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rcsvimportread.csvsdmx

Reading oddly formatter CSV file


I'm looking at downloading some data from the statistics.gov.scot website. For example, I would like to source some data on the rates of hospital admissions. The query to source the data table I'm interested in is of format:

http://statistics.gov.scot/slice/observations.csv?&dataset=http%3A%2F%2Fstatistics.gov.scot%2Fdata%2Freconvictions&http%3A%2F%2Fpurl.org%2Flinked-data%2Fcube%23measureType=http%3A%2F%2Fstatistics.gov.scot%2Fdef%2Fmeasure-properties%2Fratio&http%3A%2F%2Fstatistics.gov.scot%2Fdef%2Fdimension%2Fage=http%3A%2F%2Fstatistics.gov.scot%2Fdef%2Fconcept%2Fage%2Fall&http%3A%2F%2Fstatistics.gov.scot%2Fdef%2Fdimension%2Fgender=http%3A%2F%2Fstatistics.gov.scot%2Fdef%2Fconcept%2Fgender%2Fall

and be accessed via this link, for those who want to try. The query generates a *.CSV file with the relevant information, however, the format of the file poses some challenges.

File example

The file content looks like that:

Generated by http://statistics.gov.scot,2016-03-15T10:41:28+00:00
http://statistics.gov.scot/data/hospital-admissions,Hospital Admissions
measure type,""
Admission Type,""
Age,""
Gender,""
Measure (cell values): ,"Ratio (Rate Per 100,000 Population)"

,,http://reference.data.gov.uk/id/year/2002,http://reference.data.gov.uk/id/year/2003,http://reference.data.gov.uk/id/year/2004,http://reference.data.gov.uk/id/year/2005,http://reference.data.gov.uk/id/year/2006,http://reference.data.gov.uk/id/year/2007,http://reference.data.gov.uk/id/year/2008,http://reference.data.gov.uk/id/year/2009,http://reference.data.gov.uk/id/year/2010,http://reference.data.gov.uk/id/year/2011,http://reference.data.gov.uk/id/year/2012
http://purl.org/linked-data/sdmx/2009/dimension#refArea,Reference Area,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012
http://statistics.gov.scot/id/statistical-geography/S92000003,Scotland,"9,351","9,262","9,261","9,347","9,723","10,517","10,293","10,150","10,024","10,232","10,194"

when imported to Excel:

Excel import

However, when imported to R via the read.csv it looks like that:

> head(problematicFile)
                                                   V1                        V2
1             Generated by http://statistics.gov.scot 2016-03-15T10:36:29+00:00
2 http://statistics.gov.scot/data/hospital-admissions       Hospital Admissions
3                                        measure type                          
4                                      Admission Type                          
5                                                 Age                          
6                                              Gender  

Problem

The read.csv import returns only two columns. I'm guessing that the problem relates to some of the initial columns being empty. I want to read this file in a manner similar to the illustrated import achieved in Excel. The point is that, I intend to use vales from the row 7 in columns A and B and, naturally, the data table below. In terms of generating the data.frame I would be happy to contain NA values where there are empty cells but to be of the dimensions equivalent to those in Excel. I tried:

read.csv(file = link, header = FALSE, na.strings = "",
                               fill = TRUE)

but I keep on arriving at the same problem.

Desired results

The desired results should look like that (extract generated by hand):

