Solve the error 'not enough input arguments'

Hi guys, Anyone who can explain why I get the error 'not enough input arguments' in this function?

function[EMGNor] = findEMGNor(SmoothSignal,subjects,motion,EMGMax)
for i = 1:10
  for k = 1:3
    EMGNor.(subjects{i}).(motion{k}) =  ...
        SmoothSignal.(subjects{i}).(motion{k})(:,2:21) / (EMGMax.(subjects{i}));
  end
end
end

I taught I defined all the input arguments I used.

Thank you

[David Young]

It would help if you showed the whole error message. You probably also need to show the code that calls the function.

[Jan]

Edited: Code formatted properly.

Answer 1

[Jan]

Let me guess: How do you call this function? Does the call contain all 4 input arguments?

EMGNor = findEMGNor(SmoothSignal, subjects, motion, EMGMax)

Answer 2

[John D'Errico]

Just because you define a variable in the base workspace, does not mean it will be automatically passed into the function when you "run" it. This is not how functions work. For example, mean is a function in MATLAB, provided by TMW.

Look at the help for mean.

help mean
mean   Average or mean value.
  S = mean(X) is the mean value of the elements in X if X is a vector. 
  For matrices, S is a row vector containing the mean value of each 
  column.

So mean takes an argument X, and computes the mean. I'll define avariable called X. See what happens.

X = rand(1,10);

run mean
Not enough input arguments.
Error in mean (line 66)
    [flag, omitnan] = parseInputs(flag, flag2, isFlag2Set);
Error in run (line 96)
evalin('caller', [script ';']);

Similarly, if I just type the command mean on the command line, it will again fail.

mean
Not enough input arguments.
Error in mean (line 66)
    [flag, omitnan] = parseInputs(flag, flag2, isFlag2Set);

In fact, in order to compute the mean of a variable, you need to use it like this:

mx = mean(X)
mx =
      0.62386

In fact, you can compute the mean of any array, NOT just an array called X.

mean(1:10)
ans =
          5.5