How to choose the maximum value in the given matrix ?

i have an matrix like this

 a=[ X        Y         E        D
   4.3066   22.2961    0.9986  123.2685
   15.7457   67.8913    0.9994   90.1652
   32.7280  138.5675    0.9995   77.5434
   43.8239   86.4116    0.9996   57.7962
   75.8042  139.3684    0.9997   46.2094
   86.4146    7.1168    0.9994   93.8715
   87.3463  156.3322    0.9996   57.7359
  122.8100   10.3564    0.9994   92.5002
  127.8734  166.2267    0.9996   71.8534
  131.3343  195.9349    0.9992  100.9225
  151.0350  175.8058    0.9994   91.3843
  158.0552    4.5279    0.9990  111.7377
  163.0025  132.2639    0.9996   70.7833
  163.0269  178.6225    0.9992  100.7665
  168.8449  147.0092    0.9995   83.3636 ];

from this i want to choose smallest 'D' value like this

 small_D=[  X         Y         E         D
          75.8042  139.3684    0.9997   46.2094];

Answer 1

[Mischa Kim]

Arul, you could use

 [M,I] = min(a(:,4));
 small_D = a(I,:);

[Matlab111]

Mischa Kim, Thank you