st: Combining value labels, appending

[Jorge Eduardo Pérez Pérez <perez.jorge@ur.edu.co>]

Dear Statalist

Is there a way to combine two value labels into a single one? Suppose
I have two value labels:

label list numbers1

1 One
2 Two
...
15 Fifteen

label list numbers2

16 Sixteen
...
30 Thirty

and I want to combine them into a single value label, numbers

1 One
2 Two
...
30 Thirty

The issue that motivates the previous question is the following: I am
appending two datasets with the same variable, which have a value
label with the same name attached. However, the labels are not the
same because they have different number-label assignments that
overlap, i.e

use data1, clear
label list label1

1 One
2 Two
3 Three

use data2, clear
label list label1

2 Two
3 Three
4 Four

and I want to append the datasets, keep label1 attached to the
original variable and update label1 so it ends like

label list label1

1 One
2 Two
3 Three
4 Four

Of course this should only work if the labels coincide for the numbers
that overlap. Is there a way to do this automatically?

Thank you,

_______________________
Jorge Eduardo Pérez Pérez

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