Re: Re: Re: Re: Newly Released Mathematica 5.1 Delivers Unmatched Performance for Handling Data

*To*: mathgroup at smc.vnet.net*Subject*: [mg52408] Re: [mg52396] Re: Re: Re: Newly Released Mathematica 5.1 Delivers Unmatched Performance for Handling Data*From*: "David Park" <djmp at earthlink.net>*Date*: Fri, 26 Nov 2004 01:04:38 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

John, I was thinking of angular measurement. The following works... Needs["Miscellaneous`Units`"] Convert[(Pi/4)*Radian, °] 45 ° but the following, using an approximate value, does not work because Degree immediately multiplies out undoing the conversion. Convert[1.35 Radian, °] 1.35 The ExtendUnits package at my web site fixes this but at the expense of putting a HoldForm on the degree symbol. Needs["Miscellaneous`V4ExtendUnits`"] 1.35 Radian // ToUnit[°] % // FullForm 77.3493 ° Times[77.34930234266115`, HoldForm[Degree]] Since I generally consider value substitution and unit conversion as the last step in a physical calculation this is not a huge problem. Still it would be nice if units and numerical constants had different names. David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: John Jowett [mailto:John.Jowett at cern.ch] To: mathgroup at smc.vnet.net I'm not sure that it is necessary to have a unit Degree as Kelvin is already there and is used, e.g., in the definition of BoltzmannConstant. The Miscellaneous`Units` has a special handling of temperature scales (ConvertTemperature) that are not proportional to each other like other units. It seems a bit clumsy but I don't have much occasion to use it myself. Otherwise Convert[5 Fahrenheit, Kelvin] returns something that might be considered reasonable, with a warning message. "David Park" <djmp at earthlink.net> wrote in message news:co1ejp$shb$1 at smc.vnet.net... > John, > > Your idea about non-conflicting color names seems good. Also there should be > a unit Degree and a different name for the numerical constant. >