NEWS.md

Unitful.jl changelog

v1.21.0 (2024-07-19)

• Arithmetic between Dates.TimeType and Unitful.Time is added, e.g., Dates.now() + 1u"hr" now works (#731).

v1.20.0 (2024-05-17)

• isapprox with arrays of quantities now supports the nans keyword argument (#719).
• isapprox with arrays of quantities now calculates the default rtol correctly, i.e., rtol defaults to zero if a positive atol is specified, like in the scalar or unitless case (#719).
• isapprox with arrays of quantities now checks whether norm(x-y) ≤ max(atol, rtol*max(norm(x), norm(y))), like in the scalar or unitless case, instead of norm(x-y) ≤ atol + rtol*max(norm(x), norm(y)) (#719).

v1.19.1 (2024-05-13)

• Broadcasting upreferred, ustrip, or a unit (when used as a conversion function) over ranges now works correctly again (#711, #715).
• Broadcasting upreferred, ustrip, or a unit (when used as a conversion function) over a StepRange now returns a StepRangeLen when the conversion results in floating-point numbers (#715).

v1.19.0 (2023-11-29)

• The dimensionless units parts per cent mille (pcm, 10^-5), parts per million (ppm, 10^-6), parts per billion (ppb, 10^-9), parts per trillion (ppt, 10^-12), and parts per quadrillion (ppq, 10^-15) are added (#699).

v1.18.0 (2023-11-13)

• The two-argument versions of nextfloat and prefloat now allow quantities as their first argument (#692).

v1.17.0 (2023-08-24)

• The standard atmosphere (atm) now accepts SI prefixes, e.g., μatm is defined (#664).

v1.16.3 (2023-08-14)

• Calling min and max with quantities of different units can no longer return wrong results due to floating-point overflow in the unit conversion (#675).
• min and max now handle quantities with NaN values correctly (#675).
• Base.hastypemax is now correctly implemented for quantity types (#674).

v1.16.2 (2023-08-05)

• The conversion factors between units can no longer be wrongly calculated as NaN, Inf, or 0 (which could happen, e.g., in the case of large exponents). The conversion factor is now calculated correctly in more cases, and an error is thrown if it cannot be calculated due to floating-point over- or underflow (#648).

v1.16.1 (2023-08-02)

• Replaced occurrences of single-argument @doc for duplicating docstrings, which could lead to errors when creating a Docker image with Julia 1.9 and Unitful (#671).

v1.16.0 (2023-08-01)

• The derived dimension MolarMass (𝐌/𝐍) is added (#663).
• Dimensionless quantities now support the tanpi function added in Julia 1.10 (#620).

v1.15.0 (2023-07-05)

• Support for InverseFunctions.jl is extended to all supported Julia versions. On Julia < 1.9, InverseFunctions.jl is added as a regular dependency (#652).
• On Julia ≥ 1.9, ConstructionBase.jl is now a weak dependency. On older versions, it is still a regular dependency. (#658).

v1.14.0 (2023-05-11)

• On Julia ≥ 1.9, InverseFunctions.jl can be used to get the inverse function of Base.Fix1(ustrip, u::Units) (#622).
• <= now works correctly for AbstractQuantity{T} when T is a type for which <=(x::T,y::T) is different than x < y || x == y (#646).

v1.13.1 (2023-04-15)

• Adapt test suite for Julia 1.9 (#643).

v1.13.0 (2023-04-11)

• Base.sleep now accepts quantities of time as argument (#628).
• Base.copysign and Base.flipsign can now be called with a plain number as first argument and a quantity as second argument (#612).
• All known method ambiguities of the package are resolved (#606, #626).
• The package now has a logo. It was created by Leandro Martínez and shows the International Prototype of the Kilogram (#567, #634).

v1.12.4 (2023-02-27)

• @fastmath with quantities now uses functions from Base.FastMath instead of intrinsic functions, because the latter may be removed at any time (#617).

v1.12.3 (2023-02-10)

• Multiplication is no longer assumed to be commutative, which is wrong for, e.g., quaternions (#608).
• Adapt the documentation on extending Unitful for Julia ≥ 1.9 (#600).

