This repository contains the solutions to assignments given in the Coursera R Programming course. This course is just a part of the Data Science Specialization.
Before trying to test the code, you first need to install R on your system.
To clone the repository containing the source, type in the following:
$ git clone https://sokolovic@bitbucket.org/sokolovic/r-programming.gitAfter cloning the repository, you can load the functions into your current R workspace using source(path/to/source.R)
and invoke them.
To run the functions from Assignment 01 I recommend you first set the working directory to the root of the cloned repository.
> setwd("r-programming") # We first set the working directory to the root of the cloned repository> source("assignment01/pollutantmean.R") # Load the function so it can be used
>
> pollutantmean("assignment01/specdata", "sulfate", 1:10)
[1] 4.064
>
> pollutantmean("specdata", "nitrate", 70:72)
[1] 1.706
>
> pollutantmean("specdata", "nitrate", 23)
[1] 1.281> source("assignment01/complete.R") # Load the function so it can be used
>
> complete("specdata", 1)
id nobs
1 1 117
>
> complete("specdata", c(2, 4, 8, 10, 12))
id nobs
1 2 1041
2 4 474
3 8 192
4 10 148
5 12 96
>
> complete("specdata", 30:25)
id nobs
1 30 932
2 29 711
3 28 475
4 27 338
5 26 586
6 25 463
>
> complete("specdata", 3)
id nobs
1 3 243> source("assignment01/corr.R") # Load the function so it can be used
> source("assignment01/complete.R") # Load the complete() function since it's used in the corr()
>
> cr <- corr("specdata", 150)
> head(cr)
[1] -0.01896 -0.14051 -0.04390 -0.06816 -0.12351 -0.07589
> summary(cr)
Min. 1st Qu. Median Mean 3rd Qu. Max.
-0.2110 -0.0500 0.0946 0.1250 0.2680 0.7630
>
> cr <- corr("specdata", 5000)
> summary(cr)
Min. 1st Qu. Median Mean 3rd Qu. Max.
> length(cr)
[1] 0
>
> cr <- corr("specdata")
> summary(cr)
Min. 1st Qu. Median Mean 3rd Qu. Max.
-1.0000 -0.0528 0.1070 0.1370 0.2780 1.0000
> length(cr)
[1] 323To run the functions from Assignment 03 I recommend you first set the working directory to the root of the cloned repository.
> setwd("r-programming") # We first set the working directory to the root of the cloned repository> source("assignment03/best.R") # Load the function so it can be used
>
> best("TX", "heart attack")
[1] "CYPRESS FAIRBANKS MEDICAL CENTER"
>
> best("TX", "heart failure")
[1] "FORT DUNCAN MEDICAL CENTER"
>
> best("MD", "pneumonia")
[1] "GREATER BALTIMORE MEDICAL CENTER"
>
> best("MD", "heart attack")
[1] "JOHNS HOPKINS HOSPITAL, THE"
>
> best("BB", "heart attack")
Error in best("BB", "heart attack") : invalid state
>
> best("NY", "hert attack")
Error in best("NY", "hert attack") : invalid outcome> source("assignment03/rankhospital.R") # Load the function so it can be used
> source("assignment03/best.R") # Load the best() function since it's used in the rankhospital()
>
> rankhospital("TX", "heart failure", 4)
[1] "DETAR HOSPITAL NAVARRO"
>
> rankhospital("MD", "heart attack", "worst")
[1] "HARFORD MEMORIAL HOSPITAL"
>
> rankhospital("MN", "heart attack", 5000)
[1] NA> source("assignment03/rankall.R") # Load the function so it can be used
> head(rankall("heart attack", 20), 10)
hospital state
1 <NA> AK
2 D W MCMILLAN MEMORIAL HOSPITAL AL
3 ARKANSAS METHODIST MEDICAL CENTER AR
4 JOHN C LINCOLN DEER VALLEY HOSPITAL AZ
5 SHERMAN OAKS HOSPITAL CA
6 SKY RIDGE MEDICAL CENTER CO
7 MIDSTATE MEDICAL CENTER CT
8 <NA> DC
9 <NA> DE
10 SOUTH FLORIDA BAPTIST HOSPITAL FL
>
> tail(rankall("pneumonia", "worst"), 3)
hospital state
52 MAYO CLINIC HEALTH SYSTEM - NORTHLAND, INC WI
53 PLATEAU MEDICAL CENTER WV
54 NORTH BIG HORN HOSPITAL DISTRICT WY
>
> tail(rankall("heart failure"), 10)
hospital state
45 WELLMONT HAWKINS COUNTY MEMORIAL HOSPITAL TN
46 FORT DUNCAN MEDICAL CENTER TX
47 VA SALT LAKE CITY HEALTHCARE - GEORGE E. WAHLEN VA MEDICAL CENTER UT
48 SENTARA POTOMAC HOSPITAL VA
49 GOV JUAN F LUIS HOSPITAL & MEDICAL CTR VI
50 SPRINGFIELD HOSPITAL VT
51 HARBORVIEW MEDICAL CENTER WA
52 AURORA ST LUKES MEDICAL CENTER WI
53 FAIRMONT GENERAL HOSPITAL WV
54 CHEYENNE VA MEDICAL CENTER WYCopyright (c) 2015 Kemal Sokolović
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