Index: /trunk/src/find_field_cells.m
===================================================================
--- /trunk/src/find_field_cells.m	(revision 1084)
+++ /trunk/src/find_field_cells.m	(revision 1085)
@@ -155,5 +155,5 @@
 for iscalar=1:numel(ind_scalar) 
     icell=[];
-    for iprev=1:numel(DimCell)-1
+    for iprev=1:numel(DimCell)
         if isequal(DimCell{iprev},Data.VarDimName{ind_scalar(iscalar)})
             icell=iprev;
Index: /trunk/src/phys_ima.m
===================================================================
--- /trunk/src/phys_ima.m	(revision 1084)
+++ /trunk/src/phys_ima.m	(revision 1085)
@@ -66,5 +66,5 @@
         % the image needs to be interpolated to the new coordinates
         Z=0; %default
-        if isfield(Calib,'SliceCoord') %.Z= index of plane
+        if isfield(Calib,'SliceCoord')&& size(Calib.SliceCoord,1)>=ZIndex %.Z= index of plane
             SliceCoord=Calib.SliceCoord(ZIndex,:);
             Z=SliceCoord(3);
Index: /trunk/src/proj_field.m
===================================================================
--- /trunk/src/proj_field.m	(revision 1084)
+++ /trunk/src/proj_field.m	(revision 1085)
@@ -672,5 +672,5 @@
     %identify error flag
     errorflag=0; %default, no error flag
-    if isfield(CellInfo{icell},'VarIndex_errorflag');% test for error flag
+    if isfield(CellInfo{icell},'VarIndex_errorflag')% test for error flag
         FFName=FieldData.ListVarName{CellInfo{icell}.VarIndex_errorflag};
         errorflag=FieldData.(FFName);
Index: /trunk/src/series.m
===================================================================
--- /trunk/src/series.m	(revision 1084)
+++ /trunk/src/series.m	(revision 1085)
@@ -2093,5 +2093,6 @@
             % create file containing the list of jobs
             ListProcess=fullfile(DIR_CLUSTER,'job_list.txt'); % name of the file containing the list of executables
-            fid=fopen(ListProcess,'w'); % open it for writting
+            [fid,errormsg]=fopen(ListProcess,'w'); % open it for writting
+            if isempty(errormsg)
             for iprocess=1:length(batch_file_list)
                 fprintf(fid,[batch_file_list{iprocess} '\n']); % write list of exe files
@@ -2099,5 +2100,7 @@
             fclose(fid);
             system(['chmod +x ' ListProcess]); % set the file to executable
-            
+            else
+                errormsg=['error for writting the executable file:' errormsg];
+            end       
             CPUTimeProcess=CPUTime*BlockLength*nbfield_j; % estimated CPU time for one individual process (in minutes)
             LaunchCmdFcn=SeriesData.SeriesParam.ClusterParam.LaunchCmdFcn;
Index: /trunk/src/series/aver_spectral.m
===================================================================
--- /trunk/src/series/aver_spectral.m	(revision 1085)
+++ /trunk/src/series/aver_spectral.m	(revision 1085)
@@ -0,0 +1,245 @@
+%'aver_stat': calculate field average over a time series
+%------------------------------------------------------------------------
+% function ParamOut=aver_stat(Param)
+%
+%%%%%%%%%%% GENERAL TO ALL SERIES ACTION FCTS %%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+%OUTPUT
+% ParamOut: sets options in the GUI series.fig needed for the function
+%
+%INPUT:
+% In run mode, the input parameters are given as a Matlab structure Param copied from the GUI series.
