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Line 27: + + + + + +
→tidyr Package
1 Sally midterm A <NA> B <NA> <NA>
1 Sally midterm A <NA> B <NA> <NA>
2 Sally final C <NA> C <NA> <NA></nowiki>
2 Sally final C <NA> C <NA> <NA></nowiki>
<source lang="rsplus">
students3 %>%
gather(class, grade, class1:class5, na.rm = TRUE) %>%
print
</source>