source: trunk/src/read_civdata.m @ 576

Last change on this file since 576 was 576, checked in by sommeria, 8 years ago

grid improved for civ: computation done closer to the edge. set_grid improved.

File size: 9.1 KB
Line 
1%'read_civdata': reads new civ data from netcdf files
2%------------------------------------------------------------------
3%
4% function [Field,VelTypeOut]=read_civxdata(filename,FieldNames,VelType)
5%
6% OUTPUT:
7% Field: structure representing the selected field, containing
8%            .Txt: (char string) error message if any
9%            .ListGlobalAttribute: list of global attributes containing:
10%                    .NbCoord: number of vector components
11%                    .NbDim: number of dimensions (=2 or 3)
12%                    .Dt: time interval for the corresponding image pair
13%                    .Time: absolute time (average of the initial image pair)
14%                    .CivStage: =0,
15%                       =1, civ1 has been performed only
16%                       =2, fix1 has been performed
17%                       =3, pacth1 has been performed
18%                       =4, civ2 has been performed
19%                       =5, fix2 has been performed
20%                       =6, pacth2 has been performed
21%                     .CoordUnit: 'pixel'
22%             .ListVarName: {'X'  'Y'  'U'  'V'  'F'  'FF'}
23%                   .X, .Y, .Z: set of vector coordinates
24%                    .U,.V,.W: corresponding set of vector components
25%                    .F: warning flags
26%                    .FF: error flag, =0 for good vectors
27%                     .C: scalar associated with velocity (used for vector colors)
28%                    .DijU; matrix of spatial derivatives (DijU(1,1,:)=DUDX,
29%                        DijU(1,2,:)=DUDY, Dij(2,1,:)=DVDX, DijU(2,2,:)=DVDY
30%
31% VelTypeOut: velocity type corresponding to the selected field: ='civ1','interp1','interp2','civ2'....
32%
33% INPUT:
34% filename: file name (string).
35% FieldNames =cell of field names to get, which can contain the strings:
36%             'ima_cor': image correlation, vec_c or vec2_C
37%             'vort','div','strain': requires velocity derivatives DUDX...
38%             'error': error estimate (vec_E or vec2_E)
39%             
40% VelType : character string indicating the types of velocity fields to read ('civ1','civ2'...)
41%            if vel_type=[] or'*', a  priority choice, given by vel_type_out{1,2}, is done depending
42%            if vel_type='filter'; a structured field is sought (filter2 in priority, then filter1)
43
44
45% FUNCTIONS called:
46% 'varcivx_generator':, sets the names of vaiables to read in the netcdf file
47% 'nc2struct': reads a netcdf file
48
49function [Field,VelTypeOut,errormsg]=read_civdata(filename,FieldNames,VelType)
50
51%% default input
52if ~exist('VelType','var')
53    VelType='';
54end
55if isequal(VelType,'*')
56    VelType='';
57end
58if isempty(VelType)
59    VelType='';
60end
61if ~exist('FieldNames','var')
62    FieldNames=[]; %default
63end
64errormsg='';
65if ischar(FieldNames), FieldNames={FieldNames}; end;
66FieldRequest='';
67for ilist=1:length(FieldNames)
68    if ~isempty(FieldNames{ilist})
69        switch FieldNames{ilist}
70            case{'U','V','norm(U,V)'}
71                FieldRequest='interp_lin';
72            case {'curl(U,V)','div(U,V)','strain(U,V)'}
73                FieldRequest='interp_tps';
74        end
75    end
76end
77
78%% reading data
79Data=nc2struct(filename,'ListGlobalAttribute','CivStage');
80[varlist,role,VelTypeOut]=varcivx_generator(FieldRequest,VelType,Data.CivStage);
81if isempty(varlist)
82    erromsg=['error in read_civdata: unknow velocity type ' VelType];
83    return
84else
85    [Field,vardetect]=nc2struct(filename,varlist);%read the variables in the netcdf file
86end
87if isfield(Field,'Txt')
88    errormsg=Field.Txt;
89    return
90end
91if vardetect(1)==0
92     errormsg=[ 'requested field not available in ' filename '/' VelType ': need to run patch'];
93     return
94end
95switch VelTypeOut
96    case{'civ1','filter1'}
97        if isfield(Field,'Patch1_SubDomain')
98            Field.SubDomain=Field.Patch1_SubDomain;
99            Field.ListGlobalAttribute=[Field.ListGlobalAttribute {'SubDomain'}];
100        end     
101        Field.Dt=Field.Civ1_Dt;
102        Field.Time=Field.Civ1_Time;
103    case{'civ2','filter2'}
104        if isfield(Field,'Patch2_SubDomain')
105            Field.SubDomain=Field.Patch2_SubDomain;
106            Field.ListGlobalAttribute=[Field.ListGlobalAttribute {'SubDomain'}];
107        end
108        Field.Dt=Field.Civ2_Dt;
109        Field.Time=Field.Civ2_Time;
110end
111Field.ListGlobalAttribute=[Field.ListGlobalAttribute {'Dt','Time'}];
112ivar_U_tps=[];
113var_ind=find(vardetect);
114for ivar=1:numel(var_ind)
115    Field.VarAttribute{ivar}.Role=role{var_ind(ivar)};
