how can i open my files?

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cemsi888 2015-2-13

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https://ww2.mathworks.cn/matlabcentral/answers/178179-how-can-i-open-my-files

评论： Image Analyst 2015-2-24

hi everybody today i have one question too!! i use fopen function to open my Experiment datas. but the Name and Extension of files vary from each other. could you give me informations have can i read all files automatically.Inaddtion beginning of files Name differs from each other too. example: msa02_141121_mscc5_11.erg m4_cst_cc3_150206_01.e00 and here is my code too in order to read first file. As you can guess i have maybe more than 1000 files so i want to read them in Loop..

    clear all
clc
delimiter=';' ;
headerLines=4
formatSpec1 = '%s%s%s%s%s%[^\n\r]'
daten=fopen('msa02_141121_mscc5_11.erg','r')
zeile = textscan(daten,formatSpec1,181,'delimiter',';','headerLines',4)
fclose(daten);

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Image Analyst 2015-2-13

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https://ww2.mathworks.cn/matlabcentral/answers/178179-how-can-i-open-my-files#answer_167884

Use dir(), or sprintf() depending on what you know or don't know and how you want to do it. Code samples are in the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

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Stephen23 2015-2-16

编辑：Stephen23 2015-2-16

在 MATLAB Online 中打开

You don't show us how you are calling these functions, so it is hard to know what is happening. But there are a few points to pay attention to:

Why are there two callback functions? If you have one callback event, then the variables in one function workspace are not going to magically jump into the other workspace, so why do you separate them? For example there is no way for name to jump magically from loaddata_Callback to Read_Callback.
You do nothing inside the first for loop anyway, apart from assign one name value to C, which then never gets used. What is the point of that?
Calling fopen('C','r') will try to open a file named 'C' in the current directory. If you want to refer to the variable C, then you need to remove those single-quotes so that it is a variable and not a string.
Do not use path as a variable name, as path is already defined in MATLAB.
You should use fullfile rather than simply concatenating the path and filenames.
Why are the uigetfile file-types labeled as being 'All Matlab Files'? Those are not standard MATLAB file extensions.
Learn to use the semicolon to suppress displaying outputs.

Something like this should work:

function loadData_Callback(hObject, eventdata, handles)
%
[N_cell,P_str] = uigetfile({'*.erg';'*.e00'},'A better description','Multiselect','on');
%
for k = 1:numel(N_cell)*~isequal(0,P_str)
    temp = fullfile(P_str,N_cell{k});
    fid = fopen(temp,'r');
    zeile = textscan(fid,...)
    fclose(fid);
end

cemsi888 2015-2-16

编辑：cemsi888 2015-2-16

在 MATLAB Online 中打开

i have 2 callbackfunctions first button for open files second button read datas. i think if i use your code i will eleminate first button which is open files.

   function loadData_Callback(hObject, eventdata, handles)
[name,path]=uigetfile({'*.erg';'*.e00'},'All Matlab Files','Multiselect','on')
c=length([name])
for k=1:c
C=name
end
if isequal(name,0)|| isequal(path,0)
    fileName=''
else
    fileName=[path name]
end
%B=strcat(name)
set(handles,filePath,'string',fileName)
   %--- Executes on button press in Read.
function Read_Callback(hObject, eventdata, handles)
delimiter=';' ;
headerLines=4
formatSpec1 = '%s%s%s%s%s%[^\n\r]'
daten=fopen(C,'r')
zeile = textscan(daten,formatSpec1,181,'delimiter',';','headerLines',4)
fclose(daten);
   for i=1:length(zeile{1,1})
    tmp=zeile{1,1}{i}
    tmp=strrep(tmp,'.','_dot')
   zeile{1,1}(i)=cellstr(tmp);
  end
   for ind=1:size(zeile{1,1},1)
    Input_Mappe1.(zeile{1,1}{ind})=magic(size(zeile{1,1}{ind},1))
   end

Because I do not want to callculate sometimes whole files in my path!! thats why i divided my calculation first open files then read files!!!

cemsi888 2015-2-18

在 MATLAB Online 中打开

thanx for your help Imagealayst and Srephen Cobeldick i solve this Problem and i can see structure Array on my Workspace which contains my filenames too. the next step is i want to read my datas. but i take this massage from matlab: (without GUI my codes work !!!)

