beginner's question regarding plotting the start and end points of the lines detected

% Plot beginnings and ends of lines
  plot(xy(1,1),xy(1,2),'.','LineWidth',2,'Color','yellow');
  start(k,1) = xy(1,1);
  start(k,2) = xy(1,2);
  plot(xy(2,1),xy(2,2),'.','LineWidth',2,'Color','red');
  end1(k,1) = xy(2,1);
  end1(k,2) = xy(2,2);
start 
end1

OUtput:

start= 11    80
    54   106
     0     0
     0     0
   132    81
     0     0
     0     0
   110    83
     0     0
     0     0
   117   142
     0     0
    81    78
   115    83
     0     0
     0     0
     0     0
    71    72
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     2    66
    57    99
     0     0
     0     0
     0     0
     0     0
    30   131
     0     0
   216     2
    83   135
     0     0
     0     0
     0     0
    89     2
   183     2
     0     0
    56   207
   100   208
     0     0
     0     0
     0     0
    67   115
     0     0
     0     0
     0     0
     0     0
     0     0
    78    70
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
    17   103
    21    64
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
   169   157
     0     0
   177    82
     0     0
   150    81
     0     0
     0     0
     0     0
     0     0
    25    64
    59    72
     0     0
     0     0
     0     0
    29   199
   192    68
     0     0
     0     0
   134   147
    27    87
     0     0
   158   157
     0     0
     0     0
    53   100
     0     0
    33    77
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
   186    13
     0     0
     0     0
     0     0
     0     0
   100   140
   141   150
     0     0
     0     0
   166   192
     0     0
   200   117
   179   169
     0     0
     0     0
     0     0
     0     0
     0     0
     0     0
   106   102
     0     0
     0     0
     3    17
     0     0
     0     0
    33   124
   145   146
     0     0
     0     0
     0     0
    18    16
    20    82
    22   131
     0     0
     0     0
     0     0
     0     0
   181   106

We need the output to be displayed without zeros.Kindly give lines of code so that the zero values do not appear.

Answer 1

[Walter Roberson]

nonzero_start = start(any(start,2),:);

Answer 2

[Iain]

After doing the plot:

 a = axis;
 a([1 3]) = 1;
 axis(a)

All that does is stop the plot the plot showing x & y values lower than 1.