Supported NumPy functions

The csdm object supports the use of NumPy functions, as

>>> y = np.func(x) 

where x and y are the csdm objects, and func is any one of the following functions. These functions apply to each component of the dependent variables from a given csdm object, x.

Trigonometric functions

The trigonometric functions apply to the components of the dependent variables from a csdm object.

Note

The components must be dimensionless quantities.

Table 1 A list of supported trigonometric functions.

Functions	Description
sin	Apply sine to the components of the dependent variables
cos	Apply cosine to the components of the dependent variables
tan	Apply tangent to the components of the dependent variables
arcsin	Apply inverse sine to the components of the dependent variables
arccos	Apply inverse cosine to the components of the dependent variables
arctan	Apply inverse tangent to the components of the dependent variables
sinh	Apply hyperbolic sine to the components of the dependent variables
cosh	Apply hyperbolic cosine to the components of the dependent variables
tanh	Apply hyperbolic tangent to the components of the dependent variables
arcsinh	Apply inverse hyperbolic sine to the components of the dependent variables
arccosh	Apply inverse hyperbolic cosine to the components of the dependent variables
arctanh	Apply inverse hyperbolic tangent to the components of the dependent variables

Mathematical operations

The following mathematical functions apply to the components of the dependent variables from a csdm object.

Note

The components must be dimensionless quantities.

Table 2 A list of supported mathematical functions.

Functions	Description
exp	Calculate the exponential of the components of the dependent variables.
expm1	Apply \(e^x - 1\), where x are the components of the dependent variables.
exp2	Calculate \(2^x\), where x are the components of the dependent variables.
log	Calculate natural logarithm of the components of the dependent variables.
log1p	Calculate natural logarithm plus one on the components of the dependent variables.
log2	Calculate base-2 logarithm of the components of the dependent variables.
log10	Calculate base-10 logarithm of the components of the dependent variables.

The following mathematical functions apply to the components of the dependent variables from a csdm object irrespective of the components’ dimensionality.

Table 3 Arithmetic operations

Functions	Description
reciprocal	Return element-wise reciprocal.
positive	Return element-wise numerical positive.
negative	Return element-wise numerical negative.

Table 4 Miscellaneous

Functions	Description
sqrt	Return element-wise non-negative square-root.
cbrt	Return element-wise cube-root.
square	Return element-wise square.
absolute	Return element-wise absolute value.
fabs	Return element-wise absolute value.
sign	Return element-wise sign of the values.

Table 5 Handling complex numbers

Functions	Description
angle	Return element-wise angle of a complex value.
real	Return element-wise real part of a complex value.
imag	Return element-wise imaginary part of a complex value.å
conj	Return element-wise conjugate.
conjugate	Return element-wise conjugate.

Table 6 Sums, products, differences

Functions	Description
prod	Return the product of the components of a dependent variable along a dimension.
sum	Return the sum of the components of a dependent variable along a dimension.

Table 7 Rounding

Functions	Description
rint	Round elements to the nearest integer.
around	Round elements to the given number of decimals.
round	Round elements to the given number of decimals.

Other functions

• min

• max

• mean

• var

• std