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- ---
- title: "Verkefni 3"
- author: "Ketill Guðmundsson og eSPIE"
- date: "28 mars 2017"
- output:
- html_document: default
- ---
- ```{r echo=TRUE, message=FALSE, error=FALSE}
- library(dplyr)
- library(tidyr)
- library(ggplot2)
- library(knitr)
- ```
- ####1a)
- ```{r}
- ke<- read.table("husnaedi_stort.csv",header=TRUE, sep=",", encoding="UTF-8", stringsAsFactors=FALSE)
- dropEign <- list(a="Einbýlishús", b="Íbúðareign", c="Parhús", d="Raðhús")
- ke <- droplevels(subset(ke, teg_eign == dropEign))
- ke = cbind(ke, fermetraverd = ke$nuvirdi / ke$ibm2)
- ```
- ####1b)
- ```{r}
- teg_eign_RIF<-filter(ke, svfn == "2000" | svfn == "4200" | svfn == "7300")
- teg_eign_RIF$svfn <- factor(teg_eign_RIF$svfn)
- levels(teg_eign_RIF$svfn) <- c("Rekjanesbær", "Ísafjörður", "Fjarðabyggð")
- table(teg_eign_RIF$teg_eign, teg_eign_RIF$svfn)
- prop.table(table(teg_eign_RIF$teg_eign, teg_eign_RIF$svfn), 2)*100
- ggplot(teg_eign_RIF,aes(x=teg_eign, fill=teg_eign)) + geom_bar() + facet_grid(~svfn) + labs(fill='Stærð') + xlab('Hverfi') + ylab('Fjöldi') + theme(axis.text.x = element_text(angle=60, hjust=1))
- ```
- ####1c)
- ```{r}
- ke.rvk<-filter(ke, svfn == "0")
- ke.rvk$svfn <- factor(ke.rvk$svfn)
- levels(ke.rvk$svfn) <- c("Rekjavík")
- ke.rvk = within(ke.rvk, {
- ibm2.flokk = ifelse(ibm2 < 50, 'alltof litlar', ifelse(ibm2 < 80, 'litlar', ifelse(ibm2 < 110, 'miðlungs', ifelse(ibm2 < 140, 'stórar', 'svaka stórar'))))
- })
- group_by(ke.rvk, Flokkur=ibm2.flokk, Tegund=teg_eign)%>%
- summarise(Fjöldi=n(),Meðaltal=mean(fermetraverd), Staðalfrávik=sd(fermetraverd))%>%
- kable()
- ```
- Ljóst verður af gögnunum af hugtakið "economics of scale" á vel við um fermetraverð. Því stærra sem hús verður því ódýrari verður hver fermetri.
- ####1d)
- ```{r}
- ke.d<-filter(ke.rvk, matssvaedi == "80" | matssvaedi == "85")
- ```
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