求助：自己在测算经济权重矩阵的时候，显示存在某行加总为0，无法实现标准化的情况，该如何解决，如何调整。
感谢大家的帮助！！

spwmatrix gecon latitude longitude, wname(wecon1) wtype(econ) econvar(mr1addvalue) row xpor
> t(wecon1,txt)

N.B.: Elements of one row of the weights matrix sum up to zero; weights matrix was not row-st
> andardized

This row is:
  3
You might want to rethink your weights structure criteria.
An alternative is to specify the noisland option to generate the spatial weights without the
> island observation:

Economic distance spatial weights matrix (30 x 30) calculated successfully and the following
> action(s) taken:

- Spatial weights matrix  created as Stata object(s): wecon1.

- Spatial weights matrix saved to .txt file, F:\Stata15.0/wecon1.txt, for use with other Sta
> ta packages.