v1.12.2 (2022-11-30)

• Broadcasting upreferred over floating-point ranges now works again (#577).

v1.12.1 (2022-11-18)

• Fixed istriu/istril for affine quantities (#572).

v1.12.0 (2022-09-17)

• Dimensionless quantities now support cispi, sincospi, and modf (#533, #539).
• Ranges of affine quantities are now printed correctly (#551).
• The non-existent functions convertr and convertrp are no longer exported (#530).

v1.11.0 (2022-02-10)

• Base.zero now works on heterogeneous arrays of quantities, e.g., zero([1m, 1s]) == [0m, 0s] (#533, #516).
• StepRangeLens of complex-valued quantities are now printed correctly (#513).
• Method ambiguities of Base._range are resolved (#514).
• Updated range implementation for Julia ≥ 1.8 (#514).

v1.10.1 (2022-01-03)

• Fixed isapprox for arrays of complex-valued quantities (#468).

v1.10.0 (2021-12-27)

• Dimensions and units can now be documented by adding a docstring before the @dimension, @refunit, @unit, and @affineunit macro calls. The @dimension, @derived_dimension, @refunit, and @unit macros have an optional boolean argument autodocs to add autogenerated docstrings to some objects generated by these macros. All dimensions, units and constants defined in this package now have docstrings (#476).
• Calling preferunits with non-pure units (e.g., preferunits(C/ms)) no longer results in wrong behavior (#478).
• Fixed some invalidations to improve compile times (#509).
• Broadcasting ustrip, upreferred, and * over a range now returns another range instead of a Vector (#501, #503).
• LinearAlgebra.norm now returns a floating-point quantity, which matches the behavior for Base numbers (#500).

v1.9.2 (2021-11-12)

• The functions Unitful.cos_fast, Unitful.sin_fast, and Unitful.tan_fast are removed. Due to an implementation error, they always threw a MethodError, so removing them is not breaking. This fixes a warning during precompilation (#497).

v1.9.1 (2021-10-27)

• Multiplying a StepRangeLen by Units now preserves the floating-point precision (#485).
• Make ^(::AbstractQuantity, ::Rational) inferrable on Julia ≥ 1.8 (#487).
• Updated multiplication of range and quantity for Julia ≥ 1.8 compatibility (#489, #495).

v1.9.0 (2021-07-16)

• deg2rad and rad2deg can now be used to convert between ° and rad (#459).

v1.8.0 (2021-05-31)

• The IOContext property :fancy_exponent can be used to control the printing of exponents in units (i.e., m² or m^2). Previously, this could only be done by setting the environment variable UNITFUL_FANCY_EXPONENTS. The :fancy_exponent property overrides the environment variable (#446).

v1.7.0 (2021-04-02)

• The functions dimension, unit, absoluteunit, upreferred, and numtype now support AbstractQuantity (instead of just Quantity) arguments (#431).
• Support for conversion between Unitful.Time and Dates.FixedPeriod types is added (#331).

v1.6.0 (2021-02-14)

• Support for the Base.unordered function is added (#406).
• The CGS units Gauss (Gauss), Oersted (Oe), and Maxwell (Mx) are added (#397).
• Removed a wrong use of @eval that broke precompilation (#417).
• The traits Base.ArithmeticStyle and Base.OrderStyle are now implemented correctly to support number types that are not defined in Base (#407).
• == and isequal now work correctly for Gains and Levels with bignums (#404).
• range(start; step, length) now always creates a functioning range when start and step have different units (#411).
• It is no longer possible to create a Level with non-real value or reference quantity (#400, #421).
• Macro hygiene is improved (#390).

v1.5.0 (2020-10-21)

• Dimensionless quantities now support inverse and hyperbolic trig functions (#387).

v1.4.1 (2020-09-17)

• Adapt test suite to Julia ≥ 1.6 type parameter printing (#380).

v1.4.0 (2020-08-11)

• It is now possible to divide an array by units (#369).
• Complex and mixed quantities are now printed with brackets (#366).

