英文:
Split string variable in Stata
问题
我有一个包含与公司信息相关的报告的唯一ID的数据库。我有一个包含在报告中涉及的公司的变量。例如，对于ID 1，我在公司列中有“公司A”，对于ID 2，我在该列中有“公司A; 公司B，公司C”。
我想要拆分公司变量，并生成与唯一报告中涉及的公司数量相同的行。因此，我想要对ID 2有三个不同的行，每行一个公司，其余变量保持相同。换句话说，我想要有一个面板数据，ID是公司，j变量是报告（对于某些公司可能相同）。
提前感谢。
英文:
I have a database with unique id for reports related with companies information. I have a variable which contains the companies involved in the report. For example, for ID 1, I have in the column companies “Compay A”, for ID 2 I have this column “Company A; Company B, Company C”.
I would like to split the variable companies and generate as many rows as companies involved in unique reports. So, I would like to have for the ID 2 three different rows, one for each, keeping the rest of variables equal. In other words, I would like to have a Panel Data, the ID is the company an the j variable the report (could be the same for some companies).
thanks in advance.
答案1
得分: 1
以下是翻译好的内容：
使用 `dataex` 提供一些示例数据始终是有帮助的。在下面的解决方案中，我已经这样做了。在加载示例数据之后，逐行运行代码以查看发生了什么。
* 由 -dataex- 生成的示例。要获取更多信息，请键入 help dataex
clear
input str3 id str12 companies
"id1" "C-A;C-B;C-C;"
"id2" "C-X;C-Y;C-Z;"
end
* 将字符串拆分为每家公司的一个变量
split companies, parse(";") generate(comp)
* 从宽格式转换为长格式
reshape long comp, i(id)
* 清理变量
drop _j companies
请注意，代码部分没有翻译。
英文:
It is always helpful to provide some example data using dataex. I have done so in the solution to your question below. After you load the example data, run one line at the time to see what is happning.
* Example generated by -dataex-. For more info, type help dataex
clear
input str3 id str12 companies
"id1" "C-A;C-B;C-C;"
"id2" "C-X;C-Y;C-Z;"
end
* Split the string into one var per company
split companies , parse(";") generate(comp)
* Reshape from wide to long
reshape long comp, i(id)
* Clean up variables
drop _j companies
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