Your supervisor is interested to identify certain factors that may be helpful to explain your Portfolio return. Henceforth, you need to identify certain factors that might influence your chosen Portfolio's and comment on the explainability of the chosen factors.

Note: Kindly mention the data source from where you have fetched data for the factors.

Hint: You have to regress your Portfolio Return on your chosen factors

Insert the code chunk below.............................. i have historical data of VIX and DXY_US …these are the names of file …VIX has column Date and AdjClose and DXY_US has column date and price …All this is historical monthly data between April 30, 2008, to January 29, 2021…................Can you please give me code for this question and before this the mentioned code i have done 
"{r}
# Define the data for Strategy 1
strategy1_selection <- data.frame(
  Asset = c("T", "PFE", "XAU", "GOOGL", "USDINR"),
  Median_Return = c(0.009617963, 0.002619454, 0.001102195, -0.002813010, -0.003632318),
  Standard_Deviation = c(0.04303437, 0.01576457, 0.03418468, 0.04782845, 0.04273717)
)

# Calculate reward-to-risk ratios for Strategy 1
strategy1_selection$Reward_to_Risk <- strategy1_selection$Median_Return / strategy1_selection$Standard_Deviation

# Define the data for Strategy 2
strategy2_selection <- data.frame(
  Asset = c("EURUSD", "NG", "PFE", "GOOGL", "T"),
  Median_Return = c(-0.006003852, -0.005380718, 0.002619454, -0.002813010, 0.009617963),
  Standard_Deviation = c(0.03204665, 0.04763956, 0.01576457, 0.04782845, 0.04303437),
  Reward_to_Risk = c(-0.18734726, -0.11294642, 0.16616080, -0.05881458, 0.22349493)
)

# Calculate reward-to-risk ratios for Strategy 2
strategy2_selection$Reward_to_Risk <- strategy2_selection$Median_Return / strategy2_selection$Standard_Deviation

# Total reward-to-risk ratio for each strategy
total_ratio_strategy1 <- sum(strategy1_selection$Reward_to_Risk)
total_ratio_strategy2 <- sum(strategy2_selection$Reward_to_Risk)

# Calculate weights for each strategy
weights_strategy1 <- (strategy1_selection$Reward_to_Risk / total_ratio_strategy1) * 100
weights_strategy2 <- (strategy2_selection$Reward_to_Risk / total_ratio_strategy2) * 100

# Print weights for Strategy 1
cat("Weights for Strategy 1:\n")
for (i in 1:nrow(strategy1_selection)) {
  cat(strategy1_selection$Asset[i], ":", round(weights_strategy1[i], 2), "%\n")
}
cat("\n")

# Print weights for Strategy 2
cat("Weights for Strategy 2:\n")
for (i in 1:nrow(strategy2_selection)) {
  cat(strategy2_selection$Asset[i], ":", round(weights_strategy2[i], 2), "%\n")
}

# Global Minimum Variance Portfolio - without short selling
# For GMVP, the weights are calculated based on minimizing portfolio variance
# The weights are inversely proportional to the asset's risk (standard deviation)
gmvp_weights <- 1 / strategy1_selection$Standard_Deviation
gmvp_weights <- gmvp_weights / sum(gmvp_weights) * 100

cat("\nGlobal Minimum Variance Portfolio Weights (without short selling):\n")
for (i in 1:nrow(strategy1_selection)) {
  cat(strategy1_selection$Asset[i], ":", round(gmvp_weights[i], 2), "%\n")
}

# GMVP without short selling for Strategy 2
gmvp_weights_strategy2 <- 1 / strategy2_selection$Standard_Deviation
gmvp_weights_strategy2 <- gmvp_weights_strategy2 / sum(gmvp_weights_strategy2) * 100

cat("\nGlobal Minimum Variance Portfolio Weights (without short selling) for Strategy 2:\n")
for (i in 1:nrow(strategy2_selection)) {
  cat(strategy2_selection$Asset[i], ":", round(gmvp_weights_strategy2[i], 2), "%\n")
}

# Tangency Portfolio - with short selling
# For the Tangency Portfolio, weights are calculated based on maximizing the Sharpe ratio
# This involves short selling to achieve the optimal risk-return trade-off

