suppressing output from user defined function

function f=fib(n);
f=ones(n,1);

for i=1:n-2;
    f(i+2,1)=f(i+1,1)+f(i,1);
end;

i have this function to calculate fibbonaci sequence, but i get outputs despite having semicolons on everything.

Can anyone tell me why?

Answer 1

[Jonathan Chin]

When you call your function use a semi colon at the end of the function to suppress the output.

try f=fib(n) and f=fib(n); in the command line to see the results

[Michael]

worked. i'm an idiot -_- Thanks man.

Answer 2

[Walter Roberson]

You have to put a semi-colon in the line that calls fib() to prevent the default output

abc = fib(19)

fib is called and returns an expression that is assigned to the variable, but the default action for assignment is to also display the result of the assignment. You would need

abc = fib(19);

to suppress it.

This is not under the control of the called function, which does not have control by the time MATLAB makes the decision about whether to output or not.

[Michael]

thanks.

[Yevgeniy Gorbachev]

That's not the case, though. plot has an output (`Line` object) but does not display it by default. Clearly there is some way to suppress the output from the callee. I'm currently trying to do that for some custom plotting functions and I can only find answers like this.

[Voss]

@Yevgeniy Gorbachev: See nargout.

X = 1;
Y = 2;

custom_func(X,Y)      % no output: no output shown

Z = custom_func(X,Y); % 1 output, suppressed with semicolon: output not shown

Z = custom_func(X,Y)  % 1 output, unsuppressed: output shown

Z = 3

function out = custom_func(x,y)
result = x+y;
if nargout
    out = result;
end
end

[Yevgeniy Gorbachev]

@Voss Exactly the behavior I'm looking for, thank you!

[Voss]

You're welcome!