[R] ls.diag and lsfit very basic question

[MM]

Hello,

Is the "std.dev" component of ls.diag( lsfit(x,y) ) the sample standard
deviation of the residuals of the fit?

I have
  ls.diag(lsfit(xx,yy))$std.dev
different from
  sd(lsfit(xx,yy)$residuals)

where xx and yy are vectors of 5 elements.

Regards,