South ural state university, Chelyabinsk, Russian federation
#Import
library(fpp2)
## Registered S3 method overwritten by 'quantmod':
## method from
## as.zoo.data.frame zoo
## -- Attaching packages ---------------------------------------------- fpp2 2.4 --
## v ggplot2 3.3.5 v fma 2.4
## v forecast 8.13 v expsmooth 2.3
## Warning: package 'ggplot2' was built under R version 4.0.5
##
library(forecast)
library(ggplot2)
library("readxl")
library(moments)
library(forecast)
require(forecast)
require(tseries)
## Loading required package: tseries
require(markovchain)
## Loading required package: markovchain
## Package: markovchain
## Version: 0.8.5-3
## Date: 2020-12-03
## BugReport: https://github.com/spedygiorgio/markovchain/issues
require(data.table)
## Loading required package: data.table
## Warning: package 'data.table' was built under R version 4.0.5
library(Hmisc)
## Loading required package: lattice
## Loading required package: survival
## Loading required package: Formula
##
## Attaching package: 'Hmisc'
## The following objects are masked from 'package:base':
##
## format.pval, units
library(ascii)
##Global vriable##
Full_original_data <- read.csv("data.csv") # path of your data ( time series data)
original_data<-Full_original_data$cases
y_lab <- "Forecast First wave infection cases in chelyabinsk" # input name of data
Actual_date_interval <- c("2020/03/12","2020/11/30")
Forecast_date_interval <- c("2020/12/01","2020/12/30")
validation_data_days <-25
frequency<-"days"
Number_Neural<-3 # Number of Neural For model NNAR Model
NNAR_Model<- TRUE #create new model (TRUE/FALSE) #create new model (TRUE/FALSE)
frequency<-"days"
# Data Preparation & calculate some of statistics measures
summary(original_data) # Summary your time series
## Min. 1st Qu. Median Mean 3rd Qu. Max.
## 0.00 62.00 89.00 95.64 132.00 276.00
# calculate standard deviation
data.frame(kurtosis=kurtosis(original_data)) # calculate Cofficient of kurtosis
## kurtosis
## 1 2.86046
data.frame(skewness=skewness(original_data)) # calculate Cofficient of skewness
## skewness
## 1 0.4027947
data.frame(Standard.deviation =sd(original_data))
## Standard.deviation
## 1 62.9977
#processing on data (input data)
rows <- NROW(original_data) # calculate number of rows in time series (number of days)
training_data<-original_data[1:(rows-validation_data_days)] # Training data
testing_data<-original_data[(rows-validation_data_days+1):rows] #testing data
AD<-fulldate<-seq(as.Date(Actual_date_interval[1]),as.Date(Actual_date_interval[2]), frequency) #input range for actual date
FD<-seq(as.Date(Forecast_date_interval[1]),as.Date(Forecast_date_interval[2]), frequency) #input range forecasting date
N_forecasting_days<-nrow(data.frame(FD)) #calculate number of days that you want to forecasting
validation_dates<-tail(AD,validation_data_days) # select validation_dates
validation_data_by_name<-weekdays(validation_dates) # put names of validation dates
forecasting_data_by_name<-weekdays(FD) # put names of Forecasting dates
#NNAR Model
if(NNAR_Model==TRUE){
data_series<-ts(training_data)
model_NNAR<-nnetar(data_series, size = Number_Neural)
saveRDS(model_NNAR, file = "model_NNAR.RDS")
my_model <- readRDS("model_NNAR.RDS")
accuracy(model_NNAR) # accuracy on training data #Print Model Parameters
model_NNAR
}
## Series: data_series
## Model: NNAR(5,3)
## Call: nnetar(y = data_series, size = Number_Neural)
##
## Average of 20 networks, each of which is
## a 5-3-1 network with 22 weights
## options were - linear output units
##
## sigma^2 estimated as 119
if(NNAR_Model==FALSE){
data_series<-ts(training_data)
#model_NNAR<-nnetar(data_series, size = Number_Numeral)
model_NNAR <- readRDS("model_NNAR.RDS")
accuracy(model_NNAR) # accuracy on training data #Print Model Parameters
model_NNAR
}
# Testing Data Evaluation
forecasting_NNAR <- forecast(model_NNAR, h=N_forecasting_days+validation_data_days)
validation_forecast<-head(forecasting_NNAR$mean,validation_data_days)
