Impara Visualizing Environmental Data | Environmental Data Exploration

Data visualization is essential in environmental science because it transforms complex datasets into understandable and actionable insights. By visualizing data, you can quickly identify patterns, trends, and anomalies that would be difficult to spot in raw tables or numerical summaries. This is especially important in environmental science, where variables such as temperature, rainfall, and air quality often change over time and can be influenced by many factors. Python's matplotlib library is a powerful tool for creating a wide range of plots, making it a popular choice for environmental data analysis and communication.


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import pandas as pd
import matplotlib.pyplot as plt

# Sample daily temperature data
data = {
    "Date": ["2024-06-01", "2024-06-02", "2024-06-03", "2024-06-04", "2024-06-05", "2024-06-06", "2024-06-07"],
    "Temperature": [22.5, 24.1, 23.8, 25.3, 27.6, 26.4, 24.9]
}
df = pd.DataFrame(data)

plt.plot(df["Date"], df["Temperature"], label="Daily Temperature")
plt.title("Daily Temperature Readings")
plt.xlabel("Date")
plt.ylabel("Temperature (°C)")
plt.legend()
plt.show()

Each part of a plot serves a key role in making environmental data more accessible and meaningful. The title gives context, letting you know what the visualization represents—such as Daily Temperature Readings in the example above. Axes labels clarify what each axis measures, like Date on the x-axis and Temperature (°C) on the y-axis, so you can interpret the data values correctly. The legend identifies different data series or categories, which is especially useful when comparing multiple datasets on the same plot. Together, these components make it easier to interpret environmental trends, spot unusual events, and communicate findings clearly.


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import pandas as pd
import matplotlib.pyplot as plt

# Reuse the same temperature data
data = {
    "Date": ["2024-06-01", "2024-06-02", "2024-06-03", "2024-06-04", "2024-06-05", "2024-06-06", "2024-06-07"],
    "Temperature": [22.5, 24.1, 23.8, 25.3, 27.6, 26.4, 24.9]
}
df = pd.DataFrame(data)

# Highlight temperature extremes
plt.plot(df["Date"], df["Temperature"], color="skyblue", marker="o", label="Temperature")

# Highlight the maximum temperature
max_temp = df["Temperature"].max()
max_date = df["Date"][df["Temperature"].idxmax()]
plt.scatter(max_date, max_temp, color="red", label="Max Temp", zorder=5)

# Highlight the minimum temperature
min_temp = df["Temperature"].min()
min_date = df["Date"][df["Temperature"].idxmin()]
plt.scatter(min_date, min_temp, color="blue", label="Min Temp", zorder=5)

plt.title("Daily Temperature Readings with Extremes Highlighted")
plt.xlabel("Date")
plt.ylabel("Temperature (°C)")
plt.legend()
plt.show()

1. Why is visualization important in environmental data analysis?

2. Which matplotlib function is used to display a plot window?

3. Fill in the blank: To add a title to a matplotlib plot, use plt.______('Your Title').

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