I know it is a easy question, but I should be extremely grateful if someone give me and answer. I have a string with a complete path. How do I Import this textfile? I know it is stupid, but i shoud thank you 1000 times if you cam help me. I get the message unable to import file.

4 个评论

please attach your text file, I can help you as soon as now!
What code are you using to import the file? Because the error text is not a usual error message.
clear all;
close all;
[FileName,PathName] = uigetfile('../*.csv','MultiSelect','off','title','path');
fileID = fopen(FileName);
C = textscan(fileID,'%d%d%d%s%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d','HeaderLines',80,'Delimiter','/t');
fclose(fileID);
and I get an empty matrix

请先登录,再进行评论。

 采纳的回答

In this code:
[FileName,PathName] = uigetfile('../*.csv','MultiSelect','off','title','path');
FileName is simply the name of the file you selected. So if the file is not located in the present working directory, fopen will not be able to read it. So it will return an fid of -1, which is an invalid file 'pointer'.
What you need is to supply the full path of the file to fopen. So doing this:
fid = fopen(fullfile(PathName,FileName));
will return a valid file 'pointer'.

3 个评论

clear all; close all; answer = 4;
while answer > 1 [FileName,PathName] = uigetfile('../*.txt','MultiSelect','off','title','path'); fid = fopen(fullfile(PathName,FileName)); fileID = fopen(fid); C = textscan(fileID,'%d%d%d%s%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d','HeaderLines',80,'Delimiter','tab'); fclose(fileID); answer = questdlg('Do you want to select an other file?', ... 'Options', ... 'Yes','No','No'); switch answer case 'Yes' answer = 4; case 'No' answer = 1; end while answer > 3 [FileName,PathName] = uigetfile('../*.txt','MultiSelect','off','title','path'); fileID = fopen(FileName); C = textscan(fileID,'%d%d%d%s%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d','HeaderLines',80,'Delimiter','tab'); fclose(fileID); answer = questdlg('Do you want to select an other file?', ... 'Options', ... 'Yes','No','No'); switch answer case 'Yes' answer = 4; case 'No' answer = 1; end end end
You made a little error.
fid = fopen(fullfile(PathName,FileName)); fileID = fopen(fid);
Is the one that causes the problem.
What you referred to as fileID, is actually what I referred to as fid. So change this line to:
fileID = fopen(fullfile(PathName,FileName));
Please change your delimiter option from "tab" to "\t".

请先登录,再进行评论。

更多回答(0 个)

类别

帮助中心File Exchange 中查找有关 Low-Level File I/O 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by