Awesome! I also saw the same scrolling glitches in Firefox on Linux.
On Sun, Jun 5, 2022 at 6:42 AM Jan-Pieter Jacobs <janpieter.jac...@gmail.com> wrote: > > I had some fun putting J Playground through its paces and wrote the > following neural network demo: > > https://jsoftware.github.io/j-playground/bin/html2#url=https://gist.githubusercontent.com/jpjacobs/6ff68c07bf764ad886e097ffbd19f5f0/raw/52b0563a7daa76df7fa57a3743da45ca0755f1a7/nn.ijs > > It dowloads the CSV and DSV packages and the Spirals dataset, normalises > the data and applies some random jitter. > The neural network can be given any number of layers of any size (of > course, respecting the input layer to be of size 2 and the output layer of > size 3,as there are 2 input dimensions and 3 labels, one-hot encoded), e.g. > net=: nn 2 15 8 3 > It is trained with stochastic gradient descent and backpropagation with > quadratic loss, using e.g. 5000 100 0.1 sgd__net spl =: splitdata data ,. > labels > When finished, it outputs some stats and some nice pictures of the data and > classification borders, using report__net spl. > > I was **very** impressed to see it run (entire script with 5000 training > epochs, and visualisation) without going out of memory in under 35 secs on > my mid-range phone… just wow. > > Some things I noted with respect to the playground: > - I had to patch the enclength_jzlib_ verb to allow bigger viewmat pictures > (see at the bottom of the script). > - It's a pity the text output is blocked until all calculations are done, > as this renders it impossible to give status updates. Is there a trick like > in JQt (wd 'msgs') to overcome this? > - Maybe related: plots and text output do not keep their relative output > positions, which I think would be desirable when trying to make a coherent > example. > - The plot quality is not great yet, while I saw j901 on iPadOS seems to > get vector graphics from plot. As the Playground would be the showcase of > J, it would be great if it could also include crisp graphics. > - Lastly, I noted some strange scrolling glitches after running the script > in chrome on Windows (didn't try elsewhere): when scrolling up the terminal > output would jump back down from time to time. > > Any suggestions for improvement are of course welcome, though I kept the > features minimal to avoid making it too lengthy. To my taste, the report > function is for instance a bit too wordy, but necessary to show some > interesting graphs. If one were really ambitious, it could be turned into > something like: http://playground.tensorflow.org/ ( open source, by the > way). > > I hope you have fun tinkering with the neural network! > Best regards > Jan-Pieter > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
