tchakravarty

library(tidyverse)
library(FinancialMath)
library(FinCal)
library(writexl)

# loan parameters
loan_amount = 4.8e6
roi_0 = 0.0925
tenure_0 = 48

tchakravarty

library(wakefield)
df_foo = r_series(rnorm, 10, 1000)

# create quantized versions of base variables
df_foo %>% 
  mutate_each(
    funs(Quantized = . > 0)
  )

tchakravarty

library(tidyverse)
library(modelr)
library(lazyeval)
library(purrr)

# create the dataset
df_foo = wakefield::r_data_frame(
  n = 100,
  wakefield::r_series(wakefield::r_sample, j = 5, name = "cat"),
  Y = wakefield::normal()

tchakravarty

library(ggplot2)
library(dplyr)
library(scales)

df_foo = data_frame(
  var1 = sample(LETTERS[1:4], size = 100, replace = TRUE),
  var2 = sample(letters[1:4], size = 100, replace = TRUE)
)

# stacked absolute bar chart

tchakravarty

library(ggplot2)
library(grid)
library(tidyr)
library(gtable)
library(dplyr)

gg_foo3_colors = c("#F8766D", "#00BFC4")

df_foo = read.csv(text = ",Russia,World
1996,0,423

tchakravarty

Once, Fermat contrariated Gauss, and the result was "The Last Fermat Theorem" (bye bye Fermat!)
Gauss had already known the website 'Gauss Facts', so he saved his time for an autobiography.
Gauss can walk through Konigsberg crossing its bridges once and only once
Gauss knows an algorithm to compute the class group of any normal variety.
Gauss once proved the Fundamental Theorem of Algebra by explicitly writing out every nonconstant polynomial over the complex numbers and writing each as a product of linear factors.
Gauss once determined whether P = NP, but didn't think it was important enough to publish.
Gauss can prove axioms.
A mathematician, a physicist, and an engineer walk into a bar. The bartender says, "Hello, Professor Gauss."
Gauss can invert matrices even if its determinant is zero.  
Gauss solves Navier-Stokes equations by hand.

tchakravarty

    user www-data;
    worker_processes 4;
    pid /run/nginx.pid;
    
    events {
    	worker_connections 768;
    	# multi_accept on;
    }
    
    http {

tchakravarty

alabaster==0.7.7
awscli==1.6.2
Babel==2.3.3
backports-abc==0.4
backports.shutil-get-terminal-size==1.0.0
backports.ssl-match-hostname==3.4.0.2
bcdoc==0.12.2
boto==2.33.0
botocore==0.73.0
certifi==2015.4.28

tchakravarty

#==============================================================================
# purpose: get the column number from the column name in Excel 
# author: tirthankar chakravarty
# created: 22nd february 2016
# revised: 22nd february 2016
# comments: 
# - based on this SO answer: http://stackoverflow.com/a/1004624/1414455
#==============================================================================

excel_name_to_number = function(name) {

tchakravarty

# http://chat.stackoverflow.com/transcript/message/28317173#28317173
# the list() invocation creates a list but that is not assigned to the
#   local namespace. append() changes it but does not return the 
#   the original object which is now lost
bar = list(range(0,8)).append(23)
print(bar)

# this breaks down the creation and the mutation into two
foo = list(range(0,8))
foo.append(23)