scalanlp/breeze

Missing Transpose(DenseVector)*CSC operation?

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#715 opened on Jun 20, 2018

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 (1 comment) (2 reactions) (0 assignees)Scala (690 forks)batch import
good first issue

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Description

Hello!

I have a CSC sparse matrix and a DenseVector. I want to do the operation transpose(DenseVector)*CSCMatrix, which should yield a Transpose(DenseVector). As far as I could see, this method is not implemented. This seems implemented for transpose(SparseVector)CSCMatrix (method canMulSVt_CSC_eq_SVt in CSCMatrixOps.scala ), but I could not find a DenseCSC method. Can someone confirm this implementation is not present in Breeze? If so I add it

cheers

Contributor guide

Research direction
Inspect the existing method `canMulSVt CSC eq SVt` in CSCMatrixOps.scala to understand the pattern, then implement a similar method for transpose(DenseVector) * CSCMatrix.
Tech stack
scala
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Scala
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
55