title: MATLAB won't return my outputs
body: <p>I have written a function in MATLAB but it will not return my outputs.  It returns the first output as ans=a # but that's it. I thought <code>function[argout1,argout2,...argoutn=funcname(in1,in2,...inn)</code> returns all outputs in the format <code>argout1= a #</code>, <code>argout2= a #</code>  and so on.</p>
  
  <p>I realize I could use <code>disp()</code> or some other built in function but what is the point in all that when you have a function file. The function is accessing the inputs from an excel spreadsheet but I didn't think that should make a difference. Any help would be greatly appreciated.</p>
  
  <p>The code is as follows.</p>
  
  <pre><code>function[y_int1, y_int2, Youngs_Modulus, Poissons_Ratio, Youngs_Modulus_Percent_diff, Poissons_Ratio_Percent_diff, RMS1, RMS2]= Lab3_EC(elong1,elong2,elat1,elat2,thick,width,load,N)
  
  
  
  %average longitudinal strain
  avgLongs=((elong1)+(elong2))/2;
  
  
  
  %average lateral strain
  avgLats=((elat1)+(elat2))/2;
  
  
  %Find's the area of the sample
  
  A=thick*width;
  
  
  %Finds the applied stress
  stress=load./A;
  
  
  %declares a variable x1 for Long Strain
  x1=avgLongs;
  
  
  %declares a variable y1 for Applied Stress
  y1=stress;
  
  %Declares variables to compute slope1
  
  x1bar=mean(x1);
  y1bar=mean(y1);
  sxy1=sum(x1.*y1);
  sx1=sum(x1);
  sy1=sum(y1);
  sx1s=sum(x1.*x1);
  sx11s=(sum(x1))^2;
  slope1=(N*sxy1-sx1*sy1)/(N*sx1s-sx11s);
  y_int1=y1bar-slope1*x1bar;
  
  %x points
  xp=linspace(min(x1),max(x1));
  
  % y points
  yp1=slope1*xp+y_int1;
  
  %Declares variables to compute slope 2
  
  %Since our second calculation of linear regression uses Average
  %Longitudinal Stress we can re-use the variable x1 
  
  y2=abs(avgLats);
  y2bar=mean(y2);
  sxy2=sum(x1.*y2);
  sy2=sum(y2);
  slope2=(N*sxy2-sx1*sy2)/(N*sx1s-sx11s);
  y_int2=y2bar-slope2*x1bar;
  
  
  %y points
  yp2=slope2*xp+y_int2;
  
  
  %preallocate space for error1 vector
  Error1=zeros(N,1);
  
  %compute error1
  for i=1:N;
     Error1(i)= (stress(i)-y_int1-slope1*avgLongs(i))^2;
  end
  Error1=sum(Error1(5));   
  
  %preallocate space for error2 vector
  
  Error2=zeros(N,1);
  for i=1:N;
      Error2(i)=(abs(avgLats(i))-y_int2-slope2*avgLongs(i))^2;
  end
  Error2=sum(Error2(5));
  
  RMS1=sqrt(Error1/N);
  
  RMS2=sqrt(Error2/N);
  
  
  Lab_2_E=(stress(5)-stress(1))/(avgLongs(5)-avgLongs(1));
  Lab_2_v=(abs(avgLats(5)-avgLats(1))/(avgLongs(5)-avgLongs(1)));
  Youngs_Modulus=slope1;
  Poissons_Ratio=slope2;
  Youngs_Modulus_Percent_diff=((abs(Youngs_Modulus-Lab_2_E))/Lab_2_E)*100;
  Poissons_Ratio_Percent_diff=((abs(Poissons_Ratio-Lab_2_v))/Lab_2_v)*100;
  
  
  
  %Plot stress strain diagram and poisson's ratio
  figure(1), plot(avgLongs,stress,'k',x1,y1,'o',xp,yp1,':g'),hold on,...
      xlabel('Long Strain(in/in)'),ylabel('Stress(psi)'),...
      title('Stress vs. Long Strain'), legend('Exp','data points','Calc',...
      'Location','SouthEast')
  figure(2),plot(avgLongs,abs(avgLats),x1,y2,'+',xp,yp2,'-- m'),hold on,...
      xlabel('Long Strain(in/in)'),ylabel('Lat Strain(in/in)'),...
      title('Poisson''s Ratio'),legend('Exp','data points','Calc',...
      'Location','SouthEast')
  </code></pre>