Hi I am suffering from a annoying situation.


In my data set, a variable is like below,
Code:
commend:
tab v1

resutls:
  02 Dec 08 |         20        0.96       68.72
  08 Dec 08 |         24        1.15       73.00
  09 Dec 08 |          1        0.05       73.05  <--------------- (a)
  15 Dec 08 |         15        0.72       77.57
  24 Dec 08 |          4        0.19       81.81
  05 Jan 09 |          9        0.43       86.04  <--------------- (b)
  06 Jan 09 |          5        0.24       86.28
  13 Jan 09 |          7        0.34       88.35
  14 Jan 09 |         10        0.48       88.84
  21 Jan 09 |          8        0.38       92.88
  30 Jan 09 |          4        0.19       93.94
  31 Jan 09 |          1        0.05       93.98
  04 Feb 09 |          7        0.34       95.43
  05 Feb 09 |          2        0.10       95.52  <--------------- (c)
Here, I want to replace the values including "09" at the end of the value to missing value.
What I am saying is that I need to replace the values between (b) and (c) such as 05 Jan 09 and 05 Feb 09 to missing, but I do not want to replace the value of (a), 09 Dec 08, although the (a)'s value also include "09".

Here, how to deal with this situation?

Thank you for your time spent to read this question.