R mlogit on my data giving error 'system is computationally singular?

问题

Could anyone explains what is the error and how could I resolve it?

> C.m<-mlogit(choice~TotalAmount,data=C)

Error in solve.default(H, g[!fixed]) : 
  system is computationally singular: reciprocal condition number = 6.87101e-23

回答1:

Something in your data is computationally singular e.g. some of the columns you are trying to do the regression on are correlated. Maybe you can remove some of the correlated columns and try again without them.

来源：https://stackoverflow.com/questions/18978572/r-mlogit-on-my-data-giving-error-system-is-computationally-singular