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The latest version of the book is B13.0, released 25 days ago. If you've bought a PDF of the book and would like to update it to this version (for free), visit your home page.

By default this page displays the errata for the latest version of the book. If you have a previous version, select it here:

If you've found a new error, please submit it.

  • Typo
  • Tech. error
  • Suggestion
  • Maybe next edition
  • Not a problem
  • Reported in: B13.0 (03-Feb-20)
  • Fixed: 07-Feb-20, awaiting book release
PDF page: code
The code plot_linearly_separable inside 08_perceptron file should be completed with plt.pause(1) inside def plot after instruction . Becaus...more...
Paolo Perrotta says: I added pauses outside that function call, but you're right that this doesn't work if you call the function from your own code. I moved the pauses inside the function instead. Thanks. By the way, feel free to open another erratum and use it to give me your name if you want to get included in the Acknowledgements page (unless you already opened other errata in the past with your name, in which case I already should have it).
  • Reported in: B13.0 (09-Feb-20)
  • Fixed: 23-Feb-20, awaiting book release
PDF page: 0000
Running this code ……...code/13_batching/solution/ ...…...give this error ...….. code\13_batching\solution\neural...more...
Paolo Perrotta says: That's expected. ;) This case is covered by the "Numerical Stability" box, in chapter "Building the Network".
  • Reported in: B13.0 (01-Feb-20)
  • Fixed: 02-Feb-20, awaiting book release
PDF page: 70
At page 58 in pdf the sentence... meaning that they have one row for examples, and one column.. is correct, but at page 70 in pdf, the sentence.... on...more...
Paolo Perrotta says: Correct! For some reason, nobody had noticed this one. If this is your first erratum, could you please send me your name at paolo.perrotta at Gmail? I'd like to add you to the acknowledgments page.
  • Reported in: B13.0 (30-Jan-20)
  • Fixed: 31-Jan-20, awaiting book release
PDF page: 141
In Chapter 11, at page 141 in pdf version, the sentence .....The next-to-last line calculates (y^- y)*W2*σ ..... have a typography error because th...more...
Paolo Perrotta says: Eagle-eyed. Thank you! Fixed.