Can't convert Celsius to K

[letmaik]

ucum.convert(20, 'Cel', 'K') throws a long syntax error. Shouldn't that work?

[jmandel]

This is a missing feature: the only conversions ucum.js handles are units
that differ in magnitude but share a common "zero". Agreed this would be
good to support (and I'm surprised it hasn't come up before now).
On Feb 14, 2016 06:29, "Maik Riechert" [email protected] wrote:

ucum.convert(20, 'Cel', 'K') throws a long syntax error. Shouldn't that
work?

—
Reply to this email directly or view it on GitHub
#5.

[letmaik]

For reference, here's all the function-defined units:

   <unit xmlns="" Code="Cel" CODE="CEL" isMetric="yes" isSpecial="yes" class="si">
      <name>degree Celsius</name>
      <printSymbol>&#176;C</printSymbol>
      <property>temperature</property>
      <value Unit="cel(1 K)" UNIT="CEL(1 K)">
         <function name="Cel" value="1" Unit="K"/>
      </value>
   </unit>

   <unit xmlns="" Code="[degF]" CODE="[DEGF]" isMetric="no" isSpecial="yes" class="heat">
      <name>degree Fahrenheit</name>
      <printSymbol>&#176;F</printSymbol>
      <property>temperature</property>
      <value Unit="degf(5 K/9)" UNIT="DEGF(5 K/9)">
         <function name="degF" value="5" Unit="K/9"/>
      </value>
   </unit>

   <unit xmlns="" Code="[p'diop]" CODE="[P'DIOP]" isMetric="no" isSpecial="yes"
         class="clinical">
      <name>prism diopter</name>
      <printSymbol>PD</printSymbol>
      <property>refraction of a prism</property>
      <value Unit="100tan(1 rad)" UNIT="100TAN(1 RAD)">
         <function name="tanTimes100" value="1" Unit="deg"/>
      </value>
   </unit>

   <unit xmlns="" Code="%[slope]" CODE="%[SLOPE]" isMetric="no" isSpecial="yes"
         class="clinical">
      <name>percent of slope</name>
      <printSymbol>%</printSymbol>
      <property>slope</property>
      <value Unit="100tan(1 rad)" UNIT="100TAN(1 RAD)">
         <function name="100tan" value="1" Unit="deg"/>
      </value>
   </unit>

The two last units above are interesting as it seems that their function names are inconsistent (100tan vs tanTimes100). Apart from that, the unit inside <function> is "deg" but should be "rad" I guess. I had a look at the latest ucum xml file version 2.0.1 and it's still the same. Maybe this should be reported to the UCUM guys.

EDIT: Just opened a ticket for that on UCUM's trac.

Remaining units:

   <unit xmlns="" Code="[hp'_X]" CODE="[HP'_X]" isMetric="no" isSpecial="yes"
         class="clinical">
      <name>homeopathic potency of decimal series (retired)</name>
      <printSymbol>X</printSymbol>
      <property>homeopathic potency (retired)</property>
      <value Unit="hpX(1 1)" UNIT="HPX(1 1)">
         <function name="hpX" value="1" Unit="1"/>
      </value>
   </unit>

   <unit xmlns="" Code="[hp'_C]" CODE="[HP'_C]" isMetric="no" isSpecial="yes"
         class="clinical">
      <name>homeopathic potency of centesimal series (retired)</name>
      <printSymbol>C</printSymbol>
      <property>homeopathic potency (retired)</property>
      <value Unit="hpC(1 1)" UNIT="HPC(1 1)">
         <function name="hpC" value="1" Unit="1"/>
      </value>
   </unit>

   <unit xmlns="" Code="[hp'_M]" CODE="[HP'_M]" isMetric="no" isSpecial="yes"
         class="clinical">
      <name>homeopathic potency of millesimal series (retired)</name>
      <printSymbol>M</printSymbol>
      <property>homeopathic potency (retired)</property>
      <value Unit="hpM(1 1)" UNIT="HPM(1 1)">
         <function name="hpM" value="1" Unit="1"/>
      </value>
   </unit>

   <unit xmlns="" Code="[hp'_Q]" CODE="[HP'_Q]" isMetric="no" isSpecial="yes"
         class="clinical">
      <name>homeopathic potency of quintamillesimal series (retired)</name>
      <printSymbol>Q</printSymbol>
      <property>homeopathic potency (retired)</property>
      <value Unit="hpQ(1 1)" UNIT="HPQ(1 1)">
         <function name="hpQ" value="1" Unit="1"/>
      </value>
   </unit>

   <unit xmlns="" Code="[pH]" CODE="[PH]" isMetric="no" isSpecial="yes" class="chemical">
      <name>pH</name>
      <printSymbol>pH</printSymbol>
      <property>acidity</property>
      <value Unit="pH(1 mol/l)" UNIT="PH(1 MOL/L)">
         <function name="pH" value="1" Unit="mol/l"/>
      </value>
   </unit>

