Trying to set up a matrix, getting error message

This is my current code, every time I attempt to run it I get an error message that says "Index in position 1 exceeds array bounds." How do I fix this?

Matrix = fscanf(fid, '%f', [3, 4]);

Unrecognized function or variable 'fid'.

w = Matrix(1,:);

t = Matrix(2, : );

g = Matrix(3, : );

[VBBV]

% fid = 0;
% Matrix = fscanf(fid,'%f', [3, 4])
Matrix = [3, 4]  % if this is your input Matrix read

Matrix = 1×2

3 4

size([3 4])

ans = 1×2

1 2

w = Matrix(1,:);
t = Matrix(2, : );  % here is the error where you try to access non-existent row

Index in position 1 exceeds array bounds. Index must not exceed 1.

g = Matrix(3, : );

you try to access non-existent row for the Matrix vector whose size consists of only 1 row

Answer 1

[Voss]

Check the size of Matrix.

You may be able to use a different function to read your file, e.g., readmatrix instead of fopen/fscanf/fclose.

[TheSaint]

turns out my .txt file was messed up. Thanks anyway though.

Answer 2

[Walter Roberson]

You have accidentally created a variable named fscanf