v1.3.0 (2020-06-26)

• isless is now defined for logarithmic quantities (#315).
• Calling div, rem, etc. with affine quantities now errors (#354).
• Custom printing of types was removed (#322).

v1.2.1 (2020-05-26)

• Fix an error when converting units with fractional power (#335).

v1.2.0 (2020-05-10)

• The unit Year now allows SI prefixes (#320).
• Unit conversions can now return integer-valued quantities if the conversion factor is whole (#323).

v1.1.0 (2020-04-09)

• div, fld, cld now allow arguments of different dimensions as long as one of them is a plain number (i.e., not an AbstractQuantity), e.g., div(10m, 3) == 3m and cld(10, 3m) == 4/m (#317).
• Unicode superscript can now be used to to display powers in units and dimensions (e.g., m² instead of m^2). The UNITFUL_FANCY_EXPONENTS environment variable can be used to control whether unicode powers are used or not (#297).
• The unit Year (yr) is defined, equal to 365.25 days (#288).
• round with the digits/sigdigits keyword now works correctly for quantities that are not based on floating-point numbers. It returns a float-based quantity in those cases (#308).

v1.0.0 (2020-01-27)

• The uparse function can be used to parse units and quantities from a string (#298).
• The constructors Float16, Float32, Float64, and BigFloat can be used to convert a quantity to one based on the specified floating-point type, e.g., Float64(1m) === 1.0m. The float function can be used to convert a quantity to an appropriate floating-point type (#296).
• The unit Pertenthousand (‱) is added (#294).
• Calling the two-argument atan with quantities that have the same numeric type and dimension but different units no longer errors (#293).

v0.18.0 (2019-11-27)

• Quantity types now support the constructorof function from the ConstructionBase.jl package (#280).
• Using units as conversion functions now supports missing (#278).
• The unit Angstrom (Å or angstrom) is added (#271).

v0.17.0 (2019-09-08)

• The unit rps (revolutions per second) is now equal to 2π*rad/s instead of 1/s and the unit rpm (revolutions per minute) is now equal to 2π*rad/minute instead of 1/minute (#268).
• The derived dimensions MassFlow (𝐌/𝐓), MolarFlow (𝐍/𝐓), and VolumeFlow (𝐋^3/𝐓) are added (#269).
• The dimensions power density (𝐌 𝐋^-1 𝐓^-3) and work (𝐋^2 𝐌 𝐓^-2) are marked as power-like for use with logarithmic quantities (#267).
• zero(::Type{<:AbstractQuantity{T,D}}) where {T,D} can be used to get an additive identity with numeric type T and dimension D (#266).
• The unit Molar (M) is added (#258).
• Unitful.register now extends Unitful.basefactors, so packages that define units don’t have to do it themselves (#251).
• Ranges of quantities are now printed in a more concise way (#256).
• Angular degrees are now printed without a space between the number and unit, in compliance with the SI standard (#255).
• zero now errors if the dimension of its argument is unspecified (#266).
• Unitful.promote_to_derived works again (#252).

v0.16.0 (2019-07-01)

• The physical constants are updated to the CODATA 2018 recommended values (#235).
• On Julia v1, the rounding functions round, ceil, floor, and trunc now accept all keyword arguments that are supported for plain numbers. In addition, the first argument to these functions can be a unit instead of a type (#246, #249, #250).
• The functions Base.complex, Base.reim, and Base.widen can now be called with unitful quantities (#227).
• The function upreferred now supports missing (#224).
• Two-argument and three-argument ustrip now support dimensionless quantities and missing (#212).
• Better support for number types that customize their MIME"text/plain" printing (#213).
• Ranges which use Base.TwicePrecision internally now work correctly (#245).
• Fixed some issues around use of @generated functions that could lead to world-age errors or wrong behavior (#233, #243).

v0.15.0 (2019-03-05)

• The functions uconvert, ustrip, unit, and dimension as well as arithmetic with units now support missing (#208).
• Two-argument ustrip(unit, x) and three-argument ustrip(T, unit, x) methods are added (#205).
• The AbstractQuantity{T,D,U} type is defined to support defining quantity types other than Quantity{T,D,U} (#204).
• The derived dimensions Molarity (𝐍/𝐋^3) and Molality (𝐍/𝐌) are added (#198).
• Multiplying a range by units now works correctly (#206).

