how to import a text file in to matlab

Hi all, just a quick question, how do I import a text file I have into matlab? Currently when I am writing my code I keep getting an error telling me Undefined variable "test1" or class "test1.txt".

filename = 'test1.txt';
delimiterIn = ',';
A = importdata(filename,delimiterIn);
fileID = fopen('test1.txt', 'r');
formatSpec = '%d %d %d %d';
sizeA = [4 Inf];
A = fscanf(test1.txt,formatSpec,Inf)
fclose(test1.txt);
A = A'

and I'm not too sure what is the problem with my code. Im really new to matlab so I would appreciate your help. Thank you!

Answer 1

[Rik]

You should use the fileID variable, as that is the handle to your file. You didn't define test1.txt as a variable of class, so Matlab doesn't know what you mean. So assuming no other bugs, this code should work:

filename = 'test1.txt';
delimiterIn = ',';
A = importdata(filename,delimiterIn);
fileID = fopen('test1.txt', 'r');
formatSpec = '%d %d %d %d';
sizeA = [4 Inf];
A = fscanf(fileID,formatSpec,Inf)
fclose(fileID);
A = A'