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@@ -2,7 +2,7 @@
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<h1>Numbat</h1>
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-**[Features] • [Documentation] • [Tutorial] • [Syntax reference] • [Installation] • [Development]**
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+**[Documentation] • [Tutorial] • [Syntax reference] • [Installation] • [Development]**
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<img src="assets/numbat-410.png">
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@@ -47,7 +47,8 @@ Numbat is focused on computations with units. Units are therefore treated as fir
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[entered in various ways](https://numbat.dev/doc/unit-notation.html) (`km/h` or `kilometer/hour`, `GiB` or
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`gibibytes`, `°` or `degree`, `m²` or `m^2`).
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New (helper) units can be [introduced](https://numbat.dev/doc/unit-definitions.html) on the spot (`unit pixel`).
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-Compatible units can be converted [using the `->` operator](https://numbat.dev/doc/unit-conversions.html).
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+Compatible units can be converted easily [using the `->` operator](https://numbat.dev/doc/unit-conversions.html) (`30 km/h -> mph`, `1 mrad -> degree`, `5 in + 2 ft -> cm`, `27 weeks -> days`).
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+And unit expressions are simplified using various heuristics (`15 km/h * 30 min = 7.5 km`).
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</details>
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<details>
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@@ -78,8 +79,7 @@ This means you will either get a (descriptive) error message, or you can trust t
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</summary>
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<p></p>
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-Numbat aims to provide descriptive and helpful error messages:
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-<img src="assets/numbat-error.png" width="500">
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+Numbat aims to provide [descriptive and helpful error messages](https://github.com/sharkdp/numbat/blob/master/assets/numbat-error.png).
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</details>
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<details>
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@@ -106,6 +106,20 @@ a single line (`unit bathtub = 150 L`) is usually enough to add a new unit. User
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own `prelude` module, allowing for arbitrary modifications to the unit system.
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</details>
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+<details>
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+<summary>
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+<b>Non-features</b>
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+</summary>
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+<p></p>
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+
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+Numbat is a scientific calculator. It's not a computer algebra system that solves differential equations
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+or computes intergrals. Try [WolframAlpha](http://www.wolframalpha.com/) instead. There is no graphical
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+user interface with buttons like `x²`, `1/x` or `DEG/RAD`. [Qalculate!](http://qalculate.github.io/) is a
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+fantastic tool that supports both text as well as graphical input. Numbat supports a huge range of physical
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+units. If you need something even more comprehensive, please consider contributing. Or try
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+[GNU units](https://www.gnu.org/software/units/).
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+
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+</details>
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David Peter