How can I do to find the quartiles, by one variable and weighted by another.

[agenorcanal]

Hi,

How can I do to find the quartiles, by one variable and weighted by another.
For example, in the following data, I wanted the quartiles of the amount variable, by code and weighted by the quantity variable.
Input frame date
code               amount                     quantity
1.01                   35867.14                   125
1.01                 5867.05                     1045
1.01                62100.14                       91
1.01                35,000.99                     21
1.02                401.87                       2650
1.02                815.7                       10345

Thanks

[sunny_talwar]

What is the expected output from this data?

[agenorcanal]

Hi Sunny,

To code 1.01: Quartile 0,25 and  Quartile 0,5 and Quartile 0,75 = 5867.05.