How to speed up manipulations of plot with a lot of data

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K E 2016-10-18

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https://ww2.mathworks.cn/matlabcentral/answers/307879-how-to-speed-up-manipulations-of-plot-with-a-lot-of-data

编辑： K E 2016-10-18

I have time series with 20000000 samples that I am plotting in R2016b for data exploration. I would prefer not to downsample or subset the data because I have to look at closeups scattered through the whole time series, and I need to be able to zoom in/out, select lines to extract values, etc. Possibly due to the data volume, the Figure Interactive tools (selection arrow, pan icon, data brush ) are periodically grayed out on the figure toolbar. Sometimes the cursor disappears inside the figure window if I want to zoom in. These down times can be several minutes.

Are there any tricks for manual manipulation of high-volume plots, such as avoiding use of markers?

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dpb 2016-10-18

" I can't downsample or subset the data, ..."

Of course you can; at most there are a few thousand pixels on the screen so more than that isn't seen, anyway. Decimate (including bounding if desired to keep min/max in range) to show initial plot, then pull in more data as needed in ranges or as zoom.

K E 2016-10-18