如题求助用SPSS v.20做回归分析,control variable怎样放进去啊？希望有图片演示过程~感谢本人SPSS菜鸟一个~会用的功能不多~

我的SPSS是IBM.SPSS.Statistics.v20-32bit版本，导师要用SPSS分析

YOU NEED TO USE WEEKLY STOCK RETUNS AS DEPENDENT VARIABLE AND CHANGES IN WEEKLY TRADE-WEIGHTED EXCHANGE RATE AND MARKET INDEX (FTSE ALL SHARE) AS INDEPENDENT VARIABLES. Changes in FTSE all Share index work as a control variable for risks other than exchange rate risk.
现在数据都有了。就是不知道怎么输入才是控制变量？！
我点开analysis的regression里面的linear没有所谓的control variable啊~求助