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How to load data from other directory?

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Mr M.
Mr M. el 26 de Nov. de 2015
Comentada: Moon el 3 de Mzo. de 2024
I want to load data from other director, but I want to set relative path instead of absolute. So how to step back from current directory? /..

Respuestas (5)

Stephen23
Stephen23 el 26 de Nov. de 2015
Editada: Walter Roberson el 5 de Feb. de 2021
This is explained quite well in the documentation:
Under the title "Absolute and Relative Path Names" there is the following information:
Some MATLAB functions also support relative path names. Unless otherwise noted, the path name is relative to the current folder. For example:
  • myfile.m refers to the myfile.m file in the current folder.
  • ./myfolder refers to the myfolder folder in the current folder.
  • ../myfolder/myfile.m refers to the myfile.m file in the myfolder folder, where myfolder is at same level as the current folder. Each repetition of ../ at the beginning of the path moves up an additional folder level.
  2 comentarios
Pen-Li (Ben) Yu
Pen-Li (Ben) Yu el 5 de Feb. de 2021
To refer to the myfolder folder in the current folder, a forward slash shall not be employed:
  • myfolder refers to the myfolder folder in the current folder.
Walter Roberson
Walter Roberson el 5 de Feb. de 2021
Stephen got tripped up by conversion to bullet form.
Using ./myfolder (with leading period) is a valid way to refer to myfolder within the current folder. It has some advantages in that using ./myfolder tells MATLAB not to search for myfolder along the MATLAB path. For example
exist('./myfolder', 'dir') %is there one HERE ??
exist('myfolder', 'dir') %is there one somewhere on the path ?

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sarwat firoz
sarwat firoz el 14 de Dic. de 2020
Case 1: If your file is in the same folder, as the file you are using to load the data.
load fileName;
Case 2: If your file is in a folder INSIDE your directory,
load folderName/fileName;
Case 3: If your file is one step OUTSIDE your directory,
load ../fileName;
Case 4: If your file is n step OUTSIDE your directory,
load ../../../../ ... ... ... ../../fileName;
% Please make as many as ../ as much as up you want to go in folder structure.
% Kindly ignore ellipsis.
Case 5: If you wanna go up 2 folders and from there you wanna enter a separate folder structure,
load ../../folderStructure/fileName;
% Please use it the way you want.
P.S. Windows users can use either backward slash or Linux.
References:
  1. GNU Octave Free your Numbers
  2. GNU Octave (version 6.1.0)
  1 comentario
Moon
Moon el 3 de Mzo. de 2024
for case 5, how do I specify folder structure

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Titus Edelhofer
Titus Edelhofer el 26 de Nov. de 2015
Editada: Titus Edelhofer el 26 de Nov. de 2015
Hi,
you simply need to remove the / at the beginning:
dir ..\temp
dir ..\..\anotherFolder\anotherSubfolder
Note: replace "\" of course with "/" on Linux or OSX
Or use the generic functions:
% go to folders up the hierarchy:
upUpFolder = fileparts(fileparts(pwd));
% go into another folder
folder = fullfile(upUpFolder, 'subFolder');
% do whatever you like
dir(folder)
Titus

Thorsten
Thorsten el 26 de Nov. de 2015
Editada: Thorsten el 26 de Nov. de 2015
Use '..' to refer to the folder that contains the current folder. To load ../folderName1/folderName1/filename.ext robustly on different OSs, use:
load(fullfile('..', 'folderName1', 'folderName2', 'filename.ext'))
you can add as much folderNames as you need.
  1 comentario
Titus Edelhofer
Titus Edelhofer el 27 de Nov. de 2015
Jepp, that's easier than using fileparts ...

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Suhas gowda
Suhas gowda el 6 de Mayo de 2023
This works well for me
[file,path] = uigetfile('*.mat'); % opens file selection dialog box. You may choose data from different folder
A=importdata(strcat(path,file)); % data will be imported from the specified path
  1 comentario
Walter Roberson
Walter Roberson el 6 de Mayo de 2023
The path returned by uigetfile does not reliably end in a directory separator. Using strcat(path, filename) will sometimes fail. We recommend that you use fullfile(path, filename) which will ensure that correct separators are used.

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