file from a Matlab structure |
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2 | %--------------------------------------------------------------------- |
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3 | % errormsg=struct2nc(flname,Data) |
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4 | % |
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5 | % OUPUT: |
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6 | % errormsg=error message, =[]: default, no error |
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7 | % |
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8 | % INPUT: |
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9 | % flname: name of the netcdf file to create (must end with the extension '.nc') |
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10 | % Data: structure containing all the information of the netcdf file (or netcdf object) |
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11 | % with fields: |
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12 | % (optional) .ListGlobalAttribute: list (cell array of character strings) of the names of the global attributes Att_1, Att_2... |
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13 | % .Att_1,Att_2...: values of the global attributes |
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14 | % (requested) .ListVarName: list of the variable names Var_1, Var_2....(cell array of character strings). |
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15 | % (requested) .VarDimName: list of dimension names for each element of .ListVarName (cell array of string cells) |
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16 | % (optional) .VarAttribute: cell array of structures of the form .VarAttribute{ivar}.key=value, defining an attribute key name and value for the variable #ivar |
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17 | % (requested) .Var1, .Var2....: variables (Matlab arrays) with names listed in .ListVarName |
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18 | |
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19 | %AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA |
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20 | % Copyright Joel Sommeria, 2008, LEGI / CNRS-UJF-INPG, sommeria@coriolis-legi.org. |
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21 | %AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA |
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22 | % This file is part of the toolbox UVMAT. |
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23 | % |
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24 | % UVMAT is free software; you can redistribute it and/or modify |
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25 | % it under the terms of the GNU General Public License as published by |
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26 | % the Free Software Foundation; either version 2 of the License, or |
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27 | % (at your option) any later version. |
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28 | % |
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29 | % UVMAT is distributed in the hope that it will be useful, |
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30 | % but WITHOUT ANY WARRANTY; without even the implied warranty of |
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31 | % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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32 | % GNU General Public License (file UVMAT/COPYING.txt) for more details. |
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33 | %AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA |
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34 | |
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35 | function errormsg=struct2nc(flname,Data) |
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36 | if ~ischar(flname) |
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37 | errormsg='no name input for the netcf file'; |
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38 | return |
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39 | end |
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40 | if ~exist('Data','var') |
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41 | errormsg='no data input for the netcdf file'; |
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42 | return |
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43 | end |
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44 | hhh=which('netcdf.create');% look for built-in matlab netcdf library |
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45 | |
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46 | %USE OF built-in matlab netcdf library |
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47 | if ~isequal(hhh,'') |
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48 | FilePath=fileparts(flname); |
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49 | if ~strcmp(FilePath,'') && ~exist(FilePath,'dir') |
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50 | errormsg=['directory ' FilePath ' needs to be created']; |
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51 | return |
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52 | end |
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53 | [Data,errormsg]=check_field_structure(Data)%check the validity of the input field structure |
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54 | if ~isempty(errormsg) |
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55 | errormsg=['invalid input structure:' errormsg]; |
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56 | return |
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57 | end |
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58 | ListVarName=Data.ListVarName; |
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59 | nc=netcdf.create(flname,'NC_CLOBBER');%,'clobber'); %create the netcdf file with name flname |
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60 | %write global constants |
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61 | if isfield(Data,'ListGlobalAttribute') |
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62 | keys=Data.ListGlobalAttribute; |
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63 | for iattr=1:length(keys) |
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64 | if isfield(Data,keys{iattr}) |
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65 | testvar=0; |
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66 | for ivar=1:length(ListVarName)% eliminate possible global attributes with the same name as a variable |
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67 | if isequal(ListVarName{ivar}, keys{iattr}) |
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68 | testvar=1; |
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69 | break |
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70 | end |
