sgilmore10 opened a new pull request, #35562:
URL: https://github.com/apache/arrow/pull/35562
> **Warning** This pull request is dependent upon #35556. We will rebase and
mark as ready for review once that one is merged.
### Rationale for this change
Followup to #35495 in which we added the MATLAB class `Float32Array`.
This pull request adds support for round tripping signed integer between
`arrow.array.<Type>Array` classes and associated MATLAB types (e.g. `uint8`,
`uint16`, `uint32`, `uint64`).
| Arrow Array Type | MATLAB Type |
| ----------------- | -------------- |
| `UInt8Array` | `uint8`|
| `UInt16Array` | `uint16`|
| `UInt32Array` | `uint32`|
| `UInt64Array` | `uint64`|
Example of round-tripping `uint8` data:
```matlab
>> uint8MATLABArray = uint8([1 2 3]')
uint8MATLABArray =
3×1 uint8 column vector
1
2
3
>> uint8ArrowArray = arrow.array.UInt8Array(uint8MATLABArray)
uint8ArrowArray =
[
1,
2,
3
]
>> uint8MATLABArrayRoundTripped = toMATLAB(uint8ArrowArray)
uint8MATLABArrayRoundTripped =
3×1 uint8 column vector
1
2
3
>> all(uint8MATLABArray == uint8MATLABArrayRoundTripped)
ans =
logical
1
```
### What changes are included in this PR?
Added four new unsigned integer type `arrow.array.<Array>` concrete
subclasses.
1. `arrow.array.UInt8Array`
2. `arrow.array.UInt16Array`
3. `arrow.array.UInt32Array`
4. `arrow.array.UInt64Array`
### Are these changes tested?
Yes, we added the following four test classes:
1. `tUInt8Array.m`
2. `tUInt16Array.m`
3. `tUInt32Array.m`
4. `tUInt64Array.m`
### Are there any user-facing changes?
Yes. This change introduces 4 new publicly documented classes:
1. `arrow.array.UInt8Array`
2. `arrow.array.UInt16Array`
3. `arrow.array.UInt32Array`
4. `arrow.array.UInt64Array`
### Future Directions
1. Add support for null values (i.e. validity bitmap) for the unsigned
integer array types.
### NOTES
1. Thank you to @kevingurney for his help with this PR!
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