ERROR Not enough input arguments.

Question

UserG UserG 2021-6-11

评论： UserG UserG 2021-6-11

Hi everyone, i am new in matlab so i dont know much.

i tried as a beginner to run this code but an error occurs saying "Not enough input arguments." What should i change?

function y=f11(x)

y=2*x+5;

end

Answer 1

John D'Errico 2021-6-11

编辑：John D'Errico 2021-6-11

You DON'T "run" a function. Run applies to scripts, and soon you will almost forget the run command ever existed, or so I hope.

You can use a function in your code, and in any code you write. For example, define that function, and save it to your search path as an m-file.

Now, USE IT! For example, at the command line in MATLAB:

f11(3)
ans = 11

Or like this:

u = 1:5;
z = f11(u)
z = 1×5
     7     9    11    13    15

Or, as long as f11 is on your search path, you can now call it in some other function. In this next example, I'll use it inside a function handle:

f22 = @(x) 2*f11(x)
f22 = function_handle with value:
    @(x)2*f11(x)
f22(3)
ans = 22

So f22 takes the result of f11 applied to x, and then multiplies that by 2.

function y=f11(x)
  y=2*x+5;
end

UserG UserG 2021-6-11

thank u very much.Now i understand.It worked !