[julia-users] Can't use

[Alex Chao]

Hi new Julia user here. I'm running into a super basic problem of not being 
able to call head() or tail() on my dataframe.

Here is the code 

df = DataFrame()
df[:A] = 1:8
df[:B] = ["M", "F", "F", "M", "F", "M", "M", "F"]
df

head(df)

The error I get is this:

`head` has no method matching head(::DataFrame)

while loading In[155], in expression starting on line 1


Any ideas?