我对R包学者有个问题
什么工作:
get_citation_history(SSalzberg)什么没有:
get_article_cite_history(SSalzberg, "any article")码
article <- "Ultrafast and memory-efficient alignment of short DNA sequences to the human genome"
SSalzberg <- "sUVeH-4AAAAJ" (Google Scholar ID)
get_article_cite_history(SSalzberg, article)错误消息:
Error in min(years):max(years) : result would be too long a vector
In addition: Warning messages:
1: In min(years) : no non-missing arguments to min; returning Inf
2: In max(years) : no non-missing arguments to max; returning -Inf我不理解这个函数中的错误信息,我和另一个作者尝试了另一篇论文,但没有成功。我不知道我在这里错过了什么..。谢谢
发布于 2015-11-06 15:49:30
您必须使用文章ID,而不是文章的标题。可能最简单的方法是检索完整的酒吧列表,其中有一个pubid列.
library(scholar)
SSalzberg <- "sUVeH-4AAAAJ"
all_pubs <- get_publications(SSalzberg)
## next step is cosmetic -- the equivalent of stringsAsFactors=FALSE
all_pubs <- as.data.frame(lapply(all_pubs,
function(x) if (is.factor(x)) as.character(x) else x))
w <-grep("Ultrafast",all_pubs$title) ## publication number 3
all_pubs$title[w]
## [1] Ultrafast and memory-efficient alignment of ...
all_pubs$pubid[w] ## "Tyk-4Ss8FVUC"
ch <- get_article_cite_history(SSalzberg,all_pubs$pubid[w])
plot(cites~year,ch,type="b")https://stackoverflow.com/questions/33570390
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