Commits on Jun 20, 2022

1. Heatmap to color cells even when all the values are the same …

   Currently when the table only plots one possible value (e.g., table of
   NULL and 1), the cells with a value have no color. I thought this is
   counterintuitive, so I tried a custom heatmap using the weather example.
   Indeed, using Plotly as below I can get the same heatmap as now, but
   when my table only has a single possible value I can still tell the
   cells with values from those with no value because they are white.
   
   ```
       rendererOptions: {
           heatmap: {
               colorScaleGenerator: function(values) {
                   var min, max;
                   min = Math.min.apply(Math, values);
                   max = Math.max.apply(Math, values);
                   return Plotly.d3.scale.linear()
                       .domain([min, max])
                       .range(["white", "red"])
                   ;
               }
           }
       },
   
   ```

   

   chutzimir committed Jun 20, 2022
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