How to set log intervals on a logscaled colorbar ?

10 次查看（过去 30 天）
Benjamin
Benjamin 2022-8-24
评论： Dyuman Joshi 2023-9-1
Hello everyone !
I'm plotting some values on graph (with scatter), and the 'ColorScale' of my colorbar is set to 'log', like this :
I want to reduce the number of 'colors' of the colormap jet to better segment my data.
Ideally I want to segment according to log ticks of the colorbar, but I only achieve to get a linear segmentation on a log colorbar :
Is there a way to fullfill my desire ?
Thank you in advance !
Ben

请先登录，再回答此问题。

回答（1 个）

Nivedita
Nivedita 2023-9-1
Ran in:
Hi Benjamin!
I understand that you are trying to achieve the segmentation of your colorbar according to logscale and have the log ticks appear at the segments.
I have tried to implement the above requirement using random data in the following piece of code:
% Set the colormap and its logarithmic segmentation
cmap = jet(5); % Choose any colormap you prefer and specify the number of segments
numTicks = 6; % Number of colorbar ticks
c = colorbar;
c.Ticks = [1 10 100 1000 10000 100000];
c.TickLabels = cellstr(num2str(c.Ticks'));
colormap(cmap);
clim([1, 100000]);
set(gca, 'ColorScale','log');
  • You can determine the custom colormap that you wish to use in your colorbar. The various colormap options available can be found in the documentation link here: Colormap Name.
  • In the example provided I have used the colormap named “jet” and specified the number of segments that I require in the following brackets.
  • I have then set the number of tick values to 6 (for 5 segments), specified the tick values and the tick labels. For more details on Colorbar properties, you can refer to the documentation here: Colorbar appearance and behavior - MATLAB
  • I have set the colormap limits using the “clim” function and finally in the last line, set the “ColorScale” to “log” as mentioned.
I hope it helps!

类别

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

标签

产品


版本

R2022a

Community Treasure Hunt

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

Start Hunting!

Translated by