5.17. imarith

Performs an arithmetic operation on the FitsArray object.

FitsArray.imarith(self, other: Self | Fits | float | int | List[Fits | float | int], operand: str, output: str | None = None) → Self

Performs an arithmetic operation on the FitsArray object.

Notes

This method can perform arithmetic operations using numeric values, other Fits objects, lists of numeric values, or FitsArray objects.

  • If other is numeric, each element of the matrix will be processed with that number.

  • If other is another Fits object, element-wise operations will be applied.

  • If other is a list of numeric values, the first value will be applied to each matrix. The number of elements in the list must equal the number of elements in the FitsArray.

  • If other is another FitsArray, element-wise operations will be applied. The number of elements in both FitsArray objects must be equal.

Parameters

otherUnion[Self, Fits, float, int, List[Union[Fits, float, int]]]

Either a FitsArray object, list of floats, list of integers, Fits object, float, or integer.

operandstr

The operation to be performed as a string. One of ["+", "-", "*", "/", "**", "^"].

outputOptional[str]

New path to save the files.

Returns

FitsArray

A new FitsArray object containing the saved FITS files.

Raises

NumberOfElementError

Raised when the length of other is incorrect.

5.17.1. Example:

from myraflib import FitsArray, Fits

fa = FitsArray.sample()
fa_2 = FitsArray.sample()

fits = Fits.sample()

# same thing can be done for all of "+", "-", "*", "/", "**", "^" operations
added_fa_1 = fa.imarith(10, "+")
added_fa_2 = fa.imarith(fits, "+")
added_fa_3 = fa.imarith([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], "+")
added_fa_4 = fa.imarith([Fits.sample() for _ in range(10)], "+")
added_fa_5 = fa.imarith(fa_2, "+")