CD statment and connection from matlab to C# ?

i have created matlab file (function) which contains save statment i have to save image histogram value(Hist)

folder_name= 'query' ;
addpath(folder_name);
file_name = [folder_name 'image(1)'];
save(file_name,'Hist');

this runs perfectly using matlab with no problem the problem occurs when i run the code using C# after converting the matlab file to .dll file it cannot addpath to folder_name or find it although i have added the folder to the package of deployment tool

[Image Analyst]

What does "folder_name('query');" do? folder_name appears to be a function name, yet you're passing it to addpath, which would not make sense unless it returned something in the event you did not pass any arguments to it. What's going on there? And what is Hist? I presume it's a double or integer array. Also, you're better off using

file_name = fullfile(foldername 'image(1)');

Rather than the way you did it. But I'm not sure what foldername is . I know it's different than folder_name because it does not have an underline in it, but, like Hist, I guess it must come from prior code that you did not show us. All in all, this code is a mystery to me.

[Walter Roberson]

What is folder_name('query') ? And what is foldername ? Why are you wanting to add it to the path? And why are you not using fullfile() instead of manually concatenating the parts for the file_name ?

[sara selim]

folder_name is variable which contains the name of the folder which i wanna to save the image histogram into

[sara selim]

Hist is variable contains image histogram

[sara selim]

i have created 2 folder the fist contains all functions i have to use the the other is called query to save the image histogram into transposition between files into matlab is easy but after converting it to .dll file and use it with C# app i have an exeption that the query file doesnot exist so cannot save the file

[Jan]

I do not understand your comment. Please prefer short sentences to allow non-native speakers to follow.

Answer 1

[Walter Roberson]

When you use MATLAB Compiler to generate code, the code is not executed in the directory that it was originally compiled in, and the code is not executed in the directory that the user is in when they invoke the executable by name from a command window, and the code is not executed in the home directory of the user who clicked on an icon to launch the executable.

When you use MATLAB Compiler to generate code, then at run-time a temporary directory is created and the components are extracted into the directory, and the code is run from that directory. The root of that directory can be found using the function ctfroot(). Unfortunately I cannot look at the documentation for ctfroot. See http://www.mathworks.com/matlabcentral/answers/59148-for-stand-alone-exe-how-do-i-include-a-folder-of-files-and-know-how-to-access-them

[sara selim]

yup this exactly my problem could you suggest me solution ?

[Walter Roberson]

Use ctfroot and fullfile

folder_name= 'query';

if isdeployed
  folder_in_archive = fullfile(ctfroot, folder_name);
else
   %assume the current directory is in the right place
   folder_in_archive = fullfile(pwd, folder_name);
end

file_name = fullfile(folder_in_archive, 'image(1)');
save(file_name, 'Hist');

[sara selim]

finally it works thank you very much for your useful help

[Walter Roberson]

Please mark the Answer as accepted.

Answer 2

[Jan]

Beside the confusing usage of "folder_name" and "foldername" as functions or variables, there is no need to call addpath(folder_name) . Simply omit this line, when the rest is working as wanted.

[sara selim]

folder_name is variable which contains the name of the folder which i wanna to save the image histogram into