A Neural Network question
Hi Phil, I don't think this is the correct list for this. You question has nothing to do with R specifically which is the purpose here. I suggest you pursue other help lists related to neural networks to try and find someone to assist you. Regards, Charles
On Sat, Apr 16, 2016 at 2:08 AM, Philip Rhoades <phil at pricom.com.au> wrote:
People, I thought I needed to have some familiarity with NNs for some of my current (non-profit, brain-related) projects so I started looking at various programming environments including R and I got this working: http://gekkoquant.com/2012/05/26/neural-networks-with-r-simple-example however I needed pictures to help understand what was going on and then I found this: https://jamesmccaffrey.files.wordpress.com/2012/11/backpropagationcalculations.jpg which I thought was almost intelligible so I had an idea which I thought would help the learning process: - Create a very simple NN implemented as a spreadsheet where each sheet would correspond to an iteration I started doing this on LibreOffice: - I think am already starting to get a better idea of how NNs work just from the stuff I have done on the spreadsheet already - I have now transferred my LibreOffice SpreadSheet (SS) to a shared Google Docs Calc file and can share it for editing with others https://docs.google.com/spreadsheets/d/1eSCgGU5qeI3_PmQhwZn4RH0NznUekVP5BP7w4MpKSUc/pub?output=pdf - I think I have the SS calculations correct so far except for the stuff in the dashed purple box in the diagram - I am not sure how to implement the purple box . . so I thought I would ask for help on this mailing list If someone can help me with the last bit of the SS, from there I think I can then repeat the FR and BP sheets and see how the Diffs evolve . . Is anyone interested in helping to get this last bit of the spreadsheet working so I can move on to doing actual work with the R packages with better understanding? Thanks, Phil. -- Philip Rhoades PO Box 896 Cowra NSW 2794 Australia E-mail: phil at pricom.com.au
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