deletions | additions       diff --git a/panel_test.html b/panel_test.html  index 284fcaa..2f48f18 100644  --- a/panel_test.html  +++ b/panel_test.html 
...
               
...
               
...
svg_width = nCols*plot_size + padding;    var tickSize = 16,  brushCell; brushCell,  color_scale = d3.scale.linear();    // Define an object to contain the domains (in data space) for each column  var domainByDataColumn = {}, 
...
xAxis.tickSize(tickSize);  yAxis.tickSize(tickSize);    if (typeof state['colorAxis'] != 'undefined') {  console.log(state['colorAxis']);  color_scale.domain(domainByDataColumn[state['colorAxis']]);  color_scale.range(["red","green","blue"]);  color_scale(-1.0);  }  // TODO: needs better names, brain dumping...  var d = [];  for (var ii=0; ii < state['plots'].length; ii++) { 
...
function plot(p) {  var cell = d3.select(this);    /* need to do something fancy for histogram here?  if (domainByDataColumn[p.xColumnName].length > 2) {  // e.g., ordinal domain  xScaler = xOrdinalScaler;  xScaler.domain(domainByDataColumn[p.xColumnName]);  } else {  xScaler.domain(domainByDataColumn[p.xColumnName]);  }  */  xScaler.domain(domainByDataColumn[p.xColumnName]);  yScaler.domain(domainByDataColumn[p.yColumnName]);   
...
.attr("cx", function(d) { return xScaler(d[p.xColumnName]); })  .attr("cy", function(d) { return yScaler(d[p.yColumnName]); })  .attr("r", 2)  .style("fill", function(d) { return color_scale(d[state['colorAxis']]) ||  "#333333"; });// TODO: COLOR STUFF HERE  }  }    diff --git a/states.json b/states.json  index 0a31b24..4d5aa58 100644  --- a/states.json  +++ b/states.json 
...
{   "gridPosition" : [0,3],  "xAxis" : "J-H",  "yAxis" : "J-H" "[Fe/H]"  }  ] ],  "colorAxis" : "[Fe/H]"  },  {  "grid" : { "nRows" : 1,