116    Field.VarAttribute{ivar}.FieldRequest=FieldRequest;
117    if strcmp(role{var_ind(ivar)},'vector_x')
118        Field.VarAttribute{ivar}.FieldName=FieldNames;
119        ivar_U=ivar;
120    end
121    if strcmp(role{var_ind(ivar)},'vector_x_tps')
122        Field.VarAttribute{ivar}.FieldName=FieldNames;
123        ivar_U_tps=ivar;
124    end
125%     Field.VarAttribute{ivar}.Unit=units{var_ind(ivar)};
126    Field.VarAttribute{ivar}.Mesh=0.1;%typical mesh for histograms O.1 pixel
127end
128if ~isempty(ivar_U_tps)
129    Field.VarAttribute{ivar_U}.VarIndex_tps=ivar_U_tps;
130end
131
132Field.ListGlobalAttribute=[Field.ListGlobalAttribute {'NbCoord','NbDim','TimeUnit','CoordUnit'}];
133% %% update list of global attributes
134Field.NbCoord=2;
135Field.NbDim=2;
136Field.TimeUnit='s';
137Field.CoordUnit='pixel';
138
139%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
140% [var,role,units,vel_type_out]=varcivx_generator(FieldNames,vel_type)
141%INPUT:
142% FieldNames =cell of field names to get, which can contain the strings:
143%             'ima_cor': image correlation, vec_c or vec2_C
144%             'vort','div','strain': requires velocity derivatives DUDX...
145%             'error': error estimate (vec_E or vec2_E)
146%             
147% vel_type: character string indicating the types of velocity fields to read ('civ1','civ2'...)
148%            if vel_type=[] or'*', a  priority choice is done, civ2 considered better than civ1 )
149
150function [var,role,vel_type_out,errormsg]=varcivx_generator(FieldRequest,vel_type,CivStage)
151
152%% default input values
153if ~exist('vel_type','var'),vel_type='';end;
154if iscell(vel_type),vel_type=vel_type{1}; end;%transform cell to string if needed
155errormsg='';
156
157%% select the priority order for automatic vel_type selection
158if strcmp(vel_type,'civ2') && strcmp(FieldRequest,'derivatives')
159    vel_type='filter2';
160elseif strcmp(vel_type,'civ1') && strcmp(FieldRequest,'derivatives')
161    vel_type='filter1';
162end
163if isempty(vel_type)||strcmp(vel_type,'*')
164    switch CivStage
165        case {6} %filter2 available
166            vel_type='filter2';
167        case {4,5}% civ2 available but not filter2
168            if strcmp(FieldRequest,'derivatives')% derivatives needed
169                vel_type='filter1';
170            else
171                vel_type='civ2';
172            end
173        case 3
174            vel_type='filter1';
175        case {1,2}% civ1 available but not filter1
176            vel_type='civ1';
177    end
178end
179
180var={};
181switch vel_type
182    case 'civ1'
183        var={'X','Y','Z','U','V','W','C','F','FF';...
184            'Civ1_X','Civ1_Y','Civ1_Z','Civ1_U','Civ1_V','Civ1_W','Civ1_C','Civ1_F','Civ1_FF'};
185        role={'coord_x','coord_y','coord_z','vector_x','vector_y','vector_z','ancillary','warnflag','errorflag'};
186    %    units={'pixel','pixel','pixel','pixel','pixel','pixel','','',''};
187    case 'filter1'
188        var={'X','Y','Z','U','V','W','C','F','FF','Coord_tps','U_tps','V_tps','W_tps','SubRange','NbSites';...
189            'Civ1_X','Civ1_Y','Civ1_Z','Civ1_U_smooth','Civ1_V_smooth','Civ1_W','Civ1_C','Civ1_F','Civ1_FF',...
190            'Civ1_Coord_tps','Civ1_U_tps','Civ1_V_tps','Civ1_W_tps','Civ1_SubRange','Civ1_NbSites'};
191        role={'coord_x','coord_y','coord_z','vector_x','vector_y','vector_z','ancillary','warnflag','errorflag','coord_tps','vector_x_tps',...
192            'vector_y_tps','vector_z_tps','ancillary','ancillary'};
193     %   units={'pixel','pixel','pixel','pixel','pixel','pixel','','','','pixel','pixel','pixel','pixel','pixel',''};
194    case 'civ2'
195        var={'X','Y','Z','U','V','W','C','F','FF';...
196            'Civ2_X','Civ2_Y','Civ2_Z','Civ2_U','Civ2_V','Civ2_W','Civ2_C','Civ2_F','Civ2_FF'};
197        role={'coord_x','coord_y','coord_z','vector_x','vector_y','vector_z','ancillary','warnflag','errorflag'};
198      %  units={'pixel','pixel','pixel','pixel','pixel','pixel','','',''};
199    case 'filter2'
200        var={'X','Y','Z','U','V','W','C','F','FF','Coord_tps','U_tps','V_tps','W_tps','SubRange','NbSites';...
201            'Civ2_X','Civ2_Y','Civ2_Z','Civ2_U_smooth','Civ2_V_smooth','Civ2_W','Civ2_C','Civ2_F','Civ2_FF',...
202            'Civ2_Coord_tps','Civ2_U_tps','Civ2_V_tps','','Civ2_SubRange','Civ2_NbSites'};
203        role={'coord_x','coord_y','coord_z','vector_x','vector_y','vector_z','ancillary','warnflag','errorflag','coord_tps','vector_x_tps',...
204            'vector_y_tps','vector_z_tps','ancillary','ancillary'};
205       % units={'pixel','pixel','pixel','pixel','pixel','pixel','','','','pixel','pixel','pixel','pixel','pixel',''};
206end
207if ~strcmp(FieldRequest,'interp_tps')
208    var=var(:,1:9);%suppress tps if not needed
209end
210vel_type_out=vel_type;
211
212
213
214
215
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