CODEWITHSUNDEEP
julia
ab_732
ab_732

Reputation: 3887

Julia DataFrames error filtering by field

New to Julia here! I am trying to replicate what I read in the DataFrames documentation:

df = DataFrames.DataFrame(A = 1:2:1000, B = repeat(1:10, inner=50), C = 1:500)
df[df.A .> 500, :]

However I can't get over this error:

LoadError: type DataFrame has no field A while loading In[282], in expression starting on line 2

I am using Julia 0.5 and the DataFrames package is the 0.8.5

How do I use this feature?

Upvotes: 0

Views: 108

Answers (2)

Bogumił Kamiński
Bogumił Kamiński

Reputation: 69819

The feature you have problem with is a syntax df.A. It was introduced after DataFrames.jl was migrated to support Julia 1.0, since Julia 1.0 allows for custom implementations of getproperty method.

The syntax df.A is equivalent to df[:A] and it works correctly under current release 0.14.1 of DataFrames.jl.

Upvotes: 2

ab_732
ab_732

Reputation: 3887

Not sure if I am on a wrong version, however I had to tweak my code to the following:

df[df[:A] .> 500, :]

this would filter the DataFrame by rows having A>500

Upvotes: 0

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