MATLAB Answers

Colorbar for categorical data

51 views (last 30 days)
Claire on 2 Apr 2014
Commented: Image Analyst on 3 Apr 2014
I have a spatial, categorical dataset that I have plotted up using pcolor. The dataset contains latitude, longitude and vegetation type data. Vegetation type is an arbitrary number between 1 and 19 that corresponds to a vegetation label.
I am looking for a way to create a colorbar "legend" for this data.
At the moment, when I use pcolor and add a colorbar, I get a bar that goes from 1 - 19 with all the different colours in between. This colorbar means nothing because the data are not ordinal.
I am hoping to find a way to make little boxes for each individual color, and put a label next to the box. Something like the maps of Australia seen on this site
Is there a way to code this in Matlab, given that I have 19 different vegetation types, and putting labels next to the colorbar would be too busy?
Thanks for your help.

Accepted Answer

Image Analyst
Image Analyst on 2 Apr 2014
Have you seen the demo for colorbar where they change the labels from numbers to some custom words? Try that:
Image Analyst
Image Analyst on 3 Apr 2014
If you're going to have 19 segments over a screen size, or a certain height on the paper, then the only way is to have the font size be smaller. Do you not consider your example to be a mess? Why not? Because the letters are separated? Well they are small font sizes - it's a tradeoff.

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by