# InteractiveViz - an interactive visualization toolkit for large datasets

**URL:** https://discourse.julialang.org/t/interactiveviz-an-interactive-visualization-toolkit-for-large-datasets/40878
**Category:** Package Announcements
**Tags:** plotting
**Created:** [June 6, 2020, 2:33pm UTC](https://discourse.julialang.org/t/interactiveviz-an-interactive-visualization-toolkit-for-large-datasets/40878 "2020-06-06T14:33:24Z")
**Posts on this page:** 1
**Page:** 3

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### Author: ![marianoarnaiz](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/marianoarnaiz/32/19377_2.png) [@marianoarnaiz](https://discourse.julialang.org/u/marianoarnaiz)
#### Post date: [May 30, 2024, 8:37pm UTC](https://discourse.julialang.org/t/interactiveviz-an-interactive-visualization-toolkit-for-large-datasets/40878/41 "2024-05-30T20:37:54Z")

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I have a 2D data to plot in iheatmap. The data has positive and negative values. I try to plot:

> cm=:RdBu\_11  
> fig=Figure(;size = (800, 600))  
> ihm = iheatmap(fig[1,1], DAS.time, DAS.offset ,DAS.data, colormap=cm, colorrange=(-10000,10000))  
> Colorbar(fig[1,2], ihm.plot)

And get this figure

 ![Screenshot 2024-05-30 at 10.31.58 PM](https://global.discourse-cdn.com/julialang/original/3X/2/6/260a6bdae34f6db4c5b9ba83e8b371ec756fb3c7.jpeg)

Here all the bins in the heatmap are color to the max value of the pool, and the data is not represented very well. A lot of the bins should be red as the max amplitude (that is abs of the value) in the bin is actually negative.

A nice option would be to have something saying: if the sum/average of all the values to be pooled is negative use the minimum value, and if the sum/average of all the values to be pooled is positive use the maximum. Or something like that hehehe.

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