Unable to read data from text file in matlab

clc;

clear all;

close all;

fid = fopen('eeg.txt');

A = fscanf(fid,'%f');

fclose(fid);

when I am trying for run the code I got the following error:

Error using fscanf

Invalid file identifier. Use fopen to generate a valid file identifier.

Error in eeg (line 5)

A = fscanf(fid,'%d');

Kindly help me to get rid of this issue.

[Cameron]

Can you attach the file in question? It's hard to do anything without that.

Answer 1

[Bora Eryilmaz]

The file your are looking for is probably not there, or at least, not on the MATLAB path. See what fid is: if it is -1, then you haven't really opened the file, which would result in the error that you are observing:

fid = fopen('badfile.txt')

fid = -1

fscanf(fid, '%f')

Error using fscanf
Invalid file identifier. Use fopen to generate a valid file identifier.

To double check if the file is accessible by MATLAB, run:

 exist('eeg.txt', 'file')