how do you program the file path when you do not know where the person will save the matlab file you send them?

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shawny badanjek
shawny badanjek 2020-5-15
评论： Walter Roberson 2020-5-19
I have a program that reads in a graphic .tiff file that I saved in the same folder as my matlab program. I have the file path set to the saved folder. When I email my matlab program and graphic file to someone to use, how do I get program to work when I do not know where they will save the files and so do not know the future file path? Here is code section:
%this is where user is shown the diagram picture
fprintf('Look at figure 1 to see your input choices: \n \n');
%read in the picture of the beam and inputs
beamPic = imread('C:\mymatlab\beam.tiff');
%the file path above needs to be changed depending where you save files
%show the beam pictures
imshow(beamPic);
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Walter Roberson
Walter Roberson 2020-5-19
I already answered, https://www.mathworks.com/matlabcentral/answers/525797-how-do-you-program-the-file-path-when-you-do-not-know-where-the-person-will-save-the-matlab-file-you#answer_432769

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回答（3 个）

James Tursa
James Tursa 2020-5-15
If you don't want to write code to search multiple directories to find the files, your code is going to have to ask the user to input the directory.
  2 个评论
shawny badanjek
shawny badanjek 2020-5-16
thank you that is what i was afraid of
How do I make matlab search mulyiple directories?
Why can't matlab piggy back a file that it needs to work just like if we were talking about a function. Like volume but in cubic yards I could have a function that the main program neeeds to work properly. I think I am missing something here or this sharing of programs would be worthless. I want my files to all be saved in their own directory together in one click. In java I can make all my dependant programs cohabitate. Why can I not have matlab treat them the same way? If I have a function my program needs, why should it ot be required to be attached?
Rik
Rik 2020-5-16
If you send the files together it is up to the user to not separate them. So I don't really understand what feature you are asking for.
You can retrieve the path of function and see if the tiff file is in that folder. Would that solve it?

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jessupj
jessupj 2020-5-15
DIRS = dir('**/beam.tiff'); % gets a structured list of matching files
% ...
% additional criterion here to choose which to pick.
k=1; % assume you want the first match
beamPic = imread( [DIRS(k).folder '/beam.tiff']) % maybe
imshow(beamPic);
Walter Roberson
Walter Roberson 2020-5-16
If sending the source code is okay, then bundle an app
https://www.mathworks.com/help/matlab/packaging-guis-as-apps.html
You would use mfilename('fullpath') to find out the name of the .m file, and could then extract the directory part with fileparts()
If you are building a .exe then tell the application compiler to add the file to the executable, and then in the program open it without providing a path. The file will be unbundled into a temporary directory whose name you can get with ctfroot() .

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