plot large dataset with sample points

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Sam Alex
Sam Alex 2012-12-22
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

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Image Analyst
Image Analyst 2012-12-22
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);
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Sam Alex
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
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.

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