Matrix sum along a dimension is defined to return a `MathScalarType`, but might return higher dimension

描述

const mat = math.matrix([[1,2,3],[4,5,6]])
console.log(math.sum(mat, 0))

> DenseMatrix { _data: [ 5, 7, 9 ], _size: [ 3 ], _datatype: undefined }

贡献者指南

技术栈

javascript

领域

api

议题类型

bug

难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。

3

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1-3 hours

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blocked

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clear

前置要求

Basic JavaScript knowledgeUnderstanding of matrix operationsFamiliarity with math.js types

新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。

50

研究方向

The bug is in the type signature of the sum function in mathjs. The issue likely requires updating the return type in the TypeScript declaration file (if any) or the JSDoc comment in the source file (e.g., src/type/matrix/function/sum.js). The code currently returns the result of math.sum which may be a DenseMatrix instead of a scalar. To fix, the function should return a MathGenericType or similar that accounts for multidimensional arrays. The existing tests in the test directory may need to be updated to cover this case. No linked PRs yet; the assignee may be working on a fix.