Dear all,
     What is the usage of the ".Call()"?
What is the meaning of the follows:
    S=.Call("RS_fractal_spectral_density_function_direct",x,as.vector(taper.),as.logical(center),as.logical(recenter),TRUE,as.integer(npad),COPY=rep(FALSE,6),CLASSES=c(rep("matrix",2),rep("logical",3),"integer"),PACKAGE="ifultools")
 
And is a function of "RS_fractal_spectral_density_function_direct"?
Can I get the detail of "RS_fractal_spectral_density_function_direct"?
Thanks a lot!
 
Best regards,
Wang


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