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Brandon Martin-Anderson bmander

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bmander / negicurrents.ipynb
Last active February 12, 2016 20:07
How to find negative currents between two fully connected layers
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@bmander
bmander / digamma.diff
Created February 1, 2016 15:39
implement digamma function
diff --git a/tensorflow/python/ops/math_grad.py b/tensorflow/python/ops/math_grad.py
index 9e255c2..58338d1 100644
--- a/tensorflow/python/ops/math_grad.py
+++ b/tensorflow/python/ops/math_grad.py
@@ -266,7 +266,15 @@ def _ErfcGrad(op, grad):
@ops.RegisterGradient("Lgamma")
def _LgammaGrad(op, grad): # pylint: disable=unused-argument
# TODO(ebrevdo): implement digamma
- raise NotImplementedError("grad(Lgamma) == Digamma is not implemented")
+
@bmander
bmander / squishwords.py
Created June 5, 2014 19:59
A silly little script for translating documents to a compressed invented language.
# language corpus here: http://www.kilgarriff.co.uk/BNClists/all.al.gz
# a tale of two cities here: http://www.gutenberg.org/cache/epub/98/pg98.txt
import math
import re
codes = {}
codelens = {}
def baseN(num,b,numerals="abcdefghijklmnopqrstuvwxyz"):
@bmander
bmander / digest_cuts.py
Created April 16, 2014 00:27
A one-off script for digesting the King County service cut spreadsheet into something that the refreq utility can use.
import csv
AM_PEAK_LEN=3.0 #hours, 6am-9am
PM_PEAK_LEN=3.0 #hours 3pm-6pm
ROUTE_ROW=0
CUR_TRIP_PEAK_AM=3
CUR_TRIP_PEAK_PM=4
PROP_TRIP_PEAK_AM=5
PROP_TRIP_PEAK_PM=6
@bmander
bmander / globalmaptiles.py
Created August 18, 2013 22:37 — forked from anonymous/globalmaptiles.py
#!/usr/bin/env python
###############################################################################
# $Id$
#
# Project: GDAL2Tiles, Google Summer of Code 2007 & 2008
# Global Map Tiles Classes
# Purpose: Convert a raster into TMS tiles, create KML SuperOverlay EPSG:4326,
# generate a simple HTML viewers based on Google Maps and OpenLayers
# Author: Klokan Petr Pridal, klokan at klokan dot cz
# Web: http://www.klokan.cz/projects/gdal2tiles/
@bmander
bmander / poll_nextbus.js
Created August 16, 2013 04:31
Poll the nextbus api and log entries into a mongodb database
var http = require('http');
var xml2js = require('xml2js');
var mongodb = require('mongodb')
// get mongdb handle
var db = new mongodb.Db('test', new mongodb.Server("127.0.0.1", 27017, {}))
// keep track of the last time we got a response from nextbus
var lastTime = 0;
@bmander
bmander / onionvoices.py
Created August 12, 2013 23:17
A scraper what fetches The Onion's American Voices names and occupations.
from urllib2 import urlopen
from bs4 import BeautifulSoup
import time
def get_voice_details( soup, i ):
resptag = soup.find_all("li", class_="response-%d"%i)[0]
name, br, occupation = resptag("p",class_="occupation")[0].contents
name = " ".join( name.split()[:-1] )#last word is a dash
occupation = occupation.strip()
@bmander
bmander / 3dgps.py
Created July 31, 2013 18:54
Show GPS track in 3d
import csv
import dateutil.parser
import calendar
#track 100 has a lot of nice pauses
#TRACK = 2000 #defines a box!
TRACK = 100 #defines a box!
rd = csv.reader( open("points.csv") )
@bmander
bmander / targpxtocsv.py
Created July 31, 2013 18:40
Digest a tarfile full of GPX files into a more manageable CSV file
import lzma
from xml.dom.minidom import parseString, parse
import dateutil.parser
import calendar
from pyproj import Geod
import tarfile
from xml.parsers import expat
def parse_trkpt( node ):
lat = float(node.getAttribute("lat"))
@bmander
bmander / dotmap.pde
Created December 27, 2012 04:26
Generate dotmap tiles
/* I, Brandon Martin-Anderson, release this into the public domain or whatever. */
BufferedReader reader;
double ll, bb, rr, tt;
float A = 1000.0;
GlobalMercator proj = new GlobalMercator();