This library extends SIUnits.jl to handle Engineering units through a string macro. Variables with units can be written as:
julia> a = 3*25.4u"mm" 0.07619999999999999 m julia> b = 4 * u"inch" 0.1016 m julia> sqrt(a^2 + b^2)==5u"inch"
All units inputted with the unit string
u"", will be converted to the SI unit equvilant, hence one inch is converted to
0.00254 m. SI prefixes and operators can also be used in a unit string as:
julia> 1.0u"N/mm^2" 1.0e6 Pa
As it is an extension of SIUnits.jl it can also multiply units as:
julia> 1u"N"/1u"m^2" 1.0 Pa
The package do also enable the user to select the display unit as:
julia> a = 1000u"N*m" 1000.0 J julia> display_unit(u"kN*m", "kN m") julia> b = 1u"kN*m" 1.0 kN m julia> unitless(a) == unitless(b) true
Even though the display unit is kN m the calculations is performed using the siunit and the value of a and b are therefore the same. the only difference is how the value is displayed to the user.
u"in"do not give inches use
u"inch"instead. This is caused by
inis a infix operator in julia and because the unit string macro use julia's parser to parse the unit strings
incannot be used to mean inches.
unitlesson the variable.
Don't hesitate to file an issue or pull-request to improve the package.
about 3 years ago