MAPE_Per_Day<-round( abs(((testing_data-validation_forecast)/testing_data)*100) ,3)
paste ("MAPE % For ",validation_data_days,frequency,"by using NNAR Model for ==> ",y_lab, sep=" ")
## [1] "MAPE % For 25 days by using NNAR Model for ==> Forecast First wave infection cases in chelyabinsk"
MAPE_Mean_All<-paste(round(mean(MAPE_Per_Day),3),"% MAPE ",validation_data_days,frequency,y_lab,sep=" ")
MAPE_Mean_All_NNAR<-round(mean(MAPE_Per_Day),3)
MAPE_NNAR<-paste(round(MAPE_Per_Day,3),"%")
MAPE_NNAR_Model<-paste(MAPE_Per_Day ,"%")
paste (" MAPE that's Error of Forecasting for ",validation_data_days," days in NNAR Model for ==> ",y_lab, sep=" ")
## [1] " MAPE that's Error of Forecasting for 25 days in NNAR Model for ==> Forecast First wave infection cases in chelyabinsk"
paste(MAPE_Mean_All,"%")
## [1] "5.473 % MAPE 25 days Forecast First wave infection cases in chelyabinsk %"
paste ("MAPE that's Error of Forecasting day by day for ",validation_data_days," days in NNAR Model for ==> ",y_lab, sep=" ")
## [1] "MAPE that's Error of Forecasting day by day for 25 days in NNAR Model for ==> Forecast First wave infection cases in chelyabinsk"
print(ascii(data.frame(date_NNAR=validation_dates,validation_data_by_name,actual_data=testing_data,forecasting_NNAR=validation_forecast,MAPE_NNAR_Model)), type = "rest")
##
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | | date_NNAR | validation_data_by_name | actual_data | forecasting_NNAR | MAPE_NNAR_Model |
## +====+============+=========================+=============+==================+=================+
## | 1 | 2020-11-06 | Friday | 179.00 | 182.28 | 1.831 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 2 | 2020-11-07 | Saturday | 181.00 | 189.32 | 4.598 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 3 | 2020-11-08 | Sunday | 185.00 | 194.06 | 4.897 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 4 | 2020-11-09 | Monday | 186.00 | 197.98 | 6.443 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 5 | 2020-11-10 | Tuesday | 189.00 | 200.72 | 6.2 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 6 | 2020-11-11 | Wednesday | 194.00 | 203.91 | 5.11 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 7 | 2020-11-12 | Thursday | 197.00 | 207.02 | 5.088 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 8 | 2020-11-13 | Friday | 201.00 | 209.61 | 4.284 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 9 | 2020-11-14 | Saturday | 207.00 | 211.79 | 2.312 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 10 | 2020-11-15 | Sunday | 209.00 | 213.28 | 2.046 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 11 | 2020-11-16 | Monday | 211.00 | 214.51 | 1.661 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 12 | 2020-11-17 | Tuesday | 210.00 | 215.49 | 2.613 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 13 | 2020-11-18 | Wednesday | 215.00 | 216.28 | 0.597 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 14 | 2020-11-19 | Thursday | 218.00 | 216.95 | 0.483 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 15 | 2020-11-20 | Friday | 219.00 | 217.43 | 0.718 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 16 | 2020-11-21 | Saturday | 213.00 | 217.80 | 2.252 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 17 | 2020-11-22 | Sunday | 218.00 | 218.06 | 0.025 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 18 | 2020-11-23 | Monday | 219.00 | 218.25 | 0.345 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 19 | 2020-11-24 | Tuesday | 223.00 | 218.39 | 2.067 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 20 | 2020-11-25 | Wednesday | 228.00 | 218.50 | 4.169 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 21 | 2020-11-26 | Thursday | 241.00 | 218.58 | 9.304 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 22 | 2020-11-27 | Friday | 252.00 | 218.64 | 13.239 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 23 | 2020-11-28 | Saturday | 261.00 | 218.68 | 16.214 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 24 | 2020-11-29 | Sunday | 272.00 | 218.71 | 19.591 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
## | 25 | 2020-11-30 | Monday | 276.00 | 218.73 | 20.748 % |
## +----+------------+-------------------------+-------------+------------------+-----------------+
print(ascii(data.frame(FD,forecating_date=forecasting_data_by_name,forecasting_by_NNAR=tail(forecasting_NNAR$mean,N_forecasting_days))), type = "rest")
