Question

I opened a File in Matlab using the a+ permission to read and write, and append data to end of file. I am able to write and append data to the file properly, but I am not able to read.
Though the file permission definition says reading and writing, I am not able to read. Can you please help me here? Anybody encountered this problem?

    fid = fopen('E:\code folder\Translation values.txt','a+')
    [Array] = fscanf(fid,'%f %f')

The array returned is empty. same is the problem with textscan as well. The Cell array is empty. But when I change the permission to r+, it works fine. Please help me.

Answer 1

The flag a+ stands for “append and read”, thus, the file position indicator pointer probably points to the end of the file. If so, you might need to call fseek or frewind before reading.