i am getting an error " mcc require the program to assign the value to output argument logistic"

 Main error coming i command window is given below:

Undefined function or method 'logistic' for input arguments of type 'double'.

Error in ==> TS>feed_forward_signals at 316 V_OUT(row) = logistic(V_OUT(row));

Part of Code is given here:

function logistic=x

      if x>100.0
            x=1.0;
        else if x<-100
                x=0.0;

        else x=1.0/(1.0+exp(-x));
            end
      end
    end

function [V_OUT]= feed_forward_signals(MAT_INOUT, V_IN, V_OUT, V_BIAS, size1, size2, layer)
for row = 1:size2
  V_OUT(row)=0;
  for col = 1:size1
      V_OUT(row)=V_OUT(row)+MAT_INOUT(row, col)*V_IN(col);
  end
  V_OUT(row)=V_OUT(row)+V_BIAS(row); 
end
if layer==0
V_OUT(row) = exp(V_OUT(row));
end
if layer==1
    V_OUT(row) = logistic(V_OUT(row));
 end

Answer 1

[Phillip]

Hi

Your function definition of logistic is wrong: You have:

function logistic=x

It should rather be something like:

function y = logistic(x)

Hence matlab is not seeing logistic as a valid function.

Regards, Phil

[vandana]

Thank you very much...:)

Hi i have changed my program as and now is is running without error but results are not coming correct. can you please check once. Code after correction

function x=logistic(x)

      if x>100.0
            x=1.0;
        else if x<-100
                x=0.0;

        else x=1.0/(1.0+exp(-x));
            end
      end

    end

function [V_OUT]= feed_forward_signals(MAT_INOUT, V_IN, V_OUT, V_BIAS, size1, size2, layer)
for row = 1:size2
  V_OUT(row)=0;
  for col = 1:size1
      V_OUT(row)=V_OUT(row)+MAT_INOUT(row, col)*V_IN(col);
  end
  V_OUT(row)=V_OUT(row)+V_BIAS(row); 
end
if layer==0
V_OUT(row) = exp(V_OUT(row));
end
if layer==1
    V_OUT(row) = logistic(V_OUT(row));
 end