/usr/share/octave/packages/netcdf-1.0.11/nccreate.m is in octave-netcdf 1.0.11-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | ## Copyright (C) 2013 Alexander Barth
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; If not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {} nccreate(@var{filename},@var{varname})
## @deftypefnx {Function File} {} nccreate(@var{filename},@var{varname},"property",@var{value},...)
##
## Create the variable @var{varname} in the file @var{filename}.
##
## The following properties can be used:
## @itemize
## @item "Dimensions": a cell array with the dimension names followed by their
## length or Inf if the dimension is unlimited. If the property is ommited, a
## scalar variable is created.
## @item "Datatype": a string with the Octave data type name
## (see @code{ncinfo} for the correspondence between Octave and NetCDF data
## types). The default data type is a "double".
## @item "Format": This can be "netcdf4_classic" (default), "classic", "64bit"
## or "netcdf4".
## @item "FillValue": the value used for undefined elements of the NetCDF
## variable.
## @item "ChunkSize": the size of the data chunks. If omited, the variable is
## not chunked.
## @item "DeflateLevel": The deflate level for compression. It can be the string
## "disable" (default) for no compression or an integer between 0 (no
## compression) and 9 (maximum compression).
## @item "Shuffle": true for enabling the shuffle filter or false (default) for
## disabling it.
## @end itemize
##
## Example:
## @example
## nccreate("test.nc","temp","Dimensions",@{"lon",10,"lat",20@},"Format","classic");
## ncdisp("test.nc");
## @end example
## @seealso{ncwrite}
## @end deftypefn
function nccreate(filename,varname,varargin)
dimensions = {};
datatype = 'double';
ncformat = 'netcdf4_classic';
FillValue = [];
ChunkSize = [];
DeflateLevel = 'disable';
Shuffle = false;
for i = 1:2:length(varargin)
if strcmp(varargin{i},'Dimensions')
dimensions = varargin{i+1};
elseif strcmp(varargin{i},'Datatype')
datatype = varargin{i+1};
elseif strcmp(varargin{i},'Format')
ncformat = varargin{i+1};
elseif strcmp(varargin{i},'FillValue')
FillValue = varargin{i+1};
elseif strcmp(varargin{i},'ChunkSize')
ChunkSize = varargin{i+1};
elseif strcmp(varargin{i},'DeflateLevel')
DeflateLevel = varargin{i+1};
elseif strcmp(varargin{i},'Shuffle')
Shuffle = varargin{i+1};
else
error(['unknown keyword ' varargin{i} '.']);
end
end
if ~isempty(stat(filename))
ncid = netcdf_open(filename,'NC_WRITE');
netcdf_reDef(ncid);
else
mode = format2mode(ncformat);
ncid = netcdf_create(filename,mode);
end
% create dimensions
dimids = [];
i = 1;
while i <= length(dimensions)
if i == length(dimensions)
dimids(end+1) = netcdf_inqDimID(ncid,dimensions{i});
i = i+1;
elseif ischar(dimensions{i+1})
dimids(end+1) = netcdf_inqDimID(ncid,dimensions{i});
i = i+1;
else
try
if isinf(dimensions{i+1})
dimensions{i+1} = netcdf_getConstant('NC_UNLIMITED');
end
dimids(end+1) = netcdf_defDim(ncid,dimensions{i},dimensions{i+1});
catch
dimids(end+1) = netcdf_inqDimID(ncid,dimensions{i});
end
i = i+2;
end
end
varid = netcdf_defVar(ncid,varname,oct2nctype(datatype),dimids);
if ~isempty(ChunkSize)
netcdf_defVarChunking(ncid,varid,'chunked',ChunkSize);
end
if ~isempty(FillValue)
% value of nofill?
netcdf_defVarFill(ncid,varid,false,FillValue);
end
if isnumeric(DeflateLevel)
netcdf_defVarDeflate(ncid,varid,Shuffle,true,DeflateLevel);
end
netcdf_close(ncid);
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