请教大神们,我用spregdhp命令做空间面板分析,出现下面的结果是什么意思
. spregdhp x1 D E F G H I J, wmfile(D:\data\matrix.dta) nc(31) model(sar) re
Cross Section Weight Matrix = 0
Time Series obs = 12.032258
Sample Size (Number of obs) = 373
(Cross Sections x Time) must be Equal Sample Size
Spatial Cross Section Weight Matrix Dimension not correct
跪求解答