Older changes

• v0.14.0
  • Support for digits kwarg (#196).
  • Try to support precompilation with u_str macro (#201).
• v0.13.0
  • Implement affine quantities for better temperature handling (#177, #182).
  • Rename °Ra to Ra to emphasize that it is an absolute scale.
  • Fix some precompilation issues (#161).
  • Add Velocity, Acceleration, Density derived dimensions (#187).
  • Days display as d now (#184).
  • Type signature of Quantitys has been simplified. Helps with reading error messages (#183).
  • Support isequal with NaN quantities (#172).
• v0.12.0
  • Bug fixes.
  • Support carrier-to-noise-density ratio (C/N0) in dB-Hz.
  • Added dimensions: DField, EField, ElectricDipoleMoment, ElectricQuadrupoleMoment, MagneticDipoleMoment.
  • Added unit: barn.
  • Some documentation improvements.
• v0.11.0--v0.9.0
  • Fixes for Julia 0.7 update, primarily.
  • Some new TwicePrecision functionality for quantities.
• v0.8.0
  • Add Rydberg constant, unified atomic mass unit, mils, rpm, rps, percent, permille.
  • Introduce/rename derived dimensions: ElectricalConductivity, ElectricalResistivity, ElectricalConductance, ElectricalResistance.
  • Fix some Julia 0.7 deprecations.
  • This will probably be the last release that supports Julia 0.6.
• v0.7.1
  • Bug fixes, mainly.
• v0.7.0
  • Implement mod2pi for degrees, cleanup display of degree units.
  • Tweak implementation of Gain types for usability.
  • Implement zero and one for Level and Gain.
  • Add a few more cgs units.
  • Tests pass on 32-bit systems, for the first time in a long time (ever?).
• v0.6.1
  • Permit symbols that are bound to Numbers to be used in u_str macro, such that π and other non-literal numbers can be used.
  • Add some cgs units and a few dimensions #115.
  • Fix a comparison / promotion bug introduced in v0.6.0.
• v0.6.0
  • Restore compatibility with 0.7.0-DEV.
• v0.5.1
  • Dimensionless quantities no longer lose their units when dividing by a real number.
  • Ranges constructed via range or colon should work more reliably (e.g., 0:10°:350° works now).
• v0.5.0
  • Add dBΩ and dBS to permit working with impedances and admittances in dB. These are used in the Touchstone format and in microwave measurements.
  • Implement angle for Quantity{<:Complex}.
  • Implement float for Gain, Level.
  • Replace fieldratio and rootpowerratio with uconvertrp.
    • Permits unit conversion between NoUnits and dB, etc. by presuming unitless ratios are of root-power quantities (hence the rp after uconvert).
    • uconvertrp has generic fallbacks and can be used as a drop-in replacement for uconvert otherwise.
  • Likewise, replace powerratio with uconvertp for ratios of power quantities.
  • Introduce convertrp and convertp. These are like convert but they make similar assumptions about unitless ratios being of power or root-power quantities, respectively.
  • Implement more division operations for Gains (accidental omissions)
• v0.4.0
  • Introduce logarithmic quantities (experimental!)
  • Update syntax for Julia 0.6 and reorganize code for clarity.
  • Redefine ustrip(x::Quantity) = ustrip(x.val). In most cases, this is unlikely to affect user code. The generic fallback ustrip(x::Number) remains unchanged.
  • isapprox(1.0u"m",5) returns false instead of throwing a DimensionError, in keeping with the behavior of an equality check (==).
  • Display of some units has changed to match their symbols #104.
  • Don't export cd from Unitful.DefaultSymbols in order to avoid conflicts #102.
  • Deprecated dimension(x::AbstractArray{T}) where T<:Number, use broadcasting instead.
  • Deprecated dimension(x::AbstractArray{T}) where T<:Units, use broadcasting instead.
  • Deprecated ustrip(A::AbstractArray{T}) where T<:Number, use broadcasting instead.
  • Deprecated ustrip(A::AbstractArray{T}) where T<:Quantity, use broadcasting instead.
• v0.3.0
  • Require Julia 0.6
