un

3.2.

knitr::opts_chunk$set(echo = TRUE)
df%>%  filter(class == "32")

##                 nas class
## 1   JELENA MIRČETIĆ    32
## 2  NEVENA ŽIVANOVIĆ    32
## 3      VERICA KITIĆ    32
## 4    DEMIROVIĆ JANA    32
## 5   SOFIJA KARAICIĆ    32
## 6       ILIJA PUPIĆ    32
## 7    SOFIJA TANASIĆ    32
## 8      JOVANA BAJIĆ    32
## 9    FILIP ŽIVKOVIĆ    32
## 10  DUNJA STANKOVIĆ    32
## 11     JANA NIKOLIĆ    32

3.4.

knitr::opts_chunk$set(echo = TRUE)
df%>% filter(class == "34")

##                      nas class
## 1         UROŠ PEJAKOVIĆ    34
## 2        ELENA MATIJEVIĆ    34
## 3           UROŠ JOVOVIĆ    34
## 4       OGNJEN TODOROVIĆ    34
## 5        IRIŠ MIJAJLOVIĆ    34
## 6      JANJA VELIMIROVIĆ    34
## 7           JANJA TANJGA    34
## 8        KATARINA PROTIĆ    34
## 9  MILICA ŠUKOVEZ SORGIĆ    34
## 10   SOFIJA VUKOBRATOVIĆ    34

3.6.

knitr::opts_chunk$set(echo = TRUE)
df%>%  filter(class == "36")

##                         nas class
## 1           VUK RADOVANOVIĆ    36
## 2               KOSTA LAZIĆ    36
## 3              ANJA BACOVIĆ    36
## 4           PETAR JOVANOVIĆ    36
## 5             UNA JOVANOVIĆ    36
## 6         MARIJA VUKSANOVIĆ    36
## 7               IVANA TOŠIĆ    36
## 8           NIKOLA ĐORĐEVIĆ    36
## 9               RAŠA IVOVIĆ    36
## 10          IVANA TODOROVIĆ    36
## 11      ANA KOVAČEVIĆ SIMIĆ    36
## 12            RADMILA TRŠIĆ    36
## 13      ATANACKOVIĆ TATJANA    36
## 14           SVETLANA PAJIĆ    36
## 15         IVA GLIGORIJEVIĆ    36
## 16 BILJANA ĐORĐEVIĆ ZEKOVIĆ    36
## 17              DUŠAN VASIĆ    36
## 18            JASMINA CIRIĆ    36
## 19            TAMARA OTOVIĆ    36
## 20          SAVA VASILJEVIĆ    36
## 21              STUDEN LUKA    36
## 22        MARKO PREDRAGOVIĆ    36

Neidentifikovana odeljenja

knitr::opts_chunk$set(echo = TRUE)
df%>% filter(class == "NA" )

## [1] nas   class
## <0 rows> (or 0-length row.names)