python - python中的黎曼和

Question

我需要帮助编写一个程序，该程序将使用黎曼定义（左右规则）来计算f(x)=sin(x)from a=0to的积分b=2*pi。我可以手动完成好几天，但我对如何用 python 编写代码一无所知。

score 1 · Accepted Answer

你看过这段代码了吗： http: //statmath.org/calculate_area.pdf

# Calcuate the area under a curve
#
# Example Function y = x^2
#
# This program integrates the function from x1 to x2
# x2 must be greater than x1, otherwise the program will print an error message.
#
x1 = float(input('x1='))
x2 = float (input('x2='))
if x1 > x2:
print('The calculated area will be negative')
# Compute delta_x for the integration interval
#
delta_x = ((x2-x1)/1000)
j = abs ((x2-x1)/delta_x)
i = int (j)
print('i =', i)
# initialize
n=0
A= 0.0
x = x1
# Begin Numerical Integration
while n < i:
delta_A = x**2 * delta_x
x = x + delta_x
A = A + delta_A
n = n+1
print('Area Under the Curve =', A)