  • Adds overloads for rand and ones #96.
  • Improve symbol resolution in u_str macro #98.
  • More work is done inside the u_str macro, such that the macro returns units, dimensions, numbers (quantities), or tuples rather than expressions.
• v0.2.6
  • Fix and close #52.
  • Implement Base.rtoldefault for Quantity types (needed for AxisArrays #52).
• v0.2.5
  • Fix and close #79.
  • Add support for round(T, ::DimensionlessQuantity) where T <: Integer (also floor, ceil, trunc) #90.
• v0.2.4
  • Bug fix: avoid four-argument promote_type
  • Bug fix: define method for *(::Base.TwicePrecision, ::Quantity)
  • Bug fix: definition of Bohr magneton had e instead of q
• v0.2.3
  • Dimensionful quantities are no longer accepted for floor, ceil, trunc, round, isinteger. The choice of units can yield physically different results. The functions are defined for dimensionless quantities, and return unitless numbers. Closes #78.
  • Added gn, a constant quantity for the gravitational acceleration on earth #75.
  • Added ge, the gravitational acceleration on earth as a unit #75.
  • Added lbf, pounds-force unit #75.
• v0.2.2
  • Fixed a bug in promotion involving ContextUnits where the promotion context might not be properly retained.
• v0.2.1
  • Fixed isapprox bug #74.
  • Added DimensionlessQuantity methods for exp, exp10, exp2, expm1, log1p, log2 #71.
• v0.2.0
  • Units{N,D} is now an abstract type. Different concrete types for units give different behavior under conversion and promotion. The currently implemented concrete types are:
    • FreeUnits{N,D}: these give the typical behavior from prior versions of Unitful. Units defined in Unitful.jl and reachable by the u_str macro are all FreeUnits.
    • ContextUnits{N,D,P}, where P is some type FreeUnits{M,D}: these enable context-specific promotion rules, e.g. if units are defined in different packages.
    • FixedUnits{N,D}: these inhibit automatic conversion of quantities with different units.
  • LengthUnit, EnergyUnit, etc. are renamed to LengthUnits, EnergyUnits, etc. for consistency (they are related more to Units objects than Unit objects). You can still use the old names for now, but please switch over to using ...Units instead of ...Unit in this release as the old names will be removed in a future release.
  • c is now a unit, to permit converting mass into MeV/c^2, for example. c0 is still a quantity equal to the speed of light in vacuum, in units of m/s #67.
• v0.1.5
  • Patch for Julia PR #20889, which changes how lowering is done for exponentiation of integer literals.
  • Bug fix to enable registering Main as a module for u_str (fixes #61).
  • Implement readable message for DimensionError #62.
• v0.1.4
  • Critical bug fix owing to mod_fast changes.
• v0.1.3
  • Fix symmetry of == #56.
  • Using @refunit will implicitly specify the ref. unit as the default for promotion. This will not change behavior for most people; it just ensures promotion won't fail for quantities with user-defined dimensions.
  • Remove mod_fast in anticipation of Julia PR #20859.
  • Allow tolerance args for isapprox #57
• v0.1.2
  • On Julia 0.6, exponentiation by a literal is now type stable for integers.
• v0.1.1
  • Fixed a macro hygiene issue that prevented @dimension and @derived_dimension from working properly if Compat was not imported in the calling namespace.
• v0.1.0
  • Julia 0.6 compatibility.
  • On Julia 0.6, exponentiation by a literal is now type stable for common integer powers: -3, -2, -1, 0, 1, 2, 3.
  • Added missing methods for dot operators .< and .<= (Julia 0.5, fix #55).
  • Fix #45. Ranges should work as expected on Julia 0.6. On Julia 0.5, Ranges.jl is used to make ranges work as well as possible given limitations in Base.
