iaao_Ratio: Standard on Ratio Studies function

In lfpdroubi/appraiseR: R Package For Real Estate Appraisals

Standard on Ratio Studies function

Description

Statiscal anlysis for matching of appraisal and market data. Based on International Association of Assessing Officers' Standard on Ratio Studies Document

Usage

iaao_Ratio(x, ...)

## Default S3 method:
iaao_Ratio(AssessedValue, SalePrice, OutlierTrimming = FALSE)

## S3 method for class 'lm'
iaao_Ratio(object, FUN = "identity", ...)

Arguments

...	further arguments passed to iaao_Ratio.
AssessedValue	vector of assessed values (valores venais ou valores preditos do modelo)
SalePrice	vector of sale prices (preços de mercado ou preços reais do modelo)
OutlierTrimming	boolean for outliers trimming or not
object	An object of class lm.
FUN	function used to transform the response (defaults to identity)

Value

COD, PRD (ratios) and PRB according to IAOO

Examples

library(sf)
zilli_2020 <- st_drop_geometry(zilli_2020)
zilli_2020$PC <- as.numeric(zilli_2020$PC)
fit <- lm(log(VU) ~ log(AP) + log(DABM) + ND + NB + NG + PSN + PC + BRO,
data = zilli_2020[1:190, ], subset = -c(86, 115))

new = zilli_2020[c(191:213, 215:225), ]
fitted <- predict(fit, newdata = new)
iaao_Ratio(exp(fitted), new[, "VU", drop = TRUE])
# Applied to centro_2015 dataset
dados <- st_drop_geometry(centro_2015)
dados$padrao <- as.numeric(dados$padrao)
fit <- lm(log(valor)~area_total + quartos + suites + garagens +
log(dist_b_mar) + I(1/padrao), data = dados, subset = -c(31, 39))
iaao_Ratio(object = fit, FUN = "log")

lfpdroubi/appraiseR documentation built on April 14, 2024, 10:27 p.m.