通用函数（ufunc）¶

Mars tensor 提供通用函数（也被称为 ufunc）来支持各种元素操作。Mars tensor 的通用函数支持 Numpy 的以下功能：

Mars 张量通用函数目前不支持包括方法有 accumulate、reduceat、outer 和 at。

可用的通用函数¶

`mars.tensor.add`	按元素相加
`mars.tensor.subtract`	按元素相减
`mars.tensor.multiply`	按元素相乘
`mars.tensor.divide`	按元素相除
`mars.tensor.logaddexp`	按元素计算以e为底的两个输入指数值之和的对数值
`mars.tensor.logaddexp2`	按元素计算以2为底的两个输入指数值之和的对数值
`mars.tensor.true_divide`	按元素计算实数除法
`mars.tensor.floor_divide`	按元素计算除法并向下取整
`mars.tensor.negative`	按元素求相反数
`mars.tensor.power`	按元素求幂，前一个张量中的数值作为底数，后一个张量的数值作为指数
`mars.tensor.remainder`	按元素返回整数除法的余数
`mars.tensor.mod`	按元素返回整数除法的余数
`mars.tensor.fmod`	按元素返回整数除法的余数
`mars.tensor.absolute`	按元素计算绝对值
`mars.tensor.rint`	按元素将张量中的值取整到最接近的整数
`mars.tensor.sign`	按元素取符号
`mars.tensor.exp`	计算所有元素的指数值
`mars.tensor.exp2`	计算所有元素以2为底的指数值
`mars.tensor.log`	按元素求自然对数
`mars.tensor.log2`	计算所有元素以2为底的对数值
`mars.tensor.log10`	计算所有元素以10为底的对数值
`mars.tensor.expm1`	对张量中的所有元素计算 `exp(x) - 1`
`mars.tensor.log1p`	对张量中的所有元素计算 `log(1 + x)`
`mars.tensor.sqrt`	返回按元素求平方根的结果
`mars.tensor.square`	返回按元素求平方的结果
`mars.tensor.reciprocal`	返回按元素求倒数的结果

`mars.tensor.sin`	Trigonometric sine, element-wise.
`mars.tensor.cos`	Cosine element-wise.
`mars.tensor.tan`	Compute tangent element-wise.
`mars.tensor.arcsin`	Inverse sine, element-wise.
`mars.tensor.arccos`	Trigonometric inverse cosine, element-wise.
`mars.tensor.arctan`	Trigonometric inverse tangent, element-wise.
`mars.tensor.arctan2`	Element-wise arc tangent of `x1/x2` choosing the quadrant correctly.
`mars.tensor.hypot`	Given the "legs" of a right triangle, return its hypotenuse.
`mars.tensor.sinh`	Hyperbolic sine, element-wise.
`mars.tensor.cosh`	Hyperbolic cosine, element-wise.
`mars.tensor.tanh`	Compute hyperbolic tangent element-wise.
`mars.tensor.arcsinh`	Inverse hyperbolic sine element-wise.
`mars.tensor.arccosh`	Inverse hyperbolic cosine, element-wise.
`mars.tensor.arctanh`	Inverse hyperbolic tangent element-wise.
`mars.tensor.deg2rad`	Convert angles from degrees to radians.
`mars.tensor.rad2deg`	Convert angles from radians to degrees.

`mars.tensor.bitwise_and`	Compute the bit-wise AND of two tensors element-wise.
`mars.tensor.bitwise_or`	Compute the bit-wise OR of two tensors element-wise.
`mars.tensor.bitwise_xor`	Compute the bit-wise XOR of two arrays element-wise.
`mars.tensor.invert`	Compute bit-wise inversion, or bit-wise NOT, element-wise.
`mars.tensor.left_shift`	Shift the bits of an integer to the left.
`mars.tensor.right_shift`	Shift the bits of an integer to the right.

`mars.tensor.greater`	Return the truth value of (x1 > x2) element-wise.
`mars.tensor.greater_equal`	Return the truth value of (x1 >= x2) element-wise.
`mars.tensor.less`	Return the truth value of (x1 < x2) element-wise.
`mars.tensor.less_equal`	Return the truth value of (x1 =< x2) element-wise.
`mars.tensor.not_equal`	Return (x1 != x2) element-wise.
`mars.tensor.equal`	Return (x1 == x2) element-wise.
`mars.tensor.logical_and`	Compute the truth value of x1 AND x2 element-wise.
`mars.tensor.logical_or`	Compute the truth value of x1 OR x2 element-wise.
`mars.tensor.logical_xor`	Compute the truth value of x1 XOR x2, element-wise.
`mars.tensor.logical_not`	Compute the truth value of NOT x element-wise.
`mars.tensor.maximum`	Element-wise maximum of tensor elements.
`mars.tensor.minimum`	Element-wise minimum of tensor elements.
`mars.tensor.fmax`	Element-wise maximum of array elements.
`mars.tensor.fmin`	Element-wise minimum of array elements.

`mars.tensor.isfinite`	Test element-wise for finiteness (not infinity or not Not a Number).
`mars.tensor.isinf`	Test element-wise for positive or negative infinity.
`mars.tensor.isnan`	Test element-wise for NaN and return result as a boolean tensor.
`mars.tensor.signbit`	Returns element-wise True where signbit is set (less than zero).
`mars.tensor.copysign`	Change the sign of x1 to that of x2, element-wise.
`mars.tensor.nextafter`	Return the next floating-point value after x1 towards x2, element-wise.
`mars.tensor.modf`	Return the fractional and integral parts of a tensor, element-wise.
`mars.tensor.ldexp`	Returns x1 * 2**x2, element-wise.
`mars.tensor.frexp`	Decompose the elements of x into mantissa and twos exponent.
`mars.tensor.fmod`	按元素返回整数除法的余数
`mars.tensor.floor`	Return the floor of the input, element-wise.
`mars.tensor.ceil`	Return the ceiling of the input, element-wise.
`mars.tensor.trunc`	Return the truncated value of the input, element-wise.

mars.tensor.array

mars.tensor.add