Why I am getting the error "Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters."

for i = 1:NF

err_frame(:,i) = err'((i-1) * (1-OLR) + 1(i-1) * frame_length * (1-OLR) + frame_length);

end

Answer 1

[VBBV]

%if true
  for i = 1:NF
err_frame(:,i) = err((i-1) * (1-
%          ^ ' is used for transpose
OLR) + 1*(i-1) * frame_length * (1-
%       ^ implied multiplication 
OLR) + frame_length);
end

[Tazen Moushumi]

% ^ ' is used for transpose

I use it for transpose

[VBBV]

Yes. But use it at end of vector or Matrix like below

%if true
err(..).'

Not beginning