isomorphisms

$ bc -l
bc 1.06.95
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'. 

2^2
4

2^2^2

isomorphisms

# This computes the USD index which is the "broad measure of the US Dollar against a BASKET of currencies" rather than against a particular pair

getFX(c("USD/EUR", "USD/JPY", "USD/GBP", "USD/CAD", "USD/SEK", "USD/CHF"))

# The formula comes from ICE markets https://www.theice.com/publicdocs/futures_us/ICE_Dollar_Index_FAQ.pdf

e <- .576
y <- .136
s <- .119
l <- .091

isomorphisms

require(ggplot2); data(msleep); attach(msleep)



animal.brains <- na.omit( data.frame( name,      round( brainwt / bodywt * 100, 1)       ))

names(list) <- c("animal", "how.brainy")

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

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

# 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

" 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

#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

set from = "humility.consulting@gmail.com"
set realname = "Humility Consulting"


set imap_user = "humility.consulting@gmail.com"
set imap_pass = "my password in plaintest"

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

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