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71 | end |
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72 | if ~testvar |
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73 | eval(['cte=Data.' keys{iattr} ';']) |
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74 | if (ischar(cte) ||isnumeric(cte)) && ~isempty(cte)%&& ~isequal(cte,'') |
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75 | %write constant only if it is numeric or char string, and not empty |
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76 | netcdf.putAtt(nc,netcdf.getConstant('NC_GLOBAL'),keys{iattr},cte) |
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77 | end |
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78 | end |
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79 | end |
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80 | end |
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81 | end |
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82 | %create dimensions |
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83 | dimid=zeros(1,length(Data.ListDimName)); |
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84 | for idim=1:length(Data.ListDimName) |
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85 | dimid(idim) = netcdf.defDim(nc,Data.ListDimName{idim},Data.DimValue(idim)); |
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86 | end |
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87 | VarAttribute={}; %default |
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88 | testattr=0; |
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89 | if isfield(Data,'VarAttribute') |
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90 | VarAttribute=Data.VarAttribute; |
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91 | testattr=1; |
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92 | end |
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93 | varid=zeros(1,length(Data.ListVarName)); |
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94 | for ivar=1:length(ListVarName) |
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95 | varid(ivar)=netcdf.defVar(nc,ListVarName{ivar},'nc_double',dimid(Data.VarDimIndex{ivar}));%define variable |
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96 | end |
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97 | %write variable attributes |
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98 | if testattr |
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99 | for ivar=1:min(numel(VarAttribute),numel(ListVarName)) |
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100 | if isstruct(VarAttribute{ivar}) |
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101 | attr_names=fields(VarAttribute{ivar}); |
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102 | for iattr=1:length(attr_names) |
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103 | eval(['attr_val=VarAttribute{ivar}.' attr_names{iattr} ';']); |
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104 | if ~isempty(attr_names{iattr})&& ~isempty(attr_val) |
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105 | netcdf.putAtt(nc,varid(ivar),attr_names{iattr},attr_val); |
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106 | end |
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107 | end |
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108 | end |
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109 | end |
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110 | end |
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111 | netcdf.endDef(nc); %put in data mode |
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112 | for ivar=1:length(ListVarName) |
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113 | if isfield(Data,ListVarName{ivar}) |
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114 | eval(['VarVal=Data.' ListVarName{ivar} ';'])%varval=values of the current variable |
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115 | VarDimIndex=Data.VarDimIndex{ivar}; %indices of the variable dimensions in the list of dimensions |
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116 | VarDimName=Data.VarDimName{ivar}; |
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117 | if ischar(VarDimName) |
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118 | VarDimName={VarDimName}; |
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119 | end |
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120 | siz=size(VarVal); |
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121 | testrange=(numel(VarDimName)==1 && strcmp(VarDimName{1},ListVarName{ivar}) && numel(VarVal)==2);% case of a coordinate defined on a regular mesh by the first and last values. |
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122 | testline=isequal(length(siz),2) && isequal(siz(1),1)&& isequal(siz(2), Data.DimValue(VarDimIndex));%matlab vector |
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123 | testcolumn=isequal(length(siz),2) && isequal(siz(1), Data.DimValue(VarDimIndex))&& isequal(siz(2),1);%matlab column vector |
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124 | if ~testrange && ~testline && ~testcolumn && ~isequal(siz,Data.DimValue(VarDimIndex)) |
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125 | errormsg=['wrong dimensions declared for ' ListVarName{ivar} ' in struct2nc.m']; |
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126 | break |
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127 | end |
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128 | if testline || testrange |
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129 | if testrange |
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130 | VarVal=linspace(VarVal(1),VarVal(2),Data.DimValue(VarDimIndex));% restitute the whole array of coordinate values |
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131 | end |
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132 | netcdf.putVar(nc,varid(ivar), double(VarVal')); |
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133 | else |
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134 | netcdf.putVar(nc,varid(ivar), double(VarVal)); |
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135 | end |
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136 | end |
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137 | end |
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138 | netcdf.close(nc) |
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139 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
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140 | %OLD netcdf toolbox |
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141 | else |
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142 | errormsg=struct2nc_toolbox(flname,Data); |
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143 | end |
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144 | |
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