isomorphisms

require File.expand_path(File.dirname(__FILE__) + '/neo')

require 'pry'
# Greed is a dice game where you roll up to five dice to accumulate
# points.  The following "score" function will be used to calculate the
# score of a single roll of the dice.
#
# A greed roll is scored as follows:
#
# * A set of three ones is 1000 points

isomorphisms

http://math.ucr.edu/home/baez/photon/tensor.htm:

 <blockquote>Both direct sum and tensor product are standard ways of <b>putting together little Hilbert spaces to form big ones.</b> They are used for different purposes. Suppose we have two physical systems.... Roughly speaking, if ... a physical system's ... states are either of A OR of B, its Hilbert space will be [a] direct sum.... If we have a system whose states are states of A AND states of B, its Hilbert space will be [a] tensor product....
<pre>
<b>MEASURE SPACE</b>   disjoint union  Cartesian product
<b>HILBERT SPACE</b>   direct sum      tensor product
</pre>
</blockquote>

isomorphisms

`> sort( round(sapply( split( HX, HX$course_id ), function(x) sum(x$viewed) / sum(x$registered) *100  )), decreasing=T)`
                                 Programming 
                                          77 
                      Mechanical Engineering 
                                          71 
                      Structural Engineering 
                                          68 
                                         E&M 
                                          67 
                            Computer Science 

isomorphisms

s#MITx/2.01x/2013_Spring#Structural Engineering#g
s#MITx/3.091x/2013_Spring#Solid State Chemistry#g 
s#MITx/8.MReV/2013_Summer#Mechanical Engineering#g
s#MITx/8.02x/2013_Spring#E\&M#g
s#MITx/14.73x/2013_Spring#Poverty#g
s#MITx/6.002x/2013_Spring#Circuits \& Electronics#g
s#MITx/3.091x/2012_Fall#Solid State Chemistry#g 
s#MITx/8.MReV/2013_Summer#Mechanical Engineering#g
s#MITx/6.00x/2013_Spring#Programming#g
s#MITx/6.00x/2012_Fall#Programming#g

isomorphisms

set from = "[email protected]"
set realname = "Humility Consulting"


set imap_user = "[email protected]"
set imap_pass = "my password in plaintest"

set folder = "imaps://imap.gmail.com:993"
set spoolfile = "+INBOX"
set postponed = "+[Gmail]/Drafts"

isomorphisms

#print a specific line
li() { sed -n "$1"p ; }

lines() { sed -n "$1,$2"p ; }




#whitespace
ws() { echo -e "\t⋮\t⋮\t⋮" ; }			#could also do this once for each column à la (head -1 | tr -dC , | sed "s/,/\t⋮/g")

isomorphisms

" fun! MySys()
"    return "$1"
" endfun
" set runtimepath=~/.vim_runtime,~/.vim_runtime/after,\$VIMRUNTIME
" source ~/.vim_runtime/vimrc
" helptags ~/.vim_runtime/doc


imap jk <Esc>

isomorphisms

# You're meant to read through this
# configuraton file rather than simply
# copying it to your home directory.
#
# There are some places where you're
# meant to uncomment something if you
# want to use it in your TMUX.
#
# I hope it's readable.
#

isomorphisms

require(microbenchmark)


# ζ is U+3b6 in Ubuntu
ready.set.go.10000000 <- microbenchmark( "ζ <- complex(0); for (j in 1:1e6) ζ <- c(ζ,complex(argument=j/1e6*2*pi,modulus=1) )", "ζ <- complex(1e6); for (j in 1:1e6) ζ[j] <- complex(argument=j/1e6*2*pi, modulus=1)", "ζ <- complex( argument=1:1e6*2*pi, modulus=1 )" )


a<-Sys.time(); ready.set.go.10000000 <- microbenchmark( "ζ <- complex(0); for (j in 1:1e7) ζ <- c(ζ,complex(argument=j/1e7*2*pi,modulus=1) )", "ζ <- complex(1e7); for (j in 1:1e7) ζ[j] <- complex(argument=j/1e7*2*pi, modulus=1)", "ζ <- complex( argument=1:1e7*2*pi, modulus=1 ))" ,times=5e4L); b<-Sys.time()
b-a

isomorphisms

#!/bin/bash
# peek
# look at N random lines of datafile.csv
# usage: rand datafile.csv N
# 	 rand	$1	  $2



head -1 $1					#names row of $1