I import a dataframe with library rvest and I want to sort it with subset function, import is alright, cause I can print a dataframe. But when I want to sort data from it, I see error object not found. What should I do?
library(rvest)
html_content <- read_html(url("https://ki.ujep.cz/cs/historie/"))
table <- html_table(html_content, header = TRUE)
print(subset(table, subset = `Dosud na UJEP?` == "ANO"))
I have tested function subset for iris dataframe and it works perfectly, so I don’t know what I have to do else
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You should select what table want to select from. Just add table[[2]]
> print(subset(table[[2]], subset = `Dosud na UJEP?` == "ANO"))
# A tibble: 6 × 4
Jméno Od Do `Dosud na UJEP?`
<chr> <int> <chr> <chr>
1 Ing. Mgr. Jiří Barilla 1993 1996 ANO
2 Ing. Mgr. Jiří Barilla, CSc. 2001 2006 ANO
3 Prof. RNDr. Ivo Nezbeda, DrSc. 2006 2008 ANO
4 Doc. RNDr. Viktor Mashkov, DrSc. 2009 2011 ANO
5 prof. RNDr. Stanislav Novák, CSc. 2011 2014 ANO
6 RNDr. Jiří Škvor, Ph.D. 2014 Dosud ANO