Regresi-Nonparametrik-Tugas-Dataset-1.R

data = read.table(file.choose(), header = T)
data

##      Y  X1   X2   X3
## 1 57.5  78 2.75 29.5
## 2 52.8  69 2.15 26.3
## 3 61.3  77 4.41 32.2
## 4 67.0  88 5.52 36.5
## 5 53.5  67 3.21 27.2
## 6 62.7  80 4.32 27.7
## 7 56.2  74 2.31 28.3
## 8 68.5  94 4.30 30.3
## 9 69.2 102 3.71 28.7

# Memanggil library
library(ggplot2)

# 1. Scatterplot Y terhadap X1
ggplot(data, aes(x = X1, y = Y)) +
  geom_point(color = "darkgreen", size = 3, alpha = 0.8) +
  geom_smooth(method = "lm", se = TRUE, linewidth = 1.2) +
  labs(
    title = "Scatterplot Y terhadap X1",
    x = "X1",
    y = "Y"
  ) +
  theme_minimal() +
  theme(
    plot.title = element_text(hjust = 0.5, face = "bold"),
    axis.title = element_text(face = "bold"),
    panel.grid.minor = element_blank()
  )

## `geom_smooth()` using formula = 'y ~ x'

# 2. Scatterplot Y terhadap X2
ggplot(data, aes(x = X2, y = Y)) +
  geom_point(color = "darkgreen", size = 3, alpha = 0.8) +
  geom_smooth(method = "lm", se = TRUE, linewidth = 1.2) +
  labs(
    title = "Scatterplot Y terhadap X2",
    x = "X2",
    y = "Y"
  ) +
  theme_minimal() +
  theme(
    plot.title = element_text(hjust = 0.5, face = "bold"),
    axis.title = element_text(face = "bold"),
    panel.grid.minor = element_blank()
  )

## `geom_smooth()` using formula = 'y ~ x'

# 3. Scatterplot Y terhadap X3
ggplot(data, aes(x = X3, y = Y)) +
  geom_point(color = "darkgreen", size = 3, alpha = 0.8) +
  geom_smooth(method = "lm", se = TRUE, linewidth = 1.2) +
  labs(
    title = "Scatterplot Y terhadap X3",
    x = "X3",
    y = "Y"
  ) +
  theme_minimal() +
  theme(
    plot.title = element_text(hjust = 0.5, face = "bold"),
    axis.title = element_text(face = "bold"),
    panel.grid.minor = element_blank()
  )

## `geom_smooth()` using formula = 'y ~ x'