I have error in the following code, the error is (Error in Example_random (line 3) if Initialization ), could you help me to fix the problem. Thank you.

function [Command,Exp]=Example_random(Exp,Initialization)

 if Initialization 
   Exp.Robots=2;
   Exp.Workspace= [0 0; 0 10; 10 10; 10 0];
   Exp.Animation.Title='[Random movements]';
   Exp.Initial_pose=[1 3 0; 9 7 pi]';
   Exp.Animation.Grid=0;
   Exp.Addons={'Map'};
V(1).Vertex=[ 5 2; 4 3; 6 4; 5 3];
V(2).Vertex=[ 4 5; 3 7; 2 8; 1 6; 2 5];
V(3).Vertex=[ 6 6; 7 7; 8 6];
V(4).Vertex=[10 0; 10 10];
V(5).Vertex=[ 0 0; 0 10];
V(6).Vertex=[ 0 10; 10 10];
V(7).Vertex=[ 0 0; 10 0];
Exp.Map.Obstacle=V;
for i=1:Exp.Robots
Exp=Add_sensor(Exp,i,'ProximitySensor');
Exp.Agent(i).Sensor(1).Range=0.3;
end
Command=[]; return
end
for i=1:Exp.Robots
if Exp.Agent(i).Sensor(1).Presence
Command(:,i)=[-0.2; 0];
elseif (Exp.Iteration>1)&&(Exp.History.Command(Exp.Iteration-1,1,i))<0,
Command(:,i)=[0; pi/2+rand(1)*pi];
else
Command(:,i)=[0.2; 0];
end
end

Answer 1

[Geoff Hayes]

Ameer - you haven't posted the error message so it is will be hard to guess what the problem is. Since line 3 is

if Initialization

the error message could be

 >> Example_random
 Error using Example_random (line 3)
 Not enough input arguments.

because you are calling the function Example_random and not passing in any input parameters. If this is the case, then you would need to pass in values for the input parameters of Exp and Initialization. Exp seems to be a struct of some kind and Initialization is a boolean (at least according to your code).

 >> [Command,Exp] = Example_random([], true);

Presumably if the second input parameter is false, then you would be passing in a struct that has already been initialized.

[Ameer Hamza]

Hello, thank you for your help, but there is still problem in code.

Error in Example_random (line 2)
 [Command,Exp] = Example_random([], true)

function [Command,Exp]=Example_random(Exp,Initialization)

   [Command,Exp] = Example_random([], true)
  if Initialization 
     Exp.Robots=2;
     Exp.Workspace= [0 0; 0 10; 10 10; 10 0];
     Exp.Animation.Title='[Random movements]';
     Exp.Initial_pose=[1 3 0; 9 7 pi]';
     Exp.Animation.Grid=0;
     Exp.Addons={'Map'};
  V(1).Vertex=[ 5 2; 4 3; 6 4; 5 3];
  V(2).Vertex=[ 4 5; 3 7; 2 8; 1 6; 2 5];
  V(3).Vertex=[ 6 6; 7 7; 8 6];
  V(4).Vertex=[10 0; 10 10];
  V(5).Vertex=[ 0 0; 0 10];
  V(6).Vertex=[ 0 10; 10 10];
  V(7).Vertex=[ 0 0; 10 0];
     Exp.Map.Obstacle=V;
  for i=1:Exp.Robots
  Exp=Add_sensor(Exp,i,'ProximitySensor');
  Exp.Agent(i).Sensor(1).Range=0.3;
  end
  Command=[]; return
  end
  for i=1:Exp.Robots
  if Exp.Agent(i).Sensor(1).Presence
  Command(:,i)=[-0.2; 0];
  elseif (Exp.Iteration>1)&&(Exp.History.Command(Exp.Iteration-1,1,i))<0,
  Command(:,i)=[0; pi/2+rand(1)*pi];
  else
  Command(:,i)=[0.2; 0];
  end
  end

[Walter Roberson]

Your code appears to be calling itself as the first thing it does.

It would help if you posted a copy of the error message.

[Ameer Hamza]

This is the error:

 Error in Example_random (line 2)
 [Command,Exp] = Example_random([], true)

[Walter Roberson]

Is there a message about recursion level being exceeded? Because your code is calling itself. You are defining a function Example_random and the first thing the function does is call Example_random, which is the function itself. The line

[Command,Exp] = Example_random([], true)

should be in some other file.

[Ameer Hamza]

When i deleted this [Command,Exp] = Example_random([], true) the code give this error: >> Example_random Not enough input arguments.

Error in Example_random (line 2) if Initialization In comment they solve it by [Command,Exp] = Example_random([], true) but after adding it, the code not working it has error.

[Geoff Hayes]

Ameer - you have to call this function from the command line (or from some other file). For example, at the command line you would do

 >> [Command,Exp] = Example_random([], true)

And this will call your Example_random function and pass in the correct parameters.