会不会是你的 Stata 没装好？

额 不会吧？装的是stata15 SE

1. 尔后请用回复。2. 请试试看看有无下图出现？

谢谢啦，论坛逛的不多，用的不熟。
还是不行诶，运行后的情况如下。


. webuse grunfeld, clear

.
. xtset company year
       panel variable:  company (strongly balanced)
        time variable:  year, 1935 to 1954
                delta:  1 year

.
. xtline invest
alignstroke.new,: class member function not found
(error occurred while loading linestyle.class)
linestyle.new: class member function not found
(error occurred while loading areastyle.class)
areastyle.new: class member function not found
(error occurred while loading plotregionstyle.class)
plotregionstyle.new: class member function not found
(error occurred while loading bygraphstyle.class)
bygraphstyle: class type not found
(error occurred while loading bygraph_g.class)
bygraph_g.new: class member function not found
r(4023);

谢谢啦，论坛逛的不多，用的不熟。
还是不行诶，运行后的情况如下。


. webuse grunfeld, clear

.
. xtset company year
       panel variable:  company (strongly balanced)
        time variable:  year, 1935 to 1954
                delta:  1 year

.
. xtline invest
alignstroke.new,: class member function not found
(error occurred while loading linestyle.class)
linestyle.new: class member function not found
(error occurred while loading areastyle.class)
areastyle.new: class member function not found
(error occurred while loading plotregionstyle.class)
plotregionstyle.new: class member function not found
(error occurred while loading bygraphstyle.class)
bygraphstyle: class type not found
(error occurred while loading bygraph_g.class)
bygraph_g.new: class member function not found
r(4023);