import numpy r=input('请输入圆半径:') print('圆面积为:{:.2f}'.format(3.14*(numpy.square(float(r))) 7.方法七 import math pi=math.pi def circle_area(): r=float(input('请输入半径:')) s=pi*r*r print('圆面积为:{:.2f}'.format(s)) circle_area() 8.方法八 # 该方法适用于...
根据上述公式计算R方值。 下面是一个简单的示例,演示了如何计算R方值: # Sample dataactual=[2,4,5,4,5]predicted=[2.5,3.5,4.5,4,5.5]# Calculate mean of actual valuesmean_actual=sum(actual)/len(actual)# Calculate total sum of squaresss_tot=sum((val-mean_actual)**2forvalinactual)# Calcula...
结论 通过以上步骤,我们成功地拟合了二次函数并计算了r方值。这个过程可以帮助我们更好地理解数据集中的趋势和规律,为后续的数据分析和预测提供支持。 journey title 数据拟合之旅 section 数据准备 Prepare data section 拟合二次函数 Fit quadratic function section 计算r方 Calculate r square 引用形式的描述信息请...
To find the square of a number - simple multiple the number two times. 要查找数字的平方-将数字简单乘以两次。 Program: 程序: # Python program to calculate square of a number # Method 1 (using number*number) # input a number number = int (raw_input ("Enter an integer number: ")) # ...
def calculate_regular_polygon_area(side_length, number_of_sides): return (side_length**2 * number_of_sides) / (4 * math.tan(math.pi / number_of_sides)) “` 以上这些函数都是根据各种形状的公式来计算面积的,可以根据具体的需求调用相应的函数来求解。同时,这些函数中使用了一些数学运算和数学常量...
defcalculate_square_root(number):ifnumber<0:raiseValueError("不能对负数求平方根")else:returnnumber**0.5try:result=calculate_square_root(-4)print(result)exceptValueErrorase:print(e) 异常处理最佳实践 具体明确的异常处理:尽量捕获特定的异常类型,以便更精准地处理错误情况,避免捕获过于宽泛的异常。
return si*co*r def scaling_coefficients_(scaling_angles): """ convert scaling angles in hypersphere to scaling coefficients """ return ct(1,scaling_angles) def sqrt_p_(x_data, scaling_angles): """ Calculate the square root of the density estimate as the wavelet expansion ...
train_size], X[train_size:]history = [x for x in train]# make predictionspredictions = list()for t in range(len(test)):model = ARIMA(history, order=arima_order)model_fit = model.fit(disp=0)yhat = model_fit.forecast()[0]predictions.append(yhat)history.append(test[t])# calculate ...
def square(x): """ A simple function to calculate the square of a number by addition. """ sum_so_far = 0 for counter in range(x): sum_so_far = sum_so_far + x return sum_so_farOutput (Python 2.x):>>> square(10) 10...
代码:defcalculate_ichimoku_cloud(df):# Tenkan-sen (Conversion Line)nine_period_high = df['high'].rolling(window=9).max() nine_period_low = df['low'].rolling(window=9).min() df['tenkan_sen'] = (nine_period_high + nine_period_low) /2# Kijun-sen (Base Line)twenty_six_period_hi...