How to write haml code for corresponding javascript? - sinatra

Question

Here is the haml that i have created out of html. But it doesn't seem to give any output. Please help me to find out the error. May be I am going somewhere wrong with the syntax or not getting what to put in the index section of haml.
#!/usr/bin/env ruby
require 'rubygems'
require 'sinatra'
require 'haml'
get '/' do
haml :index
end
__END__
## layout
%html
%head
%meta{:charset => "utf-8"}/
:css
body {
font: 10px sans-serif;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
.x.axis path {
display: none;
}
.line {
fill: none;
stroke: steelblue;
stroke-width: 1.5px;
}
%body
%script{:src => "http://d3js.org/d3.v3.js"}
:javascript
var margin = {top: 20, right: 80, bottom: 30, left: 50},
width = 960 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom;
var x = d3.scale.linear()
.range([0, width]);
var y = d3.scale.linear()
.range([height, 0]);
var color = d3.scale.category10();
var xAxis = d3.svg.axis()
.scale(x)
.orient("bottom");
var yAxis = d3.svg.axis()
.scale(y)
.orient("left");
var line = d3.svg.line()
.interpolate("basis")
.x(function(d) { return x(d.ID); })
.y(function(d) { return y(d.temperature); });
var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
d3.tsv("pckt_thru.tsv", function(error, data) {
color.domain(d3.keys(data[0]).filter(function(key) { return key !== "ID"; }));
data.forEach(function(d) {
d.ID = +d.ID;
});
var cities = color.domain().map(function(name) {
return {
name: name,
values: data.map(function(d) {
return {ID: d.ID, temperature: +d[name]};
})
};
});
x.domain(d3.extent(data, function(d) { return d.ID; }));
y.domain([
d3.min(cities, function(c) { return d3.min(c.values, function(v) { return v.temperature; }); }),
d3.max(cities, function(c) { return d3.max(c.values, function(v) { return v.temperature; }); })
]);
svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxis);
svg.append("g")
.attr("class", "y axis")
.call(yAxis)
.append("text")
.attr("transform", "rotate(-90)")
.attr("y", 6)
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("VALUES");
var city = svg.selectAll(".city")
.data(cities)
.enter().append("g")
.attr("class", "city");
city.append("path")
.attr("class", "line")
.attr("d", function(d) { return line(d.values); })
.style("stroke", function(d) { return color(d.name); });
city.append("text")
.datum(function(d) { return {name: d.name, value: d.values[d.values.length - 1]}; })
.attr("transform", function(d) { return "translate(" + x(d.value.ID) + "," + y(d.value.temperature) + ")"; })
.attr("x", 3)
.attr("dy", ".35em")
.text(function(d) { return d.name; });
});
=yield
## index
#header
%h1 Graph using Sinatra

Answer 1

You're missing all the % signs off the beginning of elements, e.g. html should be %html. See the tutorial. Hope that helps.

Answer 2

If this is the exact source and no typos.
You are missing % on the tags
%html # not html
Your nesting seems to be incorrect
%html
%meta
%body
%html
%head
%meta
%body
Try running your original html/erb through http://html2haml.heroku.com. That might help you get started if you don't know HAML at all.