plot large dataset with sample points

6 次查看（过去 30 天）

Sam Alex 2012-12-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/57241-plot-large-dataset-with-sample-points

Hello,

I would like to plot 2 large datasets (for comparison) using only sample points from each set so that markers can be clear (say 50 points). How will I do this and how do I choose these points from each dataset?

Thanks

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Image Analyst 2012-12-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/57241-plot-large-dataset-with-sample-points#answer_69235

在 MATLAB Online 中打开

If a subset of the points would illustrate the situation just as well as the complete set, why not just select some of them at random?

indexesToUse = randperm(totalNumberOfPoints, numberToUse);

4 个评论
显示 2更早的评论隐藏 2更早的评论

Sam Alex 2012-12-22

True, but these indices always taken at random or is there a way better to represent the data from your experience?

Image Analyst 2012-12-22

They're not always taken at random, that's just one way. You could take just the first N of the points, though if there's a trend in the data you might want to take every 1000th point or so, like this dataSubSet = data(1:1000:end). Basically use whatever method that works for you.

请先登录，再进行评论。

请先登录，再回答此问题。