Question

I’m new to Matlab and I have a function and I need to display a variable from running the main file (but the main file does access the function)…

I have tried to use fprintf(n);

Thanks 🙂

Answer 1

MATLAB function fprintf() is very similar to fprintf() in C. If your variable n is an integer, then you should do

fprintf('%d\n', n);

An interesting feature is that you can also print multiple numeric values and literal text to the screen. For example

A1 = [9.9, 9900];
A2 = [8.8,  7.7 ; ...
      8800, 7700];
fprintf('X is %4.2f meters or %8.3f mm\n', A1, A2);

where %4.2f takes the element at the first column of A1 and %8.3f takes the second. In the sequence, it repeats for A2 printing its first line and later its second line. The output is

X is 9.90 meters or 9900.000 mm
X is 8.80 meters or 8800.000 mm
X is 7.70 meters or 7700.000 mm

If you want more details about the specifiers you can use with fprintf(), you should give a look at the MathWorks docs.