x_value=np.linspace(-55,65,2400)
时间: 2023-06-14 22:07:39 浏览: 41
这行代码是在Python中使用NumPy库生成一个包含2400个元素的一维数组x_value,数组中的元素是从-55到65之间均匀分布的。具体来说,linspace函数的第一个参数是起始值,第二个参数是终止值,第三个参数是数组中元素的个数。在这个例子中,起始值是-55,终止值是65,所以数组中的元素是从-55到65之间均匀分布的2400个数值。
相关问题
import plotly.graph_objs as go import numpy as np # 定义函数 def f1(x,y,z): return (x**2 + y**2 - 1) * (x**2 + z**2 - 1) * (y**2 + z**2 - 1) - 1 def f2(x,y,z): return x**3/3 - y**2/2 - z # 定义数据 x,y,z = np.meshgrid(np.linspace(-2,2,50), np.linspace(-2,2,50), np.linspace(-2,2,50)) f1_value = f1(x,y,z) f2_value = f2(x,y,z) f3_value = f3(x,y,z) # 绘制图像 fig = go.Figure(data=go.Volume( x=x.flatten(), y=y.flatten(), z=z.flatten(), value=f1_value.flatten(), isomin=0, isomax=0, opacity=0.1, surface_count=10, colorscale='Reds', showscale=False )) fig.add_trace(go.Volume( x=x.flatten(), y=y.flatten(), z=z.flatten(), value=f2_value.flatten(), isomin=0, isomax=0, opacity=0.1, surface_count=10, colorscale='Blues', showscale=False )) fig.show()这个图画出来函数取值区间太小了,我想让取值区间更大一点,如何修改
要让函数取值区间更大,可以通过修改 `np.linspace` 函数中的参数来实现。这个函数用于生成一维的等差数列,因此可以通过修改其起始点和终止点来改变取值区间大小。例如,将 `np.linspace(-2,2,50)` 中的 `-2` 改为 `-5`,将 `2` 改为 `5`,就可以让取值区间更大。
修改后的代码如下:
```python
import plotly.graph_objs as go
import numpy as np
# 定义函数
def f1(x,y,z):
return (x**2 + y**2 - 1) * (x**2 + z**2 - 1) * (y**2 + z**2 - 1) - 1
def f2(x,y,z):
return x**3/3 - y**2/2 - z
# 定义数据
x,y,z = np.meshgrid(np.linspace(-5,5,50), np.linspace(-5,5,50), np.linspace(-5,5,50))
f1_value = f1(x,y,z)
f2_value = f2(x,y,z)
# 绘制图像
fig = go.Figure(data=go.Volume(
x=x.flatten(),
y=y.flatten(),
z=z.flatten(),
value=f1_value.flatten(),
isomin=0,
isomax=0,
opacity=0.1,
surface_count=10,
colorscale='Reds',
showscale=False
))
fig.add_trace(go.Volume(
x=x.flatten(),
y=y.flatten(),
z=z.flatten(),
value=f2_value.flatten(),
isomin=0,
isomax=0,
opacity=0.1,
surface_count=10,
colorscale='Blues',
showscale=False
))
fig.show()
```
在上述代码中,`np.linspace(-5,5,50)` 生成了一个区间为 `[-5, 5]`,长度为 `50` 的等差数列,即取值区间更大了。
import plotly.graph_objs as go import numpy as np from scipy import optimize def f1(x, y, z): return (x**2 + y**2 - 1) * (x**2 + z**2 - 1) * (y**2 + z**2 - 1) - 1 def f2(x, y, z): return x**3/3-y**2/2-z def intersection(f1, f2): def equations(p): x, y, z = p return (f1(x, y, z), f2(x, y, z)) x_min, x_max = -1, 1 y_min, y_max = -1, 1 z_min, z_max = -1, 1 x, y, z = optimize.fsolve(equations, (0, 0, 0)) if x_min <= x <= x_max and y_min <= y <= y_max and z_min <= z <= z_max: return x, y, z else: return None x = np.linspace(-1, 1, 50) y = np.linspace(-1, 1, 50) z = np.linspace(-1, 1, 50) X, Y, Z = np.meshgrid(x, y, z) Z1 = f1(X, Y, Z) Z2 = f2(X, Y, Z) fig = go.Figure() fig.add_trace(go.Isosurface(x=X.flatten(), y=Y.flatten(), z=Z.flatten(), value=Z1.flatten(), isomin=-1, isomax=1, surface_count=2, colorscale='Viridis', opacity=0.7)) fig.add_trace(go.Isosurface(x=X.flatten(), y=Y.flatten(), z=Z.flatten(), value=Z2.flatten(), isomin=-1, isomax=1, surface_count=2, colorscale='RdBu', opacity=0.7)) intersection_point = intersection(f1, f2) if intersection_point: fig.add_trace(go.Scatter3d(x=[intersection_point[0]], y=[intersection_point[1]], z=[intersection_point[2]], mode='markers', marker=dict(size=10, color='red'))) fig.show()这段代码没有输出,请帮我修改一下
这段代码的最后一行应该是调用 `intersection_point` 的情况下输出 `fig`,而不是直接调用 `fig.show()`。因此,你可以修改代码如下:
```python
import plotly.graph_objs as go
import numpy as np
from scipy import optimize
def f1(x, y, z):
return (x**2 + y**2 - 1) * (x**2 + z**2 - 1) * (y**2 + z**2 - 1) - 1
def f2(x, y, z):
return x**3/3-y**2/2-z
def intersection(f1, f2):
def equations(p):
x, y, z = p
return (f1(x, y, z), f2(x, y, z))
x_min, x_max = -1, 1
y_min, y_max = -1, 1
z_min, z_max = -1, 1
x, y, z = optimize.fsolve(equations, (0, 0, 0))
if x_min <= x <= x_max and y_min <= y <= y_max and z_min <= z <= z_max:
return x, y, z
else:
return None
x = np.linspace(-1, 1, 50)
y = np.linspace(-1, 1, 50)
z = np.linspace(-1, 1, 50)
X, Y, Z = np.meshgrid(x, y, z)
Z1 = f1(X, Y, Z)
Z2 = f2(X, Y, Z)
fig = go.Figure()
fig.add_trace(go.Isosurface(x=X.flatten(), y=Y.flatten(), z=Z.flatten(),
value=Z1.flatten(), isomin=-1, isomax=1, surface_count=2,
colorscale='Viridis', opacity=0.7))
fig.add_trace(go.Isosurface(x=X.flatten(), y=Y.flatten(), z=Z.flatten(),
value=Z2.flatten(), isomin=-1, isomax=1, surface_count=2,
colorscale='RdBu', opacity=0.7))
intersection_point = intersection(f1, f2)
if intersection_point:
fig.add_trace(go.Scatter3d(x=[intersection_point[0]],
y=[intersection_point[1]], z=[intersection_point[2]],
mode='markers', marker=dict(size=10, color='red')))
fig.show()
else:
print("No intersection point found.")
```
这样,当存在交点时,代码将输出图形;否则,将输出 "No intersection point found."。
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