Error using textscan Invalid file identifier. Use fopen to generate a valid file identifier.

Error in gui_versuch>Read_Callback (line 93) zeile = textscan(daten,formatSpec1,181,'delimiter',';','headerLines',4)

Error in gui_mainfcn (line 96) feval(varargin{:});

Error in gui_versuch (line 42) gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)gui_versuch('Read_Callback',hObject,eventdata,guidata(hObject)) here is my code :

if % --- Executes on button press in Load.
function Load_Callback(hObject, eventdata, handles)
filename=uigetfile({'*.erg';'*.e00'},'description...','Multiselect','on')
handles.filename=filename;
guidata(hObject,handles)
assignin('base','handles',handles)
% --- Executes on button press in Read.
function Read_Callback(hObject, eventdata, handles)
filename=handles.filename
if%%%Probe für......11
delimiter=';'; 
headerLines=4;
formatSpec1 = '%s%s%s%s%s%[^\n\r]';
daten=fopen('filename{1}','r')
zeile = textscan(daten,formatSpec1,181,'delimiter',';','headerLines',4)
fclose(daten);
Could you help me please!!

Stephen23 2015-2-23

编辑：Stephen23 2015-2-23

"if i did not use assigin i can not see zeile on Workspace": correct, and this is exactly the point. By choosing to use assignin you are making your own life more difficult, as doing this requires dynamic names and writes over existing variables. Bad idea. You should not be using assignin to move variables around between workspaces. Consider instead:

Use the debugging tools to view a function workspace.
Use output arguments to return values from a function to the base workspace.

Each function (and base) has its own workspace. What happens inside a function should be invisible to the outside world: the algorithm is irrelevant, the only thing that matters is the output argument. The only time it should be necessary to look at a function's workspace is when it is being written or debugged, in which case the debugger is the best tool for this job. If you need to move data from a function workspace to another workspace, use the output arguments of the function itself. Learn to avoid assignin, and your code will become better, neater and more reliable.

cemsi888 2015-2-24

在 MATLAB Online 中打开

second question .i want to copy all paramaters in mappe_(i) thats why today i wrote new codes too .it creates Mappe_ structure Array but the Problem is all Mappe_ contains just the Parameters of last file that i Chose before . how can i solve this Problem ?

function Load_Callback(hObject, eventdata, handles)
filename=uigetfile({'*.e00';'*.erg'},'Pick a file','Multiselect','on')
handles.filename=filename;
guidata(hObject,handles)
assignin('base','handles',handles)

% --- Executes on button press in Read. function Read_Callback(hObject, eventdata, handles)

filename=handles.filename

   for i=1:length(handles.filename)
       temp=handles.filename{1,i}
       fid=fopen(temp,'r')
       delimiter=';'
       headerlines=4;
       formatSpec1 = '%s%s%s%s%s%[^\n\r]';
zeile= textscan(fid,formatSpec1,181,'delimiter',';','headerLines',4)
 meinmappe = cell(length(handles.filename),1);
    for j=1:length(handles.filename)
        meinmappe{j} = sprintf('Mappe_%u',j)
        end
 for j=1:length(handles.filename)
 assignin('base',meinmappe{j},zeile);  
 end
 assignin('base','zeile',zeile)
 assignin('base','temp',temp)
   fclose(fid);
   end

cemsi888 2015-2-24

for first question why occurs cell when i choose 2 files and why does not occur cell when i choose 1 file.

Image Analyst 2015-2-24

It needs to send back a cell array when there's a list of strings because all the strings may not be the same size. If there's just one I'd guess it's a string because that's a lot simpler and no cell array is required.

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