#load data
doaj <- read.csv("http://www.doaj.org/doaj?func=csv", header = TRUE, sep=",")
#subset social science journals
doaj.soz <- doaj[grep("Social Science",doaj$Subjects),]
#cross-tabulate licence conditions
table(doaj.soz$CC.License)
##
## by by-nc by-nc-nd by-nc-sa BY-NC-SA by-nd by-sa
## 784 153 84 98 25 0 8 3
# percentage
table(doaj.soz$CC.License) / nrow(doaj.soz) * 100
##
## by by-nc by-nc-nd by-nc-sa BY-NC-SA by-nd by-sa
## 67.8788 13.2468 7.2727 8.4848 2.1645 0.0000 0.6926 0.2597