st: basic question on generating a string variable

[J Bravo <jb34@duke.edu>]

dear all,

i have a data-set with unit- and year- string identifiers - respectively,
clave2str and year2str.

say that i want to create a new year-unit identifier, say clavestr, so
that the first two characters of clavestr give me the year (from year2str)
and the next 5 characters give me the unit (from clave2str)

     | clave2str   year2str |	clavestr
     |------------------|
100. |     1005       97 |	971005
101. |     1005       98 |	981005
102. |     1005       99 |	991005
103. |     1006       80 |	801006
104. |     1006       83 |	831006
     |------------------|
105. |     1006       86 |	861006
106. |     1006       89 |	891006


any advice?

thanks many.

jb

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