scalanlp/breeze

support hdf4/5 input/output

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#42 opened on Apr 3, 2013

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 (1 comment) (0 reactions) (0 assignees)Scala (3,453 stars) (690 forks)batch import
enhancementhelp wantedproject

Description

There is a JNI-based impemlemtation here: http://www.hdfgroup.org/hdf-java-html/hdf-object/index.html, but I'd rather not use it if there's a pure java implementation. This is what Saddle uses, though.

Quick googling suggests there's no pure java implementation.

Contributor guide

Tech stack
java
Domain
data
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
5
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
HDF4/5 format knowledgeJava or Scala programmingBreeze library basicsJNI or data serialization
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
15
Research direction
Investigate the referenced HDF Java library at http://www.hdfgroup.org/hdf java html/hdf object/index.html. Determine if a pure Java implementation exists or if JNI is necessary. Evaluate the feasibility of integrating HDF I/O into Breeze's existing data structures. Check if there are any ongoing efforts or forks that address this feature.