PBImisc (version 1.0)

apartments: Apartment prices in Warsaw in years 2007-2009

Description

Dataset downloaded from website http://www.oferty.net/. Dataset contains offer and transictional prices for apartments sold in in Warsaw in years 2007-2009.

Usage

data(apartments)

Format

data.frame with 973 obs. and 16 variables

year

data year of the transaction

month

data month of the transaction

surface

apartment area in m2

city

city (all transactions are from Warsaw)

district

district in which the apartment is located, factor with 28 levels

street

steet in which the apartment is located

n.rooms

number of rooms

floor

floor

construction.date

the construction year

type

ownership rights

offer.price

price in the offer

transaction.price

declared price in the transaction

m2.price

price per m2

condition

apartment condition, factor with 5 levels

lat, lon

latitude and longitude coordinates for district center

Source

website http://www.oferty.net/

Details

This and other related dataset you may find here http://www.oferty.net/.

Examples

data(apartments)
library(lattice)
xyplot(m2.price~construction.date|district, apartments, type=c("g","p"))

# 
# apartments2 = na.omit(apartments[,c(13,1,3,5,7,8,9,10,14,15,16)])
# wsp = (bincombinations(10)==1)[-1,]
# params = matrix(0, nrow(wsp), 3)
# for (i in 1:nrow(wsp)) {
# 	  model = lm(m2.price~., data=apartments2[,c(TRUE,wsp[i,])])
#   	params[i,1] = AIC(model, k=log(nrow(apartments2)))
#  	  params[i,2] = model$rank
#  	  params[i,3] = summary(model)$adj.r.squared
# }
# plot(params[,2], params[,3], xlab="no. of regressors", ylab="adj R^2")
#