+% In batch mode, Param is the name of the corresponding xml file containing the same information
+% when Param.Action.RUN=0 (as activated when the current Action is selected
+% in series), the function ouput paramOut set the activation of the needed GUI elements
+%
+% Param contains the elements:(use the menu bar command 'export/GUI config' in series to 
+% see the current structure Param)
+%    .InputTable: cell of input file names, (several lines for multiple input)
+%                      each line decomposed as {RootPath,SubDir,Rootfile,NomType,Extension}
+%    .OutputSubDir: name of the subdirectory for data outputs
+%    .OutputDirExt: directory extension for data outputs
+%    .Action: .ActionName: name of the current activated function
+%             .ActionPath:   path of the current activated function
+%             .ActionExt: fct extension ('.m', Matlab fct, '.sh', compiled   Matlab fct
+%             .RUN =0 for GUI input, =1 for function activation
+%             .RunMode='local','background', 'cluster': type of function  use
+%             
+%    .IndexRange: set the file or frame indices on which the action must be performed
+%    .FieldTransform: .TransformName: name of the selected transform function
+%                     .TransformPath:   path  of the selected transform function
+%    .InputFields: sub structure describing the input fields withfields
+%              .FieldName: name(s) of the field
+%              .VelType: velocity type
+%              .FieldName_1: name of the second field in case of two input series
+%              .VelType_1: velocity type of the second field in case of two input series
+%              .Coord_y: name of y coordinate variable
+%              .Coord_x: name of x coordinate variable
+%    .ProjObject: %sub structure describing a projection object (read from ancillary GUI set_object)
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%=======================================================================
+% Copyright 2008-2020, LEGI UMR 5519 / CNRS UGA G-INP, Grenoble, France
+%   http://www.legi.grenoble-inp.fr
+%   Joel.Sommeria - Joel.Sommeria (A) legi.cnrs.fr
+%
+%     This file is part of the toolbox UVMAT.
+%
+%     UVMAT 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.
+%
+%     UVMAT 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 (see LICENSE.txt) for more details.
+%=======================================================================
+
+function ParamOut=aver_synchro(Param)
+
+%% set the input elements needed on the GUI series when the action is selected in the menu ActionName
+if isstruct(Param) && isequal(Param.Action.RUN,0)
+    ParamOut.AllowInputSort='off';% allow alphabetic sorting of the list of input file SubDir (options 'off'/'on', 'off' by default)
+    ParamOut.WholeIndexRange='off';% prescribes the file index ranges from min to max (options 'off'/'on', 'off' by default)
+    ParamOut.NbSlice='on'; %nbre of slices ('off' by default)
+    ParamOut.VelType='two';% menu for selecting the velocity type (options 'off'/'one'/'two',  'off' by default)
+    ParamOut.FieldName='two';% menu for selecting the field (s) in the input file(options 'off'/'one'/'two', 'off' by default)
+    ParamOut.FieldTransform = 'on';%can use a transform function
+    ParamOut.ProjObject='on';%can use projection object(option 'off'/'on',
+    ParamOut.Mask='off';%can use mask option   (option 'off'/'on', 'off' by default)
+    ParamOut.OutputDirExt='.synchro_multi';%set the output dir extension
+    ParamOut.OutputFileMode='NbSlice';% '=NbInput': 1 output file per input file index, '=NbInput_i': 1 file per input file index i, '=NbSlice': 1 file per slice
+    %     filecell=get_file_series(Param);%check existence of the first input file
+    %     if ~exist(filecell{1,1},'file')
