Based off of: canvas page
possible fish w/ outliers wrt LENGTH fish length > 1600x` fish either SUM or LIM?
Manipulating Rows
Use pipe filters like so %>% :
ddt %>% filter(skin_color == "light", eye_color == "brown")to get rows we can:
ddt %>% slice(5:10)
ddt %>% slice_head(n = 3)
# We can also use slice_tail in the similar manner to get first/last rows
ddt %>% filter(!is.na(height)) %>% slice_max(height, n = 3)#we can also do min, n=# to grabRandom rows:
ddt %>% slice_sample(n = 5,replace = TRUE)#n=# chose, replace = can appear more than once
ddt %>% slice_sample(prop = 0.1,weight=5,)#prop=proportion, weight=sample weightsNow we want to find how many are outliers wrt.
#How many fish are categorized as outliers based solely on their LENGTH?
df = ddt %>% mutate(z=scale(ddt$LENGTH)[,])
sum(abs(df$z) > 3 )
#How many CCATFISH are outliers with respect to DDT?
df <- ddt %>% filter(SPECIES == "CCATFISH") %>% mutate(z = scale(DDT))
sum(abs(df$z) > 3)See also: