Pre-determine plot ranges?

2 次查看（过去 30 天）
Chris
Chris 2019-8-21
评论： Chris 2019-8-23
Given two vectors of the same length is there a way to determine the axes ranges that would result if the data were plotted without plotting the data?
I am looking to update xlim and ylim manually after the plotted data is changed* but with out relying on the automatic resizing as there are other things plotted that I dont want to be used in determining the plot ranges. Also I would rather not redraw the entire figure with just the modified data then redraw the larger thing.
(plotted data is changed*: I am manipulating the XData and YData parameter of plotted data directly with a handle.)

请先登录，再回答此问题。

采纳的回答

Adam Danz
Adam Danz 2019-8-21
编辑：Adam Danz 2019-8-21
If vector1 and vector1 are the x and y values to be plotted, the xlim and ylim for a tight axis would be,
xlim([min(vector1), max(vector1)]);
ylim([min(vector2), max(vector2)]);
If you'd like to access those values from the line object handle 'h',
xlim([min(h.XData), max(h.XData)]);
ylim([min(h.YData), max(h.YData)]);
If you'd like to add 5% of the data range on each side so your max and min data points are not on the axis edges,
xlim([min(x),max(x)] + [-1,1]*.05*range(x))
ylim([min(y),max(y)] + [-1,1]*.05*range(y))
  4 个评论
显示 2更早的评论
Adam Danz
Adam Danz 2019-8-21
编辑：Adam Danz 2019-8-22
Your proposal requires that an axis already exists. If you want to base "int" from my solution on the axis tick interval,
int = mean(diff(get(gca,'xtick')));
xl = [floor(min(x)/int)*int,ceil(max(x)/int)*int];
Chris
Chris 2019-8-23
yep good edit. initilization wont be a problem and the changed data points will be of the same magnitude so reusing tick should work.

请先登录，再进行评论。

更多回答（0 个）

类别

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

标签

产品


版本

R2019a

Community Treasure Hunt

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

Start Hunting!

Translated by