Making a CSV file into an RData file
https://stackoverflow.com//questions/25038900
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Please bear with an R newbie here. I'm trying to follow along with a tutorial published on the wonderful flowingdata.com site by using my own data to replace the .Rdata file included in the tutorial. The Rdata file, "unisexCnts.RData", contains unisex names and the number of times used for different years:
head(unisexCnts)
1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951
Addison 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Alexis 0 0 0 0 0 0 0 0 0 0 0 12 0 0 0 0 0 0 0 0 0 0
Ali 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Alva 0 0 312 273 274 263 0 273 0 255 235 195 222 0 195 0 193 225 204 196 177 156
Amari 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Angel 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973
Addison 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Alexis 0 0 0 0 0 0 0 0 0 0 0 0 190 0 0 325 0 0 0 0 0 0
Ali 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 243 219 214
Alva 177 132 159 178 145 138 131 119 119 119 127 97 107 97 83 76 83 90 84 81 58 68
Amari 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Angel 0 0 0 0 0 0 0 0 0 1264 0 0 0 0 0 0 0 1579 2145 2488 0 0
1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995
Addison 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 595 664
Alexis 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ali 0 0 0 0 0 0 0 0 0 0 0 0 561 565 556 643 747 722 0 742 0 0
Alva 54 57 53 54 59 40 62 0 48 0 28 0 34 0 0 0 0 0 0 0 0 26
Amari 0 0 0 0 0 0 11 0 0 0 0 0 16 0 22 0 32 0 0 0 0 0
Angel 2561 2690 2779 0 0 3004 3108 3113 3187 2924 3100 3341 3229 3101 3532 3889 4066 4520 0 0 0 0
1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Addison 778 889 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Alexis 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Ali 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Alva 0 0 0 19 0 14 0 0 0 0 0 24 0 0 0 0 0
Amari 0 0 0 0 0 0 1181 1397 1333 1299 1265 1550 1780 0 0 0 0
Angel 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
When I run it through the str() function I get the follwoing:
str(unisexCnts)
num [1:121, 1:83] 0 0 0 0 0 0 16 0 0 0 ...
- attr(*, "dimnames")=List of 2
..$ : chr [1:121] "Addison" "Alexis" "Ali" "Alva" ...
..$ : chr [1:83] "1930" "1931" "1932" "1933" ...
My data is in a csv file ,called "boysnames.csv":
,2013,2012,2011,2010,2009,2008
Jack,764,831,840,935,1068,1151
James,746,773,796,746,711,737
Daniel,678,683,711,792,842,828
Conor,610,639,709,726,776,857
I am trying to overwrite the unisexCnts.RData with the contents of my boysnames.csv. So to restructure and get my csv ready to be saved, I did:
Step1.
unisexCnts<-data <- read.csv("boysnames.csv", stringsAsFactors=FALSE, header=TRUE, check.names = FALSE)
Step2.
unisexCnts<-as.matrix(unisexCnts)
Step3.
save(file="unisexCnts.RData") ##save as Rdata file, overwriting the original unisexCnts.RData in the dir
However I get the following after steps 1 & 2 which doesn't match the structure of the original, any ideas/pointers?
> str(unisexCnts)
chr [1:100, 1:7] "Jack" "James" "Daniel" "Conor" "Sean" "Adam" "Ryan" "Michael" "Harry" "Noah" ...
- attr(*, "dimnames")=List of 2
..$ : NULL
..$ : chr [1:7] "" "2013" "2012" "2011" ...
Solution
When you load a .csv file you can specify the column that should become the row names of the uploaded data using the command "row.names"
I recreated your data quickly and uploaded it using the following code:
read.csv('test.csv', stringsAsFactors = F,head = T, row.names = 1)
This saves you having to do this work after uploading the data. This gives you the data structure you are looking for as well:
unisexCnts = read.csv('test.csv', stringsAsFactors = F,head = T, row.names = 1)
unisexCnts = as.matrix(unisexCnts)
str(unisexCnts)
int [1:4, 1:6] 764 746 678 610 831 773 683 639 840 796 ...
- attr(*, "dimnames")=List of 2
..$ : chr [1:4] "Jack" "James" "Dan" "Conor"
..$ : chr [1:6] "X2013" "X2012" "X2011" "X2010" ...
OTHER TIPS
However I get the following after steps 1 & 2 which doesn't match the structure of the original, any ideas/pointers?
In the original unisexCnts the names are specified as row names. That's why the the first attribute is
..$ : chr [1:121] "Addison" "Alexis" "Ali" "Alva" ...
To replicate that in your example. You can set the names as rownames by specifying
rownames(unisexCnts) <- ListorOrVectorofNamesHere
This will make the output match.
The reason this line:
chr [1:100, 1:7] "Jack" "James" "Daniel" "Conor" "Sean" "Adam" "Ryan" "Michael" "Harry" "Noah" ...
doens't match this line
num [1:121, 1:83] 0 0 0 0 0 0 16 0 0 0 ...
is the same. You have the names included in the actual matrix itself. In a matrix you can only have data of the same type . By including character data in the matrix (the names) you are converting the whole matrix itself into character/strings.
in summary
remove the name vector from the matrix and use it as row names and the str() of your two objects will match.
