我有一个数字数组,我想用一个简单的方程式计算值。
import numpy as np
import sympy as sym
x_values = np.linspace(0, 2, 100)
function = lambda x : 10*sym.sin(9*x)
function(x_values)
我得到:
AttributeError: 'ImmutableDenseNDimArray' object has no attribute 'could_extract_minus_sign'
答案 0 :(得分:2)
您可以使用sympy.lambdify
来执行此操作,如下所示:
import numpy as np
import sympy as sym
x = sym.symbols("x")
x_values = np.linspace(0, 2, 100)
function = sym.lambdify(x, 10*sym.sin(9*x), "numpy")
function(x_values)
答案 1 :(得分:0)
您应该定义一个函数
import numpy as np
import sympy as sym
x_values = np.linspace(0, 2, 100)
def function(x):
lambda x : 10*sym.sin(9*x)
return x
print(function(x_values))
代码:http://tpcg.io/cBEnHu 或者你可以这样做
import numpy as np
from sympy import sin
import pylab as pl
from sympy.abc import x
from sympy import Function
from sympy import *
x_values = np.linspace(0, 2, 100)
function = lambdify(x, 10*sin(9*x))
print(function(x_values ))