Hello, i'd like to inform you about the first announced version of CalDims. Its website is in the haskellwiki: http://www.haskell.org/haskellwiki/CalDims CalDims is a calculation tool with the following features: * Support for user defined basic units and derrived units * user defined functions * work sheets can be modified/saved via shell * (1/3)*3 == 1 (No rounding errors) * built-in feature to simplify units * easy unit-conversion Useful hints: * to compile just type `make` and then (optionally) 'make install' as superuser. * to read documentation, start the program and then enter `\?` Future: Short term goal is to provide a stable release so please report all bugs and quirks. For the next major release I am planning to write a worksheet GUI for CalDims + support more datatypes. Here's an example session: /home/schneegloeckchen# caldims CalDims 1.0-rc1 Version: GPL 2 (see the LICENSE file) Type in `\?' to read the inline help.

# A 60 Watt electric light is burning 2 hours a day. How much energy is consumed in one week? 60 W * 2 h / d * 7 d 3024000.0 J # What's that in Watt hours? 60 W * 2 h / d * 7 d | W h 840.0 W h #How much kWh is it in a year (we derrive `year` and `kW` first) year := 365 d New unit year:d ok. kW := 1000 W New unit kW:W ok. 60 W * 2 h / d * 1 year | kW h 43.8 h kW #Define new basic dimension for currency + variable for energy price \u USD Added basic unit `USD'. energy_price = 0.2 USD / kW / h New function energy_price:USD / kW / h ok. 43.8 kW h * energy_price 8.76 USD #A simple function for energy costs energy_costs (t : s, e:W) = t*e*energy_price New function energy_costs:USD W s / kW / h ok. energy_costs (20 min, 60 kW) 4.0 USD #Save everything (units, functions) to a file \s my_calculation.cal

schneegloeckchen