# Plotting image data in Julia is much slower than MATLAB

**URL:** <https://discourse.julialang.org/t/plotting-image-data-in-julia-is-much-slower-than-matlab/79660>\
**Category:** General Usage\
**Tags:** images, matlab\
**Created:** [April 18, 2022, 9:36pm UTC](https://discourse.julialang.org/t/plotting-image-data-in-julia-is-much-slower-than-matlab/79660 "2022-04-18T21:36:58Z")\
**Posts on this page:** 1\
**Showing post:** 18

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**Author:** ![jmert](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jmert/32/3161_2.png) [@jmert](https://discourse.julialang.org/u/jmert)\
**Post date:** [April 20, 2022, 3:22am UTC](https://discourse.julialang.org/t/plotting-image-data-in-julia-is-much-slower-than-matlab/79660/18 "2022-04-20T03:22:55Z")

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> [@stevengj](#):
>
> …this [thesis on downsampling huge timeseries](https://skemman.is/bitstream/1946/15343/3/SS_MSthesis.pdf)…

In case anyone is interested — after I came across that paper a few months ago, I wrote [this implementation](https://gist.github.com/jmert/4e1061bb42be80a4e517fc815b83f1bc) to play with it a bit. Bottom panel shows what the reference paper can do to a noisy timestream like the top panel (versus simple binned averaging in the middle panel).

 ![timestream_downsampled](https://global.discourse-cdn.com/julialang/original/3X/5/d/5d59f1f13f2ffa34029c91bfcb4688d12afaa58e.png)

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