import an easy file

5 ビュー (過去 30 日間)
Erik Verdijk
Erik Verdijk 2018 年 3 月 29 日
コメント済み: Elias Gule 2018 年 3 月 29 日
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 件のコメント
Erik Verdijk
Erik Verdijk 2018 年 3 月 29 日
編集済み: per isakson 2018 年 3 月 29 日
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);
Erik Verdijk
Erik Verdijk 2018 年 3 月 29 日
and I get an empty matrix

サインインしてコメントする。

採用された回答

Elias Gule
Elias Gule 2018 年 3 月 29 日
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 件のコメント
Elias Gule
Elias Gule 2018 年 3 月 29 日
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));
Elias Gule
Elias Gule 2018 年 3 月 29 日
Please change your delimiter option from "tab" to "\t".

サインインしてコメントする。

その他の回答 (0 件)

カテゴリ

Help Center および File ExchangeLow-Level File I/O についてさらに検索

タグ

Community Treasure Hunt

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

Start Hunting!

Translated by