##
## +----+------------+-----------------+---------------------+
## | | FD | forecating_date | forecasting_by_NNAR |
## +====+============+=================+=====================+
## | 1 | 2020-12-01 | Tuesday | 218.75 |
## +----+------------+-----------------+---------------------+
## | 2 | 2020-12-02 | Wednesday | 218.76 |
## +----+------------+-----------------+---------------------+
## | 3 | 2020-12-03 | Thursday | 218.77 |
## +----+------------+-----------------+---------------------+
## | 4 | 2020-12-04 | Friday | 218.78 |
## +----+------------+-----------------+---------------------+
## | 5 | 2020-12-05 | Saturday | 218.78 |
## +----+------------+-----------------+---------------------+
## | 6 | 2020-12-06 | Sunday | 218.79 |
## +----+------------+-----------------+---------------------+
## | 7 | 2020-12-07 | Monday | 218.79 |
## +----+------------+-----------------+---------------------+
## | 8 | 2020-12-08 | Tuesday | 218.79 |
## +----+------------+-----------------+---------------------+
## | 9 | 2020-12-09 | Wednesday | 218.79 |
## +----+------------+-----------------+---------------------+
## | 10 | 2020-12-10 | Thursday | 218.79 |
## +----+------------+-----------------+---------------------+
## | 11 | 2020-12-11 | Friday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 12 | 2020-12-12 | Saturday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 13 | 2020-12-13 | Sunday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 14 | 2020-12-14 | Monday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 15 | 2020-12-15 | Tuesday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 16 | 2020-12-16 | Wednesday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 17 | 2020-12-17 | Thursday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 18 | 2020-12-18 | Friday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 19 | 2020-12-19 | Saturday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 20 | 2020-12-20 | Sunday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 21 | 2020-12-21 | Monday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 22 | 2020-12-22 | Tuesday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 23 | 2020-12-23 | Wednesday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 24 | 2020-12-24 | Thursday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 25 | 2020-12-25 | Friday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 26 | 2020-12-26 | Saturday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 27 | 2020-12-27 | Sunday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 28 | 2020-12-28 | Monday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 29 | 2020-12-29 | Tuesday | 218.80 |
## +----+------------+-----------------+---------------------+
## | 30 | 2020-12-30 | Wednesday | 218.80 |
## +----+------------+-----------------+---------------------+
plot(forecasting_NNAR,xlab = paste ("Time in", frequency ,y_lab , sep=" "), ylab=y_lab)
x1_test <- ts(testing_data, start =(rows-validation_data_days+1) )
lines(x1_test, col='red',lwd=2)
graph1<-autoplot(forecasting_NNAR,xlab = paste ("Time in", frequency ,y_lab , sep=" "), ylab=y_lab)
graph1+scale_y_continuous(labels = scales::comma)+
forecast::autolayer(forecasting_NNAR$mean, series="NNAR Model",size = 0.7) +
guides(colour=guide_legend(title="Forecasts"),fill = "black")+
theme(legend.position="bottom")+
theme(legend.background = element_rect(fill="white",
size=0.7, linetype="solid",
colour ="gray"))
