zoom scatter dots inside a figure

3 次查看（过去 30 天）
mat
mat 2013-7-16
编辑： Samayochita 2025-2-14
hi,
zooming into a figure does not correspondingly enlarge the scatter dots in the figure (for example).
is there an elegant way of doing it?
thanks a lot,
mat

请先登录，再回答此问题。

回答（1 个）

Samayochita
Samayochita 2025-2-14
编辑：Samayochita 2025-2-14
Hi mat,
To make the scatter points appear to zoom proportionally with the figure, you can use ‘SizeData’ property (https://in.mathworks.com/help/matlab/ref/scatter.html#:~:text=Change%20the%20marker,SizeData%20%3D%20100%3B%0Acolorbar) along with ActionPostCallback.
Below is a code section of how you could achieve this:
s = 100; % A random marker size
figure;
hScatter = scatter(x, y, s, 'filled');
% Adjust marker size when zooming
zoomObj = zoom;
set(zoomObj, 'ActionPostCallback', @(src, evnt) adjustMarkerSize(hScatter));
% zoomObj.ActionPostCallback triggers adjustMarkerSize after zooming.
The “adjustMarkerSize” function has been defined to fetch the axes limits (XLim, YLim) to determine the zoom level and adjust the “SizeData” property as you zoom into the plot.
function adjustMarkerSize(hScatter)
ax = ancestor(hScatter, 'axes');
xLim = ax.XLim;
yLim = ax.YLim;
% Compute new marker size based on zoom level
scaleFactor = mean([diff(xLim), diff(yLim)]);
hScatter.SizeData = 1000 / scaleFactor; % Adjust size inversely to zoom level
end
Hope this helps!

类别

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

标签

Community Treasure Hunt

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

Start Hunting!

Translated by