Implementing Series in Python
In mathematics, series are sequences of numbers that follow a specific pattern. Two fundamental types of series are:
- Arithmetic series, where each term increases by a constant difference;
- Geometric series, where each term is multiplied by a constant ratio.
In Python, we can generate, manipulate, and visualize these series efficiently using lists and Matplotlib.
Defining an Arithmetic Series
An arithmetic series follows the formula:
Where:
a
is the first termd
is the common differencen
is the number of terms- A list comprehension generates
n
terms of the sequence. - Each term increases by
d
from the previous term. Example Calculation:
1234def arithmetic_series(n, a, d): return [a + i * d for i in range(n)] print(arithmetic_series(5, 2, 3)) # Output: [2, 5, 8, 11, 14]
Defining a Geometric Series
A geometric series follows the formula:
Where:
a
is the first termr
is the common ratio (Each term is multiplied byr
from the previous term.)n
is the number of terms
1234def geometric_series(n, a, r): return [a * r**i for i in range(n)] print(geometric_series(5, 2, 2)) # Output: [2, 4, 8, 16, 32]
Plotting the Series in Python
To visualize the sequences, we plot them using matplotlib
.
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647import numpy as np import matplotlib.pyplot as plt # Define parameters n = 10 a = 2 d = 3 r = 2 # Series generating functions def arithmetic_series(n, a, d): return [a + i * d for i in range(n)] def geometric_series(n, a, r): return [a * r**i for i in range(n)] # Generate series arith_seq = arithmetic_series(n, a, d) geo_seq = geometric_series(n, a, r) # Generate indices for x-axis x_values = np.arange(1, n + 1) # Create figure plt.figure(figsize=(10, 5)) # Plot Arithmetic Series plt.subplot(1, 2, 1) plt.plot(x_values, arith_seq, 'bo-', label='Arithmetic Series') plt.xlabel("n (Term Number)") plt.ylabel("Value") plt.title("Arithmetic Series: a + (n-1)d") plt.grid(True) plt.legend() # Plot Geometric Series plt.subplot(1, 2, 2) plt.plot(x_values, geo_seq, 'ro-', label='Geometric Series') plt.xlabel("n (Term Number)") plt.ylabel("Value") plt.title("Geometric Series: a * r^n") plt.grid(True) plt.legend() # Show plots plt.tight_layout() plt.show()
1. How would you plot an arithmetic series in Python using matplotlib
?
2. What will be the output of this code?
3. What Python function can you use to generate an arithmetic series with a first term of 2
and a common difference of 4
?
4. How do you define an arithmetic series function in Python?
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Implementing Series in Python
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In mathematics, series are sequences of numbers that follow a specific pattern. Two fundamental types of series are:
- Arithmetic series, where each term increases by a constant difference;
- Geometric series, where each term is multiplied by a constant ratio.
In Python, we can generate, manipulate, and visualize these series efficiently using lists and Matplotlib.
Defining an Arithmetic Series
An arithmetic series follows the formula:
Where:
a
is the first termd
is the common differencen
is the number of terms- A list comprehension generates
n
terms of the sequence. - Each term increases by
d
from the previous term. Example Calculation:
1234def arithmetic_series(n, a, d): return [a + i * d for i in range(n)] print(arithmetic_series(5, 2, 3)) # Output: [2, 5, 8, 11, 14]
Defining a Geometric Series
A geometric series follows the formula:
Where:
a
is the first termr
is the common ratio (Each term is multiplied byr
from the previous term.)n
is the number of terms
1234def geometric_series(n, a, r): return [a * r**i for i in range(n)] print(geometric_series(5, 2, 2)) # Output: [2, 4, 8, 16, 32]
Plotting the Series in Python
To visualize the sequences, we plot them using matplotlib
.
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647import numpy as np import matplotlib.pyplot as plt # Define parameters n = 10 a = 2 d = 3 r = 2 # Series generating functions def arithmetic_series(n, a, d): return [a + i * d for i in range(n)] def geometric_series(n, a, r): return [a * r**i for i in range(n)] # Generate series arith_seq = arithmetic_series(n, a, d) geo_seq = geometric_series(n, a, r) # Generate indices for x-axis x_values = np.arange(1, n + 1) # Create figure plt.figure(figsize=(10, 5)) # Plot Arithmetic Series plt.subplot(1, 2, 1) plt.plot(x_values, arith_seq, 'bo-', label='Arithmetic Series') plt.xlabel("n (Term Number)") plt.ylabel("Value") plt.title("Arithmetic Series: a + (n-1)d") plt.grid(True) plt.legend() # Plot Geometric Series plt.subplot(1, 2, 2) plt.plot(x_values, geo_seq, 'ro-', label='Geometric Series') plt.xlabel("n (Term Number)") plt.ylabel("Value") plt.title("Geometric Series: a * r^n") plt.grid(True) plt.legend() # Show plots plt.tight_layout() plt.show()
1. How would you plot an arithmetic series in Python using matplotlib
?
2. What will be the output of this code?
3. What Python function can you use to generate an arithmetic series with a first term of 2
and a common difference of 4
?
4. How do you define an arithmetic series function in Python?
Bedankt voor je feedback!