  • Fix #33, #42, and #50. deps/Defaults.jl is dead. Long live deps/Defaults.jl. To define your own units, dimensions, and so on, you should now put them in a module, or ideally a package so that others can use the definitions too. You can override default promotion rules immediately after loading Unitful and dependent packages; this will generate method overwrite warnings on Julia 0.5 but not on 0.6.
  • @u_str macro has been improved. It can now traverse separate unit packages, as well as return tuples of Units objects.
  • @preferunit has been replaced with a function preferunits.
  • Added some methods for ustrip.
  • Implement typemin, typemax, cbrt for Quantitys.
  • Added matrix inversion for StridedMatrix{T<:Quantity}.
  • Added istriu, istril for AbstractMatrix{T<:Quantity}.
  • The Unitful.SIUnits module has been renamed to Unitful.DefaultSymbols.
  • Add lb, oz, dr, gr to Unitful (international Avoirdupois mass units).
• v0.0.4
  • Be aware, breaking changes to deps/Defaults.jl caused by some of the following!
  • Fix #40.
  • Fix #30.
  • Support relevant @fastmath operations for Quantitys.
  • Implement fma, atan2 for Quantitys.
  • Implement cis for dimensionless Quantitys.
  • Removed DimensionedUnits and DimensionedQuantity abstract types. They were of dubious utility, and this change shortened the promotion code considerably. More importantly, this change has made it possible to write methods like the following, without method ambiguities: uconvert(e::EnergyUnit, f::Frequency) = uconvert(e, u"h"*f).
  • Promotion wraps usual Number types in dimensionless, unitless Quantity types when promoted together with dimensionful Quantitys. With Quantitys it is not always possible to promote to a common concrete type, but this way we can at least ensure that the numeric backing types are all promoted: (promote(1.0u"m", 1u"N"//2, 0x08) == (1.0 m,0.5 N,8.0), where 8.0 is actually a dimensionless, unitless Quantity). The usual outer constructor for Quantitys (Quantity(val::T, unit)) continues to return a number of type T if the unit is NoUnits, since most of the time the user would prefer a Number type from base rather than a dimensionless, unitless quantity.
  • Add more units to defaults: bar (bar), Torr (torr), atm (atmosphere), l or L (liter; both symbols accepted). You will need to delete deps/Defaults.jl in the Unitful package directory to get the new units.
  • Two character encodings for μ in SI prefixes are now generated automatically (some logic moved out of defaults).
  • Moved definition of sin, cos, tan, sec, csc, cot out of deps/build.jl and into src/Unitful.jl.
• v0.0.3
  • Bug fix: uconvert(°C, 0x01°C) no longer disturbs the numeric type
  • Allow μ-prefixed units to be typed with option-m on a Mac, in addition to using Unicode. Previously only μm could be typed this way.
  • Include a baremodule called SIUnits in the factory defaults. You can now do using Unitful.SIUnits to bring all of the SI units into the calling namespace.
  • Added remaining SI units to the factory defaults: sr (steradian), lm (luminous flux), lx (illuminance), Bq (becquerel), Gy (gray), Sv (sievert), kat (katal).
  • Simplify array creation, as in [1, 2]u"km" #29
  • Support multiplying ranges by units, as in (1:3)*mm #28
  • Bug fix #26
  • Promoting Quantitys with different dimensions now returns quantities with the same numeric backing type, e.g. Quantity{Float64}. Ideally, this would also be true if you mixed unitless and unitful numbers during promotion, but that is not yet the case. See #24 for motivation.
• v0.0.2
  • Bug fixes ([1.0m, 2.0m] ./ 3 would throw a Unitful.DimensionError()). Promotion still isn't perfect, but it is hard for me to see what @inferred errors are real until JuliaLang/julia#18465 is resolved.
  • Made units callable for unit conversion: u"cm"(1u"m") == 100u"cm"//1. Note that Units objects have no fields, so this is totally unambiguous. Moreover, we have convenient syntax for unit conversion by function chaining: 1u"m" |> u"cm" == 100u"cm"//1. Note that uconvert will remain supported.
• v0.0.1 - Initial release