What is crystal ball?

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madhan ravi
madhan ravi am 10 Jul. 2019
Kommentiert: Tim Fulcher am 18 Sep. 2020
I have seen some comments by some of the answered referring to crystal ball, been bugging for days. Does it actually suggest you a solution? Or is it just my hallucination? Can it be only obtained by certain people? I feel it as some kind of superpower ?♂
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Tim Fulcher
Tim Fulcher am 18 Sep. 2020
Hi Madhan,
My reply is a bit late and I hope you've sorted your problem. But if you haven't the crystal ball function is a probability distribution function used in high energy physics. It's a combination of a power law function and a Gaussian. Wiki has a decent description. It looks, typically, like this::
Tim Fulcher
Tim Fulcher am 18 Sep. 2020
I have synthesised a C-B function but not yet fitted:

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Image Analyst
Image Analyst am 11 Jul. 2019
It's a Toolbox, but as of the moment, the only person outside the Mathworks staff who has it is Walter Roberson. He seems to be the only beta tester in the general public that the Mathworks trusts to evaluate it.
The times it will be evident that he has it, and has used it, is when a poster posts a question that is horribly missing of information required to give a meaningful answer (or gibberish), yet Walter posts a brilliant answer and the poster replies "Yes, that's it!!!" The rest of us are left scratching our heads thinking "How could he possibly know all that? Those requirements were never stated." The Answer is : the Crystal Ball Toolbox. It allows the user to see the poster's screen so that they don't even need to pose a complete answer or post any script or data.
A related toolbox, still in alpha, is the Mind Reading Toolbox. I suspect this is even more powerful as it lets you get into the mind of the poster even before the poster has written any code or even formulated a comprehensible question. I again suspect that Walter is the only one allowed to test this one.
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Rik
Rik am 13 Jul. 2019
That sounds really cool. I've heard of some study with MRI where they showed participants images and recorded the response of the visual cortex. Then they asked the participants to imagine a scene and recorded the response again. The images were very fuzzy and you need an MRI (or more likely an fMRI), but they got really nice results.
Image Analyst
Image Analyst am 13 Jul. 2019
Rik, yes that was presented around 5 years ago by a neuroscientist at Univ. California, Berkeley. I saw his keynote talk at Electronic Imaging (Jan. 2014 I believe). They basically collected a bunch of brain patterns of subjects who were shown images while in an fMRI. Scenes of beaches, babies, cars, of whatever. Then they trained a deep learning network with those brain patterns, and when they showed subjects random/unknown (to the researchers) images, the trained network was able to predict what the subjects were viewing with an impressive accuracy.
If they can do this level of mind reading today, imagine what they'll be able to do in 100 or 500 years. Kind of fascinating yet scary at the same time.

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