python_numpy库_ndarray的属性

目录

1、ndim(维度)

2、shape(形状)

3、size(总长度)

4、dtype(元素类型)

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1、ndim(维度)

n = np.random.rand(3,4)
print(n)
w = n.ndim
print(w)

2、shape(形状)

*三个数字分别表示各个维度的长度

n = np.random.rand(3,4)
print(n)
w = n.ndim
print(w)
x = n.shape
print(x)

3、size(总长度)

*即：行和乘列和

n = np.random.rand(3,4)
print(n)
w = n.ndim
print(w)
x = n.shape
print(x)
c = n.size
print(c)

4、dtype(元素类型)

n = np.random.rand(3,4)
print(n)
w = n.ndim
print(w)
x = n.shape
print(x)
c = n.size
print(c)
l = n.dtype
print(l)