Physical units/CalDims
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Categories: Applications | Mathematics
The motivation for writing CalDims was to have an easy to use calculation tool that has support for units.
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1 The calculator's 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
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2 Example session
> # A bird is moving 1 meter per second, how far will it be in 2 hours? > 1m/s * 2h | m 7200 m > # 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 | J 3024000 J > # What's that in Watt hours? > 60 W * 2 h / d * 7 d | W h 840 W h > #How much is it in a year (we derrive `year` first) > year := 265 d ok. > 60 W * 2 h / d * 1 year | W h 31799.999999999996 W h > # Bits and bytes are not defined. We do so: > \u bit ok, but an object has changed > byte := 8 bit ok, but an object has changed > kbyte := 1024 byte ok. > mbyte := 1024 kbyte ok. > 2 mbyte | - 16777216 bit > 2 mbyte | kbyte 2048 kbyte
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