Attributes

ibeta : int

Radix in which numbers are represented.

it : int

Number of base-:None:None:`ibeta` digits in the floating point mantissa M.

machep : int

Exponent of the smallest (most negative) power of :None:None:`ibeta` that, added to 1.0, gives something different from 1.0

eps : float

Floating-point number beta**machep (floating point precision)

negep : int

Exponent of the smallest power of :None:None:`ibeta` that, subtracted from 1.0, gives something different from 1.0.

epsneg : float

Floating-point number beta**negep .

iexp : int

Number of bits in the exponent (including its sign and bias).

minexp : int

Smallest (most negative) power of :None:None:`ibeta` consistent with there being no leading zeros in the mantissa.

xmin : float

Floating-point number beta**minexp (the smallest [in magnitude] positive floating point number with full precision).

maxexp : int

Smallest (positive) power of :None:None:`ibeta` that causes overflow.

xmax : float

(1-epsneg) * beta**maxexp (the largest [in magnitude] usable floating value).

irnd : int

In range(6) , information on what kind of rounding is done in addition, and on how underflow is handled.

ngrd : int

Number of 'guard digits' used when truncating the product of two mantissas to fit the representation.

epsilon : float

Same as :None:None:`eps`.

tiny : float

An alias for :None:None:`smallest_normal`, kept for backwards compatibility.

huge : float

Same as :None:None:`xmax`.

precision : float

- int(-log10(eps))

resolution : float

- 10**(-precision)

smallest_normal : float

The smallest positive floating point number with 1 as leading bit in the mantissa following IEEE-754. Same as xmin .

smallest_subnormal : float

The smallest positive floating point number with 0 as leading bit in the mantissa following IEEE-754.

Parameters

float_conv : function, optional

Function that converts an integer or integer array to a float or float array. Default is :None:None:`float`.

int_conv : function, optional

Function that converts a float or float array to an integer or integer array. Default is :None:None:`int`.

float_to_float : function, optional

Function that converts a float array to float. Default is :None:None:`float`. Note that this does not seem to do anything useful in the current implementation.

float_to_str : function, optional

Function that converts a single float to a string. Default is lambda v:'%24.16e' %v .

title : str, optional

Title that is printed in the string representation of MachAr .

Diagnosing machine parameters.

See Also

finfo

Machine limits for floating point types.

iinfo

Machine limits for integer types.

Examples

See :

Back References

The following pages refer to to this document either explicitly or contain code examples using this.

numpy.finfo numpy.MachAr

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