Need Dynamic y-axis, Else outliers take over

[davodogster]

Hi again @Dubrzr

Some of my signals have outliers which means that zooming into other parts of the series doesn't actually help because the y axis is based on the max and min value of the whole series. It would be super helpful if users could zoom into any part of the signal and have some of the values go outside the visible range of the y axis so that correct annotation can be performed.

Cheers

[Dubrzr]

Hi Sam,

This is something I also thought about, and something that I think I already tested here:

SignalAnnotation/annotator.js

Line 255 in f598033

//const vals = this._normalize(this.sig_vals.slice(offsetPts, end), 0, this.h);

Try to uncomment this line in your annotator.js file, it should be doing what you want.

The only thing that might me a problem is performance because for each move on the signal, more computations are made:

• compute the local min and max
• multiply each value by a new ratio

Which mean 3 more passes on all values that are displayed, lots of optimizations are possible, for example, replace Math.min.apply and Math.max.apply by custom function that only make a single pass and is faster (https://stackoverflow.com/a/13440842/3157230)

Might be cool if you can contact me Sam so that we can talk a little more about this. My mail = firstname + "." + lastname + "@aphp.fr".

[davodogster]

Thanks, uncommenting that line seems to do what I wanted! 👍
Sorry I keep mentioning it but.. the ability to be able to upload annotations (preferably from a csv but Json will work) would be super helpful because I could generate some noisy labels in python and then refine them in your app.

Thanks for the contact, will try to keep things on Github for now.