   <unit xmlns="" Code="Np" CODE="NEP" isMetric="yes" isSpecial="yes" class="levels">
      <name>neper</name>
      <printSymbol>Np</printSymbol>
      <property>level</property>
      <value Unit="ln(1 1)" UNIT="LN(1 1)">
         <function name="ln" value="1" Unit="1"/>
      </value>
   </unit>

   <unit xmlns="" Code="B" CODE="B" isMetric="yes" isSpecial="yes" class="levels">
      <name>bel</name>
      <printSymbol>B</printSymbol>
      <property>level</property>
      <value Unit="lg(1 1)" UNIT="LG(1 1)">
         <function name="lg" value="1" Unit="1"/>
      </value>
   </unit>

   <unit xmlns="" Code="B[SPL]" CODE="B[SPL]" isMetric="yes" isSpecial="yes"
         class="levels">
      <name>bel sound pressure</name>
      <printSymbol>B(SPL)</printSymbol>
      <property>pressure level</property>
      <value Unit="2lg(2 10*-5.Pa)" UNIT="2LG(2 10*-5.PAL)">
         <function name="lgTimes2" value="2" Unit="10*-5.Pa"/>
      </value>
   </unit>

   <unit xmlns="" Code="B[V]" CODE="B[V]" isMetric="yes" isSpecial="yes" class="levels">
      <name>bel volt</name>
      <printSymbol>B(V)</printSymbol>
      <property>electric potential level</property>
      <value Unit="2lg(1 V)" UNIT="2LG(1 V)">
         <function name="lgTimes2" value="1" Unit="V"/>
      </value>
   </unit>

   <unit xmlns="" Code="B[mV]" CODE="B[MV]" isMetric="yes" isSpecial="yes" class="levels">
      <name>bel millivolt</name>
      <printSymbol>B(mV)</printSymbol>
      <property>electric potential level</property>
      <value Unit="2lg(1 mV)" UNIT="2LG(1 MV)">
         <function name="lgTimes2" value="1" Unit="mV"/>
      </value>
   </unit>

   <unit xmlns="" Code="B[uV]" CODE="B[UV]" isMetric="yes" isSpecial="yes" class="levels">
      <name>bel microvolt</name>
      <printSymbol>B(&#956;V)</printSymbol>
      <property>electric potential level</property>
      <value Unit="2lg(1 uV)" UNIT="2LG(1 UV)">
         <function name="lgTimes2" value="1" Unit="uV"/>
      </value>
   </unit>

   <unit xmlns="" Code="B[10.nV]" CODE="B[10.NV]" isMetric="yes" isSpecial="yes"
         class="levels">
      <name>bel 10 nanovolt</name>
      <printSymbol>B(10 nV)</printSymbol>
      <property>electric potential level</property>
      <value Unit="2lg(10 nV)" UNIT="2LG(10 NV)">
         <function name="lgTimes2" value="10" Unit="nV"/>
      </value>
   </unit>

   <unit xmlns="" Code="B[W]" CODE="B[W]" isMetric="yes" isSpecial="yes" class="levels">
      <name>bel watt</name>
      <printSymbol>B(W)</printSymbol>
      <property>power level</property>
      <value Unit="lg(1 W)" UNIT="LG(1 W)">
         <function name="lg" value="1" Unit="W"/>
      </value>
   </unit>

   <unit xmlns="" Code="B[kW]" CODE="B[KW]" isMetric="yes" isSpecial="yes" class="levels">
      <name>bel kilowatt</name>
      <printSymbol>B(kW)</printSymbol>
      <property>power level</property>
      <value Unit="lg(1 kW)" UNIT="LG(1 KW)">
         <function name="lg" value="1" Unit="kW"/>
      </value>
   </unit>

   <unit xmlns="" Code="bit_s" CODE="BIT_S" isMetric="no" isSpecial="yes"
         class="infotech">
      <name>bit</name>
      <printSymbol>bit<sub>s</sub>
      </printSymbol>
      <property>amount of information</property>
      <value Unit="ld(1 1)" UNIT="ld(1 1)">
         <function name="ld" value="1" Unit="1"/>
      </value>
   </unit>

In the latest UCUM release, there's also the following function-defined unit:

   <unit Code="[m/s2/Hz^(1/2)]" CODE="[M/S2/HZ^(1/2)]" isMetric="no" isSpecial="yes"
         class="misc">
      <name>meter per square seconds per square root of hertz</name>
      <printSymbol/>
      <property>amplitude spectral density</property>
      <value Unit="sqrt(1 m2/s4/Hz)" UNIT="SQRT(1 M2/S4/HZ)">
         <function name="sqrt" value="1" Unit="m2/s4/Hz"/>
      </value>
   </unit>

[govpack]

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