mirror of https://github.com/rm-dr/daisy
86 lines
2.8 KiB
Markdown
86 lines
2.8 KiB
Markdown
|
|
|
|
A high-precision scientific calculator with support for units, derivatives, and more.
|
|
|
|
Many features are missing, this is still under development.
|
|
|
|
**Web demo: [here](https://daisy.betalupi.com) (won't work on mobile)**
|
|
|
|
# 📦 Installation
|
|
- **From source:** `cargo build --release`, binary will be at `./target/release/daisy`
|
|
- **Cargo:** `cargo install daisycalc`
|
|
- **Arch:** `yay -S daisy`
|
|
- **Debian:** coming soon
|
|
- **Nix:** Use `default.nix`. Daisy isn't in nixpkgs yet, you'll need to add something like the following to `configuration.nix`:
|
|
|
|
```nix
|
|
let
|
|
daisy = builtins.fetchGit {
|
|
url = "https://github.com/rm-dr/daisy.git";
|
|
ref = "master";
|
|
} + /default.nix;
|
|
in
|
|
{
|
|
environment.systemPackages = with pkgs; [
|
|
(callPackage daisy { })
|
|
];
|
|
}
|
|
```
|
|
|
|
# 📹 Screenshot
|
|
|
|
|
|
|
|
# 🛠️ Features
|
|
- Open-source
|
|
- Carefully designed and easy-to-read prompt
|
|
- Supports many physical units, with metric and binary prefixes
|
|
- Supports exponential notation
|
|
- Clear syntax, parsed input is always re-printed as a sanity check.
|
|
- Useful, detailed error messages
|
|
|
|
|
|
# 📑 Usage
|
|
|
|
All documentation is built into the prompt. Use the `help` command to view it.
|
|
|
|
## Evaluate expressions:
|
|
- Basic math: ``103 / 2 * 43``
|
|
- Functions: ``sqrt(1.4^3 + 4) * sin(pi / 4)``
|
|
- Scientific notation: ``1.2e12 * 1e-5``
|
|
|
|
## Physical units
|
|
- Unit operations: ``2 day + 1 hour``
|
|
- Unit conversion: ``2 day + 1 hour to minutes``
|
|
- Compound units: ``10 m/s to mph``
|
|
- Conversion errors: ``1 liter to volt``
|
|
|
|
## Varables
|
|
- Previous answer: `ans + 2`
|
|
- Variable assignment: `a = 143`
|
|
|
|
|
|
# 🌹 Additional Notes
|
|
|
|
## Unit Conversion
|
|
|
|
The conversion operator `to` converts its left argument to the *unit* of its right argument, ignoring its value. For example, `5m to mi` and `5m to 10mi` are identical.
|
|
|
|
|
|
## Celsius and Fahrenheit
|
|
|
|
Celsius and Fahrenheit are not supported as first-class units because they require an offset when converting from other temperature units. This leads to ambiguity when adding units, since one temperature must be seen as a *difference* rather than an absolute temperature.
|
|
|
|
Daisy instead provides four functions (`fromCelsius`, `toCelsius`, `fromFahrenheit`, `toFahrenheit`) which convert between scalars and Kelvin.
|
|
- "from" functions take a scalar and return a value in Kelvin: `fromCelsius(0) = 273.15K`
|
|
- "to" functions take a value in Kelvin and return a scalar: `toCelsius(273.15 K) = 0`
|
|
|
|
Functions `FtoC` and `CtoF` are also provided:
|
|
- `FtoC(x) = toCelsius(fromFahrenheit(x))`
|
|
- `CtoF(x) = toFahrenheit(fromCelsius(x))`
|
|
|
|
|
|
## Multiplication Order
|
|
|
|
Implicit multiplication has a higher priority than division. `pi/2 radians` will parse as `pi/(2 radians)`. Type `(pi/2) radians` or `pi/2 * radians` to get 90 degrees.
|