Conformability Error Units

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of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise gnu units to the top Why do I get a 'conformability error' when I attempt to convert water in GNU units? up vote 4 down vote favorite I've been using the GNU units program and I seem to think that I should be able to convert water between a volume and a weight. Examples: You have: 1 gram water You want: cm^3 conformability error 1 gram water = 9.80665 kg^2 / m^2 s^2 cm^3 = 1e-06 unit conversion m^3 and You have: 1 gallon water You want: pounds conformability error 1 gallon water = 37.122208 kg m / s^2 pounds = 0.45359237 kg utilities share|improve this question edited Jun 27 '11 at 19:56 Caleb 38.9k5106147 asked Jun 27 '11 at 18:08 brianegge 1234 add a comment| 2 Answers 2 active oldest votes up vote 5 down vote accepted The water unit is the specific weight of water at the standard temperature of 0°C. A cm water is a unit of pressure, like the cm Hg. You have: water You want: Definition: gram force/cm^3 = 9806.65 kg / m^2 s^2 You have: 1cm Hg You want: cm water * 13.5951 / 0.073555914 A gram water is a unit of mass times pressume divided by length, which I don't recognize as a common physical quantity. Units has waterdensity defined to be the density of water at 4°C and 1atm, which is (to a very good precision) 1kg/m³. You have: 1g/waterdensity You want: cm^3 * 1 / 1 If you want density in other conditions or of other materials, either type out the constant or put it in your own unit definition file (units -f '' -f ~/.units.data). share|improve this answer answered Jun 27 '11 at 21:07 Gilles 369k676711119 add a comment| up vote 2 down vote Technically speaking, you're trying t

Platform Included with some Linux distributions. Two Windows binary distributions are available; distribution for other platforms is source only. Type Utility License GPLv3 Website Official website Free software portal GNU Units is a cross-platform computer program for conversion of units of quantities. It has a database of measurement units, including esoteric and historical units. This for instance allows conversion of velocities specified in furlongs per fortnight, and pressures specified in tons per acre. Output units are checked for consistency with the http://unix.stackexchange.com/questions/15710/why-do-i-get-a-conformability-error-when-i-attempt-to-convert-water-in-gnu-uni input, allowing verification of conversion of complex expressions. Contents 1 History 1.1 units (Unix utility) 1.2 The GNU implementation 1.3 Other implementations 1.4 Version history 2 Usage 3 Examples 3.1 Interactive mode 3.2 On the command line (non-interactive) 3.3 Complex units expressions 4 References 5 External links History[edit] GNU Units was written by Adrian Mariano as an implementation https://en.wikipedia.org/wiki/GNU_Units of the units utility included with the Unix operating system. It was originally available under a permissive license. The GNU variant is distributed under the GPL although the FreeBSD project maintains a free fork of units from before the license change. units (Unix utility)[edit] The original units program has been a standard part of Unix since the early Bell Laboratories versions.[1] Source code for a version very similar to the original is available from the Heirloom Project. [2] The GNU implementation[edit] GNU units includes several extensions to the original version,[3] including Exponents can be written with ^ or **. Exponents can be larger than 9 if written with ^ or **. Rational and decimal exponents are supported. Sums of units (e.g., btu + ft lbf) can be converted. Conversions can be made to sums of units, termed unit lists (e.g., from degrees to degrees, minutes, and seconds). Units that measure reciprocal dimensions can be converted (e.g., S to megohm). Parentheses for grouping are supported. This sometimes allows more nat

