How can rectify this error Dimensions of matrices being concatenated are not consistent?

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DhanaLakshmiR 2018-4-13

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In parallel computing toolbox, I have included two workers(moving and avoidance).

spmd
first_run = true;
for i=1:2    
  if labindex == 1
     if first_run       
         a=[1;1;1];
         b=[2;2;2];
         c=[0;0;3];
         movingval = moving( a,b,c)
         xmov=movingval(1,:)
         ymov=movingval(2,:);
         altmov=movingval(3,:);
         first_run = false;
     else 
         [A1,A2,A3]= labReceive()                           
     end       
  else
          [B,B1,B2 ]= avoidance(1);
          xpos=B(1,:);
          ypos=B(2,:);
          alt=B(3,:);       
          labSend([B,B1,B2], 1);         
  end
end 
end

I need that avoidance function output arguments, each arguments getting from that function is of different size. So that only im receiving this "Dimensions of matrices being concatenated are not consistent" error. How can i get that values?If my question is not clear apologize me!

function moving= moving(input1,input2,input3)
movingsize=[3 1500];
end
function [positionsize,coordinatessize,waypointsize]= avoidance(input2)
positionsize = [3  1500]   %this variable is assigned with 3cross 1500 values
coordinatessize=[3 4]  %this variable is assigned with 3cross 4 values
waypointsize=[1]
end