+    %         msgbox_uvmat('WARNING','the first input file does not exist')
+    %     end
+    def={''};
+    if isfield (Param,'ActionInput')&& isfield(Param.ActionInput,'WavePeriod')
+        def=Param.ActionInput.WavePeriod;
+        
+        def={num2str(def)};
+    end
+    prompt={'wave period'};
+    dlgTitle='primary period';
+    lineNo=1;
+    answer=inputdlg(prompt,dlgTitle,lineNo,def);
+    ParamOut.ActionInput.WavePeriod=str2num(answer{1});
+    return
+end
+
+%%%%%%%%%%%%  STANDARD PART  %%%%%%%%%%%%
+ParamOut=[];%default output
+%% read input parameters from an xml file if input is a file name (batch mode)
+checkrun=1;
+if ischar(Param)
+    Param=xml2struct(Param);% read Param as input file (batch case)
+    checkrun=0;
+end
+hseries=findobj(allchild(0),'Tag','series');
+RUNHandle=findobj(hseries,'Tag','RUN');%handle of RUN button in GUI series
+WaitbarHandle=findobj(hseries,'Tag','Waitbar');%handle of waitbar in GUI series
+
+%% define the directory for result file (with path=RootPath{1})
+OutputDir=[Param.OutputSubDir Param.OutputDirExt];
+    
+%% root input file(s) name, type and index series
+RootPath=Param.InputTable(:,1);
+RootFile=Param.InputTable(:,3);
+SubDir=Param.InputTable(:,2);
+NomType=Param.InputTable(:,4);
+FileExt=Param.InputTable(:,5);
+[filecell,i1_series,i2_series,j1_series,j2_series]=get_file_series(Param);
+FileInfo=get_file_info(filecell{1,1});
+ FileType=FileInfo.FileType;
+%%%%%%%%%%%%
+% The cell array filecell is the list of input file names, while
+% filecell{iview,fileindex}:
+%        iview: line in the table corresponding to a given file series
+%        fileindex: file index within  the file series, 
+% i1_series(iview,ref_j,ref_i)... are the corresponding arrays of indices i1,i2,j1,j2, depending on the input line iview and the two reference indices ref_i,ref_j 
+% i1_series(iview,fileindex) expresses the same indices as a 1D array in file indices
+%%%%%%%%%%%%
+nbview=numel(i1_series);%number of input file series (lines in InputTable)
+nbfield_j=size(i1_series{1},1); %nb of fields for the j index (bursts or volume slices)
+nbfield_i=size(i1_series{1},2); %nb of fields for the i index
+nbfield=nbfield_j*nbfield_i; %total number of fields
+
+%% determine the input file type 
+% if ~strcmp(FileType{1},'netcdf')
+%     displ_uvmat('ERROR','netcdf file series with field projected on a regular mesh must be put as input')
+%     return
+% end
+
+%% calibration data and timing: read the ImaDoc files
+[XmlData,NbSlice_calib,time,errormsg]=read_multimadoc(RootPath,SubDir,RootFile,FileExt,i1_series,i2_series,j1_series,j2_series);
+% if size(time,1)>1
+%     diff_time=max(max(diff(time)));
+%     if diff_time>0
+%         msgbox_uvmat('WARNING',['times of series differ by (max) ' num2str(diff_time)])
+%     end   
+% end
+
+%% coordinate transform or other user defined transform
+transform_fct='';%default
+if isfield(Param,'FieldTransform')&&~isempty(Param.FieldTransform.TransformName)
+    addpath(Param.FieldTransform.TransformPath)
+    transform_fct=str2func(Param.FieldTransform.TransformName);
+    rmpath(Param.FieldTransform.TransformPath)
+end
+
+%% settings for the output file
+NomTypeOut=nomtype2pair(NomType{1});% determine the index nomenclature type for the output file
+first_i=i1_series{1}(1);
+last_i=i1_series{1}(end);
+if isempty(j1_series{1})% if there is no second index j
+    first_j=1;last_j=1;
+else
+    first_j=j1_series{1}(1);
+    last_j=j1_series{1}(end);
+end
+
+%% Set field names and velocity types
+InputFields{1}=[];%default (case of images)
+if isfield(Param,'InputFields')
+    InputFields{1}=Param.InputFields;
+end
+
+main_period=Param.ActionInput.WavePeriod;
+main_frequency=2*pi/main_period;
+frequency=(0:main_frequency/16:3*main_frequency)';
+nbfrequency=numel(frequency);
+%%%%%%%%%%%%%%%% loop on field indices %%%%%%%%%%%%%%%%
