get_article_cite_history -- one citation in future year

[mhscott]

I have found by trial and error that get_article_cite_history fails when there are 0 citations to the article, giving the error message below. I know you're aware of this, so please keep reading after the error message.

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

I have run in to another case where I get the same error when there is one citation to the article having a publication year in the future. Consider the following example

get_article_cite_history("xXHEaAUAAAAJ","Wp0gIr-vW9MC")

There is one citing article, with publication year 2016. Looking at the source code for this function, there is an attempt to read the citation bar chart provided by GS; however, GS reports no bar chart for the citations to this article, thus the error and perhaps no easy fix, although a check and a graceful return from the function would be welcome.

2015 is almost over, so this particular example will fix itself soon :)

Here is another example with two citations, one in 2016 and one with no year. The same error occurs

get_article_cite_history("0pYNftwAAAAJ","M3ejUd6NZC8C")

[mhscott]

@jefferis Can you take a look at this? I'm not good with R-code :(

Here's a 2016-2017 example: get_article_cite_history("iqSI5oQAAAAJ","35N4QoGY0k4C"). There's one citing article with a publication year 2017.