Data reduction or resize function for imagesc plot

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Andreas Westlund
Andreas Westlund on 30 Mar 2022
Answered: yanqi liu on 31 Mar 2022
Hi,
I have data on a 2-dimensional grid where the number of points in the x-direction is much larger than what can be displayed. 10k data points and the plot window is at best around 1000 pixels wide.
I would like to change how matlab presents the data. Specifically I would like matlab to use the maximum z-value for all the data points represented by each pixel. So in the example above, i would like the first pixel to use the maximum Z-value of the first 10 data points.
I could do this in an ugly ad-hoc way, but I would like this to work also when I zoom or resize the plot. Is that possible somehow?
(I have found that I can use a custom method with imresize. If there is a way to change how a certain figure is resized when zoomed, that could be an option. I am not sure that is the right path though.)

Answers (1)

yanqi liu
yanqi liu on 31 Mar 2022
yes,sir,may be use pca to get data dimension reduce,and plot in two or three space

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