This code do not works anymore after julia 1.5.3 update

General Usage
14

The problem cames because that syntax is depredated from a time.

The solution is:

setosa_df = iris[iris[:, :species] .== "setosa", :]

or

setosa_df = iris[iris[!, :species] .== "setosa", :]

You can indicate or iris[:, :species], in that case you are using a copy. Another option is iris[!, :species] if you want to use a view.

Also you can use the new syntax (from 0.21):

setosa_df = filter(:species => ==("setosa"), iris)

it is more different, but it is a bit more readable in my opinion.

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