Generated by http://statistics.gov.scot 2016-03-15T10:41:28+00:00   NA  NA  NA  NA  NA  NA  NA
http://statistics.gov.scot/data/hospital-admissions Hospital Admissions NA  NA  NA  NA  NA  NA  NA
measure type    NA  NA  NA  NA  NA  NA  NA  NA
Admission Type  NA  NA  NA  NA  NA  NA  NA  NA
Age NA  NA  NA  NA  NA  NA  NA  NA
Gender  NA  NA  NA  NA  NA  NA  NA  NA
Measure (cell values):  Ratio (Rate Per 100,000 Population)         NA  NA  NA  NA  NA
NA  NA  NA  NA  NA  NA  NA  NA  NA
NA  NA  http://reference.data.gov.uk/id/year/2002   http://reference.data.gov.uk/id/year/2003   http://reference.data.gov.uk/id/year/2004   http://reference.data.gov.uk/id/year/2005   http://reference.data.gov.uk/id/year/2006   http://reference.data.gov.uk/id/year/2007   http://reference.data.gov.uk/id/year/2008
http://purl.org/linked-data/sdmx/2009/dimension#refArea Reference Area  2002    2003    2004    2005    2006    2007    2008
http://statistics.gov.scot/id/statistical-geography/S92000003   Scotland    9,351   9,262   9,261   9,347   9,723   10,517  10,293
http://statistics.gov.scot/id/statistical-geography/S16000082   Angus South 8,236   8,500   8,523   8,371   8,616   8,978   9,325
http://statistics.gov.scot/id/statistical-geography/S16000106   Edinburgh Northern and Leith    9,040   8,040   7,925   9,042   10,355  11,833  8,916
http://statistics.gov.scot/id/statistical-geography/S16000140   Renfrewshire South  9,391   9,122   9,491   9,586   10,425  10,900  11,065
http://statistics.gov.scot/id/statistical-geography/S16000108   Edinburgh Southern  5,878   5,910   6,101   6,035   7,426   9,343   6,766
http://statistics.gov.scot/id/statistical-geography/S16000075   Aberdeen Donside    10,047  10,963  10,629  10,512  10,383  10,787  10,685
http://statistics.gov.scot/id/statistical-geography/S16000137   Perthshire North    9,388   9,524   7,799   9,350   9,543   9,791   9,991
http://statistics.gov.scot/id/statistical-geography/S16000077   Aberdeenshire East  7,211   7,300   7,153   7,411   7,435   7,268   7,547
http://statistics.gov.scot/id/statistical-geography/S16000114   Galloway and West Dumfries  9,861   9,165   8,143   9,258   7,508   10,213  10,399
http://statistics.gov.scot/id/statistical-geography/S16000096   Dumbarton   8,703   8,570   8,727   9,310   9,389   9,885   10,237

Screenshot

Just to illustrate further, I want to maintain the dimensions and populate missing values with NAs:

Excel with NAs


Solution

  • Parsing the metadata from the headers is a bit tricky. You might prefer to download the whole normalised dataset instead of that cross-tabulated slice.

    > reconv <- read.csv("http://statistics.gov.scot/downloads/cube-table?uri=http%3A%2F%2Fstatistics.gov.scot%2Fdata%2Freconvictions")
    
    > head(reconv)
    
      GeographyCode DateCode Measurement                              Units Value Gender Age
    1     S92000003     2003        Mean Average reconvictions per offender  0.62    All All
    2     S92000003     2004        Mean Average reconvictions per offender  0.33    All All
    3     S92000003     2004        Mean Average reconvictions per offender  0.61    All All
    4     S92000003     2005        Mean Average reconvictions per offender  0.60    All All
    5     S92000003     2006        Mean Average reconvictions per offender  0.60    All All
    6     S92000003     2007        Mean Average reconvictions per offender  0.11    All All
    

    This will put all of the metadata in factor levels (so you don't have to parse it):

    > str(reconv)
    
    'data.frame':   10119 obs. of  7 variables:
     $ GeographyCode: Factor w/ 26 levels "S12000005","S12000006",..: 26 26 26 26 26 26 26 26 26 26 ...
     $ DateCode     : int  2003 2004 2004 2005 2006 2007 2007 2008 2008 2009 ...
     $ Measurement  : Factor w/ 2 levels "Mean","Ratio": 1 1 1 1 1 1 1 1 1 1 ...
     $ Units        : Factor w/ 2 levels "Average reconvictions per offender",..: 1 1 1 1 1 1 1 1 1 1 ...
     $ Value        : num  0.62 0.33 0.61 0.6 0.6 0.11 0.57 0.6 0.33 0.33 ...
     $ Gender       : Factor w/ 3 levels "All","Female",..: 1 1 1 1 1 1 1 1 1 1 ...
     $ Age          : Factor w/ 6 levels "21-25","26-30",..: 4 4 4 4 4 4 4 4 4 4 ...
    

    You can select the slice you're interested in:

    > slice <- subset(reconv, Measurement=="Ratio" & Gender=="All" & Age=="All")
    

    And get back to the original cross-tabulated slice if you want:

    > library(reshape2)
    > dcast(slice, GeographyCode ~ DateCode, value.var="Value", fun.aggregate = first)
    
       GeographyCode 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
    1      S12000005 41.4 34.3 41.0 40.7 37.4 37.2 33.3 34.6 35.8 33.0 32.8
    2      S12000006 34.9 36.0 31.9 34.2 31.1 28.7 27.9 29.6 27.5 26.8 27.0
    3      S12000008 33.7 33.2 33.7 33.2 31.7 32.8 30.4 31.5 29.1 28.1 28.7
    4      S12000010 26.7 24.5 25.7 26.9 26.7 27.8 29.3 25.1 22.4 29.0 28.2
    5      S12000013 31.7 26.1 30.6 35.4 31.6 25.9 24.0 18.9 30.5 22.8 18.6
    ...