Tendencia<-function (CoorX, CoorY, Prop1, grado)
{
DatosOrg <- as.data.frame(cbind(CoorX, CoorY, Prop1))
colnames(DatosOrg) <- c("X", "Y", "V1")
if (grado == 1) {
Tendencia1 <- lm(V1 ~ X + Y, DatosOrg)
Salida <- as.matrix(cbind(DatosOrg[, 1], DatosOrg[, 2],
Tendencia1$residuals, Tendencia1$coefficients[1],
Tendencia1$coefficients[2], Tendencia1$coefficients[3]))
return(Salida)
}
if (grado == 2) {
Tendencia1 <- lm(V1 ~ I(X^2) + I(Y^2) + I(X * Y) + X +
Y, DatosOrg)
Salida <- as.matrix(cbind(DatosOrg[, 1], DatosOrg[, 2],
Tendencia1$residuals, Tendencia1$coefficients[1],
Tendencia1$coefficients[5], Tendencia1$coefficients[6],
Tendencia1$coefficients[4], Tendencia1$coefficients[2],
Tendencia1$coefficients[3]))
return(Salida)
}
}
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