Plotting pragh with iteration

I have a code with iterations and I want to make a graph for each iteration of 2 for loops and all appear in on graph figure ex

cvals = 1200:100:1600; 
bvals = 5:1:20; 
PR=[];
for cidx = 1 : length(cvals) 
  c = cvals(cidx);    
  for bidx = 1 : length(bvals) 
    b = bvals(bidx);
    ....... eqns 
    result{cidx}(bidx) = wnet/qina ;

I wrote this code

plot(PR, result {1,1},'-o', PR, result {1,2},'-o', ...
      PR, result {1,3},'-o', PR, result {1,4},'-o', ...
      PR , result {1,5},'-o')

but if the range of the of the cvals increased , the rest of the graphs wont be shown , ex 1200:100:2000 from 1700 till 2000 the graphs wont be shown until I add them in the plot command

any help

[Walter Roberson]

Duplicates by http://uk.mathworks.com/matlabcentral/answers/245617-plotting-graphs-after-for-loop