scalanlp/breeze

Contour plots

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#365 opened on Feb 15, 2015

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Description

Hi @dlwh,

is it possible to draw contour plots like in octave, e.g. contour(u, v, z, [0, 0], 'LineWidth', 2)? I wanted to draw a polynomial decision boundary for logistic regression with scala/breeze like this: bildschirmfoto 2015-02-15 um 22 36 54

The scatter plot for the data works fine, but I cant find a way to plot such a decision boundary.

Many thanks in advance!

Contributor guide

Research direction
Examine the existing breeze viz module to understand how plots are rendered. Look for examples of line or scatter plots, then determine if contour plots can be added using the underlying library (e.g., JFreeChart) or by integrating a new library. Implement a contour function similar to Octave's.
Tech stack
scala
Domain
api
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
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
Scala
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40