plotting - field from a structure

I have the following code in which I fill a structure and then try to plot one of the fields of the structure.

returnProfile = struct('totalReturn',{});
j =0;
for i = 16:8:104
    j = j+1;
    returnProfile(j,1) = maLong(i/2,i,i/8,i/4);
    y(j,1) = i;
end
plot(returnProfile(:).totalReturn,y(:,1));

#*The plot doesn't show anything. am not sure why?* y is an array should "returnProfile(:).totalReturn" be an array i dont see any reason why the plot should not work. all elements are generated as:

   y(:,1)

ans =

      16
      24
      32
      40
      48
      56
      64
      72
      80
      88
      96
     104
  >> returnProfile(:).totalReturn

ans =

      1.6862

ans =

     -8.8583

ans =

      3.3551

ans =

     -4.0201

ans =

     -5.0018

ans =

    -25.9340

ans =

     15.1983

ans =

    -10.6162

ans =

     15.5172

ans =

      4.4779

ans =

    -11.4196

ans =

    -23.1088

Answer 1

[Walter Roberson]

plot([returnProfile.totalReturn],y(:,1));