Sums and Differences of Units 5.3 Numbers as Units 5.4 Built-in Functions 5.5 Previous Result 5.6 Complicated Unit Expressions 5.7 Backwards Compatibility: ‘*’ https://www.gnu.org/software/units/manual/units.html and ‘-’ 6 Nonlinear Unit Conversions 6.1 Temperature Conversions 6.2 Other Nonlinear http://noone.org/blog/English/Computer/Debian/CoolTools/units.html Units 7 Unit Lists: Conversion to Sums of Units 8 Logging Calculations 9 Invoking units 10 Adding Your Own Definitions 10.1 Units Data Files 10.2 Defining New Units and Prefixes 10.3 Defining Nonlinear Units 10.4 Defining Piecewise Linear Units 10.5 Defining Unit List Aliases 11 Numeric conformability error Output Format 11.1 Format Specification 11.2 Flags 11.3 Field Width 11.4 Precision 12 Localization 12.1 Locale 12.2 Additional Localization 13 Environment Variables 14 Data Files 15 Unicode Support 16 Readline Support 17 Updating Currency Exchange Rates 18 Database Command Syntax 19 GNU Free Documentation License Index Next: Overview, Up: (dir) [Contents][Index] Units Conversion This manual describes the units conformability error units command for units conversion and how you can use it as a powerful scientific calculator that keeps track of units. This is Edition 2.11 of The Units Conversion Manual for units Version 2.12. • Overview:What does units do? • Interactive Use:How to use units. • Command Line Use:How to use units non-interactively. • Unit Definitions:What units are defined? • Unit Expressions:Forming compound units. • Nonlinear Conversions:Nonlinear unit conversions (e.g., temperature). • Unit Lists:Conversion to sums of units (e.g., feet and inches). • Logging Calculations:Logging conversions and calculations in a file. • Invoking Units:Command line options. • Defining Your Own Units:Adding your own unit definitions • Numeric Output Format:How to change the output format • Localization:How to define and use regional unit names. • Environment Vars:Environment variables used by units. • Data Files:Descriptions and locations of units data files. • Unicode Support:Support for Unicode (UTF-8). • Readline Support:Unit name completion and editing. • Currency:Updating currency exchange rates. • Database Syntax:Summary of database command syntax. • GNU Free Documentation License:License. • Index:General index. Next: Interactiv

seamiles into kilometres? Use units: $ units 2411 units, 71 prefixes, 33 nonlinear units You have: 10 seamiles You want: km * 18.288 / 0.054680665 You have: ^C $ Of course this is interactive. There's also a non-interactive mode: $ units '10 seamiles' 'km' * 18.288 / 0.054680665 $ The line with the asterisk means that 10 seamiles are 18.288 kilometres or 1 kilometre is the 0.054680665th part of 10 seamiles. This quite non-intuitive output is caused by the fact that unit is designed to be used with units only: $ units seamiles km * 1.8288 / 0.54680665 $ Now this makes more sense: You have to multiply seamiles with 1.8288 to get kilometres and you have to multiply (not divide) kilometres with 0.54something to get seamiles. But this output is still a little bit cumbersome, and annoying if you want to use it in shell scripts. But for luck, units knows some nice options, especially "-v" ("-verbose") and "-t" ("-terse"): $ units -v '10 seamiles' km 10 seamiles = 18.288 km 10 seamiles = (1 / 0.054680665) km $ units -t '10 seamiles' km 18.288 Now that's way easier to read and script! You can also script more complex things like $ units -v '100 attoparsec/microfortnight' m/s 100 attoparsec/microfortnight = 2.5509901 m/s 100 attoparsec/microfortnight = (1 / 0.39200466) m/s Unfortunately not all common units are unambiguous for units: units -v '100 km/h' m/s conformability error 100 km/h = 1.5091905e+38 s / kg m m/s = 1 m / s Well, "h" seems not to be units unit for "hours", so lets tell it explicity that we want km per hour: units -v '100 km/hour' m/s 100 km/hour = 27.777778 m/s 100 km/hour = (1 / 0.036) m/s Looks more like what I expected. "units" behaves though a little bit strange when I try to convert litres per 100 kilometres into miles per gallon: $ units -t '6L/100km' 'mpg' conformability error 6e-08 m^2 425143.71 / m^2 $ Interestingly changing the verbosity helps already in this case: $ units -v '6L/100km' 'mpg' reciprocal conversion 1 / (6L/100km) = 39.202431 mpg 1 / (6L/100km) = (1 / 0.025508622) mpg Greetings from the Debian booth at LinuxDay.at and thanks to Y_Plentyn, rhalina and bzed for example ideas and the suggestion to write a blog posting about units. :-) Filed under: Blogging is futile » English » Computer » Debian » CoolTools » Tagged as: bzed, CLI, conversion, LinuxDay.at, rhalina, units, UUUT, Y_Plentyn 4 comments // show without comments // write a comment Related stories UUUT (3 shared tags) netmask-prips (2 shared tags) ipcalc-sipcalc (2 shared tags) abe@debian.org (2 shared tags) swaks (2 shared tags) Tag Cloud 2CV, aha, Apache, APT, aptitud