emlc issue

Hi i have been trying to convert my .m file into C generated code. So far it got stuck in the 'switch' function where it shows this error --Expected a numeric value. Found a mxArray

The code is shown below:-

 function [] = AIS2
  2
  3%
  4
  5
  6   % figure(1); clf;
  7  % v = cadeia(100,44,0,0,0);%v = [ab,ag] = cadeia(n1,s1,n2,s2,bip) n1 = Population size s1= size of vector
  8  
  9gen =500; P = 150;  fact=.2;  n = size(P,1);ts = 0.2;  Nc=100;beta = 5;  pm = 0.05; per = 0.0; N= Nc;   
 10nump = 3;%number of classes4
 11no = 3;%number of images per class
 12L = fact;
 13fitin = 0.2;
 14eml.extrinsic('sprintf')
 15eml.extrinsic('disp')
 16eml.extrinsic('input')
 17
 18
 19
 20
 21  disp(sprintf('** Clonal Selection Algorithm**\n')); 
 22   disp(sprintf('1)Hybrid technique\n'));
 23   disp(sprintf('2) CLONALNet\n'));
 24disp(sprintf('3)CLONALNet with Pattern Recognition\n'));
 25   
 26     *task = input('Please choose either one of the technique* (1),(2) or (3): ');
 27   *switch task*,
 28       case 1,
 29           [~,~,~,~,vfx,] = optimization2(P,gen,N,pm,per,fact,n,Nc,beta);%function call for optimization and vector for best fitness.
 30        case 2,
 31           [~,x,y,fx,vfx] = opt(ts,N,Nc,beta,gen);
 32            disp(sprintf('Minimum value found [x,y,f(x,y)]: [%2.10f,%2.10f,%2.10f]',x,y,fx));                
 33                 %save filename x y fx 
 34                 %vfx;
 35       case 3,                         
 36          
 37           % %Initialization of population within 3intervals (xmax/xmin/ymax/ymin)
 38   [C] = patternrecog(nump,no,gen,beta,fitin); 39   
 40 
 41
 42 %[Ab,x,y,fx,vfx,vmfit] = patternrecog(pm,per,N,gen,X);                   
 43      
 44       otherwise,
 45           disp('Please enter a valid value');
 46           return;
 47   end;

Kindly appreciate the help...

[Fangjun Jiang]

What is the '*' symbol in your code, such as *task=input(), *switch task*

Answer 1

[Fred Smith]

Hi Jeremiah,

Add the line task = 0; before the line task = input .....

This tells EMLC that you are expecting a double from the extrinsic MATLAB call to "input". Without this hint, EMLC does not have any idea what input will return and therefore will treat it as an mxArray.

Please refer to the documentation on extrinsic calls for a more detailed explanation.

HTH,

Fred

[Kaustubha Govind]

FYI: Here is the doc link: http://www.mathworks.com/help/toolbox/eml/ug/bq1h2z9-38.html#bq1h2z9-46

Another note - if you want to generate standalone C code out of this file, you need to get rid of the functions declared as eml.extrinsic.

[Jeremiah]

It worked.. Thanks guys...

[Jeremiah]

It means that you have to apply the eml.extrinsic command on each function to eliminate them from being compiled by MATLAB?

Answer 2

[Jeremiah]

Hi,

I have another similar issue. I got this error after compilation using emlc -. It says '??? Undefined function or variable 'a'. The first assignment to a local variable determines its class.'

[R,Q]=size(P); 
epochs = 500;      % number of iterations
goal_err = 10e-5;    % goal error
b1=a + (b-a) *rand(S1,1);     % Weights between Input and Hidden Neurons
b2=a + (b-a) *rand(S2,1);     % Weights between Hidden and Output Neurons
n1=W1*P;
A1=logsig(n1);%can change to Ab1 = (xmax + rand(N,1).*(xmin-xmax))./2;
b=-0.3;
W1=a + (b-a) *rand(S1,R);     % Weights between Input and Hidden Neurons
a=0.3;                            % define the range of random variables
W2=a + (b-a) *rand(S2,S1);    % Weights between Hidden and Output Neurons
n2=W2*A1;
A2=logsig(n2);%can change to  Ab2 = (ymax + rand(N,1).*(ymin-ymax))./2;
e=A2-T;
error =0.5* mean(mean(e.*e));

Is it something that i have to declare before the variable 'a'. I'm pretty sure that other variables might be affected too as well.