Sorry kind of a beginners question again. Suppose I have a large GroupDataFrame and I would like to add columns to each SubDataFrame in the Group. function build(GDF) for k = eachindex(GDF) GDF[k].newcol1 = function1(GDF[k].col1) GDF[k].newcol2 = function2(GDF[k].col2) end Is there a…

[image] phantom: function build(GDF) for k = eachindex(GDF) GDF[k].newcol1 = function1(GDF[k].col1) GDF[k].newcol2 = function2(GDF[k].col2) end A standard way to write it would be: transform!(gdf, :col1 => function1 => :newcol1, :col2 => function2 => :newcol2) and this should b…

Most efficient way to add new columns in each SubDataFrame of a GroupDataFrame

General Usage Performance

phantom October 27, 2022, 2:08am 7

Thanks the explanation and blog post is really helpful! looking forward to the hardcopy of your book in December!

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Most efficient way to add new columns in each SubDataFrame of a GroupDataFrame

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