+for index=1:nbfield
+    index
+    update_waitbar(WaitbarHandle,index/nbfield)
+    if ~isempty(RUNHandle)&& ~strcmp(get(RUNHandle,'BusyAction'),'queue')
+        disp('program stopped by user')
+        break
+    end
+    
+    % reading input file(s)
+    [Data,tild,errormsg] = read_field(filecell{1,index},FileType,InputFields{1});
+    if ~isempty(errormsg)
+        displ_uvmat('ERROR',['error of input reading: ' errormsg],checkrun);
+        break
+    end
+    if ~isempty(NbSlice_calib)
+        Data.ZIndex=mod(i1_series{1}(index)-1,NbSlice_calib{1})+1;%Zindex for phys transform
+    end
+    %initiate average
+    if index==1
+        nby=numel(Data.coord_y);
+        nbx=numel(Data.coord_x);
+        cos_U=zeros(nbfrequency,numel(Data.coord_y),numel(Data.coord_x));
+        sin_U=zeros(nbfrequency,numel(Data.coord_y),numel(Data.coord_x));
+        cos_V=zeros(nbfrequency,numel(Data.coord_y),numel(Data.coord_x));
+        sin_V=zeros(nbfrequency,numel(Data.coord_y),numel(Data.coord_x));
+        NbField=zeros(nbfrequency,numel(Data.coord_y),numel(Data.coord_x));
+    end
+    %update average
+    FF=isnan(Data.U)|isnan(Data.V);% check NaN values
+    Data.U(FF)=0;% set to zero the NaN values
+    Data.V(FF)=0;
+    for ifreq=1:nbfrequency
+        NbField(ifreq,:,:)=NbField(ifreq,:,:)+reshape(~FF,1,nby,nbx);%count the NaN values
+        cos_U(ifreq,:,:)=cos_U(ifreq,:,:)+reshape(Data.U,1,nby,nbx)*cos(Data.Time*frequency(ifreq));
+        sin_U(ifreq,:,:)=sin_U(ifreq,:,:)+reshape(Data.U,1,nby,nbx)*sin(Data.Time*frequency(ifreq));
+        cos_V(ifreq,:,:)=cos_V(ifreq,:,:)+reshape(Data.V,1,nby,nbx)*cos(Data.Time*frequency(ifreq));
+        sin_V(ifreq,:,:)=sin_V(ifreq,:,:)+reshape(Data.V,1,nby,nbx)*sin(Data.Time*frequency(ifreq));
+    end
+end
+
+%%%%%%%%%%%%%%%%%%%%%%%%
+Data.ListVarName={'coord_x','coord_y','frequency','cos_U','cos_V','sin_U','sin_V','a_U','a_V','phase_U','phase_V'};
+%Data.ListVarName=[{'coord_y','coord_x'} Data.ListVarName];
+Data.VarDimName={'coord_x', 'coord_y','frequency'};
+for ilist=1:numel(Data.ListVarName)-3
+    Data.VarDimName{ilist+3}={'frequency','coord_y','coord_x'};
+end
+Data.frequency=frequency;
+Data.cos_U=cos_U./NbField;
+Data.sin_U=sin_U./NbField;
+Data.cos_V=cos_V./NbField;
+Data.sin_V=sin_V./NbField;
+Data.a_U=sqrt(2)*sqrt(Data.cos_U.*Data.cos_U+Data.sin_U.*Data.sin_U);
+Data.a_V=sqrt(2)*sqrt(Data.cos_V.*Data.cos_V+Data.sin_V.*Data.sin_V);
+Data.phase_U=angle(Data.cos_U+1i*Data.sin_U);
+Data.phase_V=angle(Data.cos_V+1i*Data.sin_V);
+
+
+%% write the results
+OutputFile=fullfile_uvmat(RootPath{1},OutputDir,RootFile{1},'.nc','',1);
+errormsg=struct2nc(OutputFile,Data);% write the output file
+if isempty(errormsg)
+    disp_uvmat('CONFIRMATION',[OutputFile ' successfully written'],checkrun)
+else
+    disp_uvmat('ERROR',errormsg,checkrun)
+end
+    
+
+%% open the result file with uvmat (in RUN mode)
+% if checkrun
+%     uvmat(OutputFile)% open the last result file with uvmat
+% end
+'#### THE END ####'
Index: /trunk/src/series/time_series.m
===================================================================
--- /trunk/src/series/time_series.m	(revision 1084)
+++ /trunk/src/series/time_series.m	(revision 1085)
@@ -81,10 +81,5 @@
     hhseries=guidata(hseries);
     if  ~isfield(Param,'ProjObject')
-        answer=msgbox_uvmat('INPUT_Y-N','use a projection object for the time_series?');
-        if strcmp(answer,'Yes')
-            set(hhseries.CheckObject,'Visible','on')
-            set(hhseries.CheckObject,'Value',1)
-            series('CheckObject_Callback',hseries,[],hhseries); %file input with xml reading  in uvmat, show the image in phys coordinates
-        end
+        msgbox_uvmat('WARNING','you may need to introduce a projection object for the time_series');
     end
     
