Set x-axis limits using xlim AND autoscale y-axis

183 次查看（过去 30 天）
Paddy
Paddy 2011-6-10
评论： chlor thanks 2016-7-11
I would like to do something incredibly simple. On a plot I would like to be able to zoom in to a certain portion by setting the x-axis using xlim, and have the y-axis autoscale to the min/max values in the NEW AXES rather than the whole dataseries. This is currently what happens if I use xlim([x1 x2]) then e.g. axis 'auto y'. Using axis tight resets both x and y-limits to show the entire dataseries.
I should point out I am plotting a waveform object (structure), not just two vectors, so can't just plot the relevant part of the data by doing something like plot(x(index1:index2),y(index1:index2))
I feel like this should be pretty simple, but I can't work it out, other than manually setting the y-axis limits. Any suggestions?
Thanks for your help!
  1 个评论
Jan
Jan 2011-6-10
I do not understand the question. What do you want to achieve for the y-limits?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

John
John 2014-8-17
编辑：John 2014-8-17
I understand the problem. After calling:
axis tight
both axis are reset. If you wanted to set your xlim and then rescale your y-axis automatically, the previous command will not work. Also, if you try to set the ylim parameters to inf and -inf, which normally autoscales, you get the same result
ylim([-inf, inf])
The limits are set based on the entirety of the data set, not just what's viewable in your new xlim window.
THE SOLUTION : After setting xlim([xmin,xmax]), you can autoscale the y-axis by:
axis 'auto y'
Finally, if you simply limit the range of data in your original plot command, you will not have this problem.
Matt Fig
Matt Fig 2011-6-10
Calling:
axis tight
Does reset the axes limits to the range of the data, as documented. So why is it that you are calling this after you set the axes limits to the disired range? I.e., what are you trying to accomplish by calling the AXIS function, if you already have the desired range?

类别

在 Help Center 和 File Exchange 中查找有关 Graphics Object Properties 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