Art on Amit Kohli

R Tagosphere!

Sun, 31 Jan 2016 17:41:10 +0000

This post explores the inter-relationships of StackOverflow Tags for R-related questions. So I grabbed all the questions tagged with “r”, took the other topics: in each question and made some network charts that show how often each tag is seen with the other topics:. The point is to see the empirical relationships that develop as people organically describe their problems with R. Full analysis on GitHub, as always.

Chick flicks vs action movies!

Tue, 13 Oct 2015 22:41:44 +0000

I co-wrote this analysis with Laure Belotti to identify the difference between movie scripts for chick flicks and action movies using sentiment analysis, among other stuff. Rather than creating a blog post, we made a freestanding webpage because I wanted to play around w/ bootstrap and make it pretty and stuff.

Anyway, the analysis is here: https://amitkohli.com/movieSentiments/index.html

Leave comments below!

Sentiment analysis on my girlfriend’s text messages

Fri, 11 Sep 2015 13:22:14 +0000

When I told my friends that I wanted to give my girlfriend an infographic of us (centered around a sentimental analysis of our texts) as a gift for our first anniversary, most of them told me that was a terrible idea. Yeah… well… CHALLENGE ACCEPTED!! Without further ado, this is what love looks like:

Chord progressions of 5000 songs!

Sun, 01 Mar 2015 00:00:00 +0000

Update: Full analysis and everything you need at my github https://github.com/datastrategist/Musical-chord-progressions

The Hooktheory.com database contains analyses of over 5000 songs*. These analyses are uploaded by users and allow for all these songs to be analyzed in bulk, as well as individually. One of these ‘all song’ analyses enables users to gather chord progressions on ALL songs (see the analysis file to see how i did it, using the hooktheory API and R). This allowed us to create a Sankey [[Visualization]] of all chord progressions in the Hooktheory database.

Cover images for facebook, google+, whatever

Wed, 12 Nov 2014 00:37:33 +0000

So I guess everybody let’s you upload a “cover picture”…. something that should be beautiful, emblematic of you, deep, thoughtful etc. Well… I found a bunch of my pics that fit the wide format nicely.

Arduino theremin concert

Tue, 11 Nov 2014 00:52:47 +0000

One of the arduino tutorials was for a theremin. With a few modifications I was able to properly express my sophisticated musical abilities.

Enjoy!

Arduino code follows (prolly doesn’t make TOO much sense without the wiring schematic… if there’s interest I’ll put up a picture).

Human armature from d3Network!

Tue, 11 Nov 2014 00:17:06 +0000

So a little bit of R, a little bit of d3Network and boom! Instant interactive html human!

<style>
.link {
stroke: #666;
opacity: 0.4;
stroke-width: 1.5px;
}
.node circle {
stroke: #fff;
opacity: 0.4;
stroke-width: 1.5px;
}
.node:not(:hover) .nodetext {
display: none;
}
text {
font: 7px serif;
opacity: 0.4;
pointer-events: none;
}
</style>

<script src=http://d3js.org/d3.v3.min.js></script>

<script> 
 var links = [ { "source" : 0, "target" : 1, "value" : 300 }, { "source" : 1, "target" : 2, "value" : 50 }, { "source" : 1, "target" : 3, "value" : 50 }, { "source" : 2, "target" : 4, "value" : 20 }, { "source" : 3, "target" : 5, "value" : 20 }, { "source" : 4, "target" : 6, "value" : 1 }, { "source" : 5, "target" : 7, "value" : 1 }, { "source" : 8, "target" : 9, "value" : 50 }, { "source" : 9, "target" : 10, "value" : 20 }, { "source" : 9, "target" : 11, "value" : 20 }, { "source" : 10, "target" : 12, "value" : 10 }, { "source" : 11, "target" : 13, "value" : 10 }, { "source" : 12, "target" : 14, "value" : 5 }, { "source" : 13, "target" : 15, "value" : 5 }, { "source" : 2, "target" : 8, "value" : 50 }, { "source" : 3, "target" : 16, "value" : 50 }, { "source" : 1, "target" : 8, "value" : 50 }, { "source" : 1, "target" : 16, "value" : 50 }, { "source" : 8, "target" : 16, "value" : 50 }, { "source" : 16, "target" : 9, "value" : 50 } ] ; 
 var nodes = [ { "name" : "Head", "group" : 1 }, { "name" : "Sternum", "group" : 1 }, { "name" : "Shoulder.r", "group" : 1 }, { "name" : "Shoulder.l", "group" : 1 }, { "name" : "Elbow.r", "group" : 1 }, { "name" : "Elbow.l", "group" : 1 }, { "name" : "Wrist.r", "group" : 1 }, { "name" : "Wrist.l", "group" : 1 }, { "name" : "rib.r", "group" : 1 }, { "name" : "hip.c", "group" : 1 }, { "name" : "hip.r", "group" : 1 }, { "name" : "hip.l", "group" : 1 }, { "name" : "knee.r", "group" : 1 }, { "name" : "knee.l", "group" : 1 }, { "name" : "ankle.r", "group" : 1 }, { "name" : "ankle.l", "group" : 1 }, { "name" : "rib.l", "group" : 1 } ] ; 
 var width = 900
height = 600;

var color = d3.scale.category20();

var force = d3.layout.force()
.nodes(d3.values(nodes))
.links(links)
.size([width, height])
.linkDistance(50)
.charge(-120)
.on("tick", tick)
.start();

var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);

var link = svg.selectAll(".link")
.data(force.links())
.enter().append("line")
.attr("class", "link")
.style("stroke-width", function(d) { return Math.sqrt(d.value); });

var node = svg.selectAll(".node")
.data(force.nodes())
.enter().append("g")
.attr("class", "node")
.style("fill", function(d) { return color(d.group); })
.style("opacity", 0.4)
.on("mouseover", mouseover)
.on("mouseout", mouseout)
.call(force.drag);

node.append("circle")
.attr("r", 6)

node.append("svg:text")
.attr("class", "nodetext")
.attr("dx", 12)
.attr("dy", ".35em")
.text(function(d) { return d.name });

function tick() {
link
.attr("x1", function(d) { return d.source.x; })
.attr("y1", function(d) { return d.source.y; })
.attr("x2", function(d) { return d.target.x; })
.attr("y2", function(d) { return d.target.y; });

node.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
}

function mouseover() {
d3.select(this).select("circle").transition()
.duration(750)
.attr("r", 16);
d3.select(this).select("text").transition()
.duration(750)
.attr("x", 13)
.style("stroke-width", ".5px")
.style("font", "17.5px serif")
.style("opacity", 1);
}

function mouseout() {
d3.select(this).select("circle").transition()
.duration(750)
.attr("r", 8);
}

</script>

Epic lamp instructable posted

Tue, 04 Nov 2014 21:17:31 +0000

What do you do with a box of 100 slides that you’ve had for 10 years?

BOOM. This is what. Check out the instructable showing the steps!