How to make a 2-D colormap with coordinates

10 次查看（过去 30 天）
andres
andres 2018-10-22
评论： andres 2018-10-25
Hi. I have n points, for each point I have its latitud, longitude and an indicator that take real values (from 0.5 to 2.7). I would like to make a Figure (like a colormap) that shows with colors the value of this indicator for each of these n points. Is that possible? Thanks in advance for any help.

请先登录，再回答此问题。

采纳的回答

andres
andres 2018-10-25
Finally it was better to use scatter. Thank you very much anyway!
  3 个评论
显示 1更早的评论
jonas
jonas 2018-10-25
That's fine! If he found a better solution then it's better to accept that one, as it may help others find the best solution in the future :)
Upon re-reading the question, I don't know why scatter was not my go-to suggestion.
andres
andres 2018-10-25
That is what I thought. Of course I appreciate the help (and I thanked in the original answer), but if someone has the same question in the future, it is better for him/her to know which solution was the one that worked for me better. Regards!

请先登录，再进行评论。

更多回答（1 个）

jonas
jonas 2018-10-22
编辑：jonas 2018-10-22
Use a surface object
surf(lon, lat, z)
The data must be gridded, so you may have grid the data like this
[LON,LAT] = meshgrid(min(lon):max(lon), min(lat) :max(lat))
Z = griddata(lon,lat, z, LON, LAT)
surf(LON, LAT, Z)
  2 个评论
andres
andres 2018-10-22
编辑：andres 2018-10-22
But "surf" makes 3-D images, doesn't it? I need it to be 2D (sorry I did not put that in the text, but only in the title). As points come from geographical data (lon lat), I want a "map" representation with colors indicating the value of z.
jonas
jonas 2018-10-22
just set the view,
view([0 90])
or use one of the following functions with the same syntax as surf
  • pcolor
  • imagesc
  • contourf
  • mesh

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Geographic Plots 的更多信息

标签

产品


版本

R2015b

Community Treasure Hunt

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

Start Hunting!

Translated by