# Tangency Portfolio for Strategy 1
strategy1_tangency_weights <- strategy1_selection$Reward_to_Risk
strategy1_tangency_weights <- strategy1_tangency_weights / sum(strategy1_tangency_weights) * 100

cat("\nTangency Portfolio Weights (with short selling) for Strategy 1:\n")
for (i in 1:nrow(strategy1_selection)) {
  cat(strategy1_selection$Asset[i], ":", round(strategy1_tangency_weights[i], 2), "%\n")
}

# Tangency Portfolio for Strategy 2
strategy2_tangency_weights <- strategy2_selection$Reward_to_Risk
strategy2_tangency_weights <- strategy2_tangency_weights / sum(strategy2_tangency_weights) * 100

cat("\nTangency Portfolio Weights (with short selling) for Strategy 2:\n")
for (i in 1:nrow(strategy2_selection)) {
  cat(strategy2_selection$Asset[i], ":", round(strategy2_tangency_weights[i], 2), "%\n")
}

# Portfolio Return and Risk Measures
# Portfolio Return is the weighted sum of individual asset returns
portfolio_return_strategy1 <- sum(weights_strategy1 * strategy1_selection$Median_Return)
portfolio_return_strategy2 <- sum(weights_strategy2 * strategy2_selection$Median_Return)

# Portfolio Risk is calculated using the weighted standard deviation of assets
portfolio_risk_strategy1 <- sqrt(sum((weights_strategy1/100)^2 * strategy1_selection$Standard_Deviation^2))
portfolio_risk_strategy2 <- sqrt(sum((weights_strategy2/100)^2 * strategy2_selection$Standard_Deviation^2))

cat("\nPortfolio Return and Risk Measures:\n")
cat("Strategy 1 Portfolio Return: ", round(portfolio_return_strategy1, 6), "\n")
cat("Strategy 1 Portfolio Risk: ", round(portfolio_risk_strategy1, 6), "\n")
cat("Strategy 2 Portfolio Return: ", round(portfolio_return_strategy2, 6), "\n")
cat("Strategy 2 Portfolio Risk: ", round(portfolio_risk_strategy2, 6), "\n")

# Portfolio Return and Risk Measures for GMVP
gmvp_portfolio_return <- sum(gmvp_weights * strategy1_selection$Median_Return)
gmvp_portfolio_risk <- sqrt(sum((gmvp_weights/100)^2 * strategy1_selection$Standard_Deviation^2))

cat("GMVP Portfolio Return: ", round(gmvp_portfolio_return, 6), "\n")
cat("GMVP Portfolio Risk: ", round(gmvp_portfolio_risk, 6), "\n")

gmvp_portfolio_return_strategy2 <- sum(gmvp_weights_strategy2 * strategy2_selection$Median_Return)
gmvp_portfolio_risk_strategy2 <- sqrt(sum((gmvp_weights_strategy2/100)^2 * strategy2_selection$Standard_Deviation^2))

cat("Strategy 2 Portfolio Return: ", round(gmvp_portfolio_return_strategy2, 6), "\n")
cat("Strategy 2 Portfolio Risk: ", round(gmvp_portfolio_risk_strategy2, 6), "\n")

# Portfolio Return and Risk Measures for Tangency Portfolio
tangency_portfolio_return_strategy1 <- sum(strategy1_tangency_weights * strategy1_selection$Median_Return)
tangency_portfolio_risk_strategy1 <- sqrt(sum((strategy1_tangency_weights/100)^2 * strategy1_selection$Standard_Deviation^2))

cat("Tangency Portfolio Return (Strategy 1): ", round(tangency_portfolio_return_strategy1, 6), "\n")
cat("Tangency Portfolio Risk (Strategy 1): ", round(tangency_portfolio_risk_strategy1, 6), "\n")

tangency_portfolio_return_strategy2 <- sum(strategy2_tangency_weights * strategy2_selection$Median_Return)
tangency_portfolio_risk_strategy2 <- sqrt(sum((strategy2_tangency_weights/100)^2 * strategy2_selection$Standard_Deviation^2))

cat("Tangency Portfolio Return (Strategy 2): ", round(tangency_portfolio_return_strategy2, 6), "\n")
cat("Tangency Portfolio Risk (Strategy 2): ", round(tangency_portfolio_risk_strategy2, 6), "\n")"