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Additional QuantityArray constructions #178

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392701a
first pass
icweaver May 31, 2025
2feea5c
added some usage docs
icweaver Jun 3, 2025
b84257e
added ref link between Home and Examples pages
icweaver Jul 12, 2025
2c27270
updated QuantityArray docstring to include convenience method
icweaver Jul 12, 2025
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18 changes: 17 additions & 1 deletion README.md
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Expand Up @@ -321,7 +321,7 @@ julia> ustrip(ua"degC", 295.15u"K")
22.0
```

### Arrays
### [Arrays](@id home_arrays)

For working with an array of quantities that have the same dimensions,
you can use a `QuantityArray`:
Expand Down Expand Up @@ -364,6 +364,22 @@ julia> @btime $f.(qa) setup=(xa = randn(100000) .* u"km/s"; qa = QuantityArray(x

So we can see the `QuantityArray` version saves on both time and memory.

By default, DynamicQuantities will create a `QuantityArray` from an `AbstractArray`, similarly to how a `Quantity` is created from a scalar in the [Usage](@ref) examples:

```@repl quantity-array
using DynamicQuantities # hide

x = [0.3, 0.4, 0.5]u"km/s"

y = (42:45) * u"kg"
```

This can be overridden to produce a vector of `Quantity`s by explicitly broadcasting the unit:

```@repl quantity-array
z = [0.3, 0.4, 0.5] .* u"km/s"
```

### Unitful

DynamicQuantities allows you to convert back and forth from Unitful.jl:
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3 changes: 3 additions & 0 deletions docs/src/examples.md
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Expand Up @@ -246,6 +246,7 @@ the same dimension) by passing an array and a single quantity:

```julia
x = QuantityArray(randn(32), u"km/s")
# or x = randn(32)u"km/s"
```

or, by passing an array of individual quantities:
Expand Down Expand Up @@ -281,6 +282,8 @@ f_square(v) = v^2 * 1.5 - v^2
println("Applying function to y_q: ", sum(f_square.(y_q)))
```

See [Home > Arrays](@ref home_arrays) for more.

### Fill

We can also make `QuantityArray` using `fill`:
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