How to remove legends ?

[yormi]

Hi there !

I was just wondering if there is a way to remove the legends ?

Btw, your library is lovely to use. Thanks ! :)

[jwoLondon]

Yes. Simply add an MLegend type with an empty list to the encoding that would otherwise generate a legend. For example,

barChart : Spec
barChart =
    let
        data =
            dataFromColumns []
                << dataColumn "a" (Strings [ "A", "B", "C" ])
                << dataColumn "b" (Numbers [ 28, 55, 43 ])

        enc =
            encoding
                << position X [ PName "a", PmType Ordinal ]
                << position Y [ PName "b", PmType Quantitative ]
                << color [ MName "a", MmType Nominal, MLegend [] ]
    in
    toVegaLite [ data [], mark Bar [], enc [] ]

[yormi]

Lovely ! Thank you for the quick reply !

Is it in the doc ? Otherwise I'd suggest to add it. Personnally, I just found in vega-lite doc:

User can set the legend property of a mark property channel’s field definition to an object to customize legend properties or set legend to null to remove the legend.

and I was a bit confused on how to represent null in elm haha

[jwoLondon]

You are right about it not being obvious in the docs, so I've added this to the next release documentation (under the color function).

In general, where Vega-Lite says null elm-vega uses [] for lists, "" for strings and Nothing for numeric values.

Thanks very much for raising this issue.

[yormi]

Great ! I looked at your commit and was wondering if the following:

In general, where Vega-Lite says null elm-vega uses [] for lists, "" for strings and Nothing for numeric values.

apply to more than the legend and the axis. If yes, I'd suggest to add it in a general section in the beginning.

Thanks again for the tremendous work !