title: Error using ./ Matrix dimensions must agree
body: <p>i'm trying to plot this code , with t,x,l variables ...</p>
  
  <p>i'm getting this error "Error using  ./ 
  Matrix dimensions must agree.</p>
  
  <p>Error in Uentitled5 (line 16)
  a=cos(Lambda1.*(x./L));"</p>
  
  <pre><code>t=1:0.5:300;
  x=0:0.1:100;
  L=0:0.3:100;
  Bi=0.01;
  A1=1.0017
  Lambda1=0.0998
  a=cos(Lambda1.*(x./L));
  theta=(A1.*exp(-(Lambda1.^2).*t).*a);
  for i=t
      plot(t,theta,'-') 
      for j=x
          plot (x,theta,'-','green')
      end
      for k=L
          plot (L,theta,'-','red')
      end
  end
  title('Dimensionless Temperature for Plane Wall  ')
  xlim([0 2])
  ylim([0 350])
  xlabel('\Theta(0)')
  ylabel('t(Time in Seconds)')
  </code></pre>