# Grafica Library, changing colour of specific points

**URL:** <https://discourse.processing.org/t/grafica-library-changing-colour-of-specific-points/7151>\
**Category:** Libraries\
**Created:** [January 4, 2019, 9:32am UTC](https://discourse.processing.org/t/grafica-library-changing-colour-of-specific-points/7151 "2019-01-04T09:32:30Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![kll](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/kll/32/964_2.png) [@kll](https://discourse.processing.org/u/kll)\
**Post date:** [January 24, 2019, 4:03am UTC](https://discourse.processing.org/t/grafica-library-changing-colour-of-specific-points/7151/2 "2019-01-24T04:03:04Z")

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> [@simmi](#):
>
> But it changes the color of complete graph.

yes, i think that lib not has that multi color feature???

> can you show a picture how it looks now

> and a description on the criteria of color change

to give a idea if a other way would be more easy

see here i make my own graph,  
with a few code lines, possibly less i would need using any lib.

> [@Library to apply BandPass filter for EEG signals in Processing](https://discourse.processing.org/t/library-to-apply-bandpass-filter-for-eeg-signals-in-processing/4972/8):
>
> actually a low pass filter might do it, but filter 50 but get 30 [Hz] is not so easy ( you have to live with loss in amplitude and phase shift ( late ) ) but you not answer much questions, so still not know if you have batch data to analyze, or stream? you also possibly can not afford to use cpu demanding calculations. so why not just try the most easy filter ever! fil = inval \* A + fil \* B; ok, there are some small things about that: -a- tuning: A + B = 1; -b- init: a startup is dif…

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