anirudhjayaraman

### Linear Regression Using lm() ----------------------------------------
data("swiss")
dat <- swiss
linear_model <- lm(Fertility ~ ., data = dat)
summary(linear_model)


# Call:
# lm(formula = Fertility ~ ., data = dat)
# 

anirudhjayaraman

remove_missing_levels <- function(fit, test_data) {
  library(magrittr)
  
  # https://stackoverflow.com/a/39495480/4185785
  
  # drop empty factor levels in test data
  test_data %>%
    droplevels() %>%
    as.data.frame() -> test_data
  

anirudhjayaraman

library(data.table)

train <- fread('train.csv'); test <- fread('test.csv')

# consolidate the 2 data sets after creating a variable indicating train / test 
train$flag <- 0; test$flag <- 1
dat <- rbind(train,test)

# change outcome, var_b and var_e into factor var
dat$outcome <- factor(dat$outcome)

anirudhjayaraman

---
title: "ARIMA Modeling in R"
output: html_document
---

Let's start off by loading relevant R libraries!
```{r include = FALSE}
library(tseries)
library(zoo)
library(forecast)

anirudhjayaraman

library(xlsx)
library(forecast)
library(tseries)
library(strucchange)

## load the data from a CSV or Excel file. This example is done with an Excel sheet.
prod_df <- read.xlsx(file = 'agricultural_productivity.xls', sheetIndex = 'Sheet1', rowIndex = 8:65, colIndex = 2, header = FALSE)
colnames(prod_df) <- c('Rice')
## store rice data as time series objects
rice <- ts(prod_df$Rice, start=c(1951, 1), end=c(2008, 1), frequency=1) 

anirudhjayaraman

# assuming you have a 'ts' object in R 

# 1. install package 'strucchange'
# 2. Then write down this code:

library(strucchange)

# store the breakdates
bp_ts <- breakpoints(ts ~ 1)

anirudhjayaraman

anirudhjayaraman

{}

{}


["A:['B', 'C', 'E']", "C:['A', 'B', 'D', 'E']", "B:['A', 'C', 'D']", "E:['A', 'C']", "D:['B', 'C']"]

[[ 0.  1.  1.  0.  1.]
 [ 1.  0.  1.  1.  0.]
 [ 1.  1.  0.  1.  1.]

anirudhjayaraman

class Vertex:
    def __init__(self, vertex):
        self.name = vertex
        self.neighbors = []
        
    def add_neighbor(self, neighbor):
        if isinstance(neighbor, Vertex):
            if neighbor.name not in self.neighbors:
                self.neighbors.append(neighbor.name)
                neighbor.neighbors.append(self.name)

anirudhjayaraman