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Greg Heath


3,047 total contributions since 2011

Backgound in Electromagnetic Theory, Plasma Physics and Radar Target Identification using Neural Networks.
PhD Student, Research Assistant and Lecturer at Stanford;
AB, ScB, ScM Student; Research Assistant, Fellow and Professor at Brown;
27 yrs researching Ballistic and Theatre Missile Defense using Neural Networks at MIT Lincoln Laboratory. Retired 2003.

PLEASE DO NOT SEND QUESTIONS AND DATA TO MY EMAIL. HOWEVER, CAN SEND LINKS TO POSTS.
Professional Interests: Neural Netwoks, Spectral Analysis

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Answered
Difference between 2D input and multiple input with recurrent neural networks for time series
Written MATLAB should treat the cases the same. Unfortunately I don't have time to prove it Greg

약 3시간 ago | 0

Answered
how can i train my network for test and validation data?
The MATLAB default AUTOMATICALLY splits the data into TRAINING + VALIDATION+TEST SUBSETS in the ratios 0.7/0.15/0.15. For r...

7일 ago | 0

Answered
Best Neural Network for Multivariate Regression
Use FITNET. Accept all parameter settings. Train 10 models with different random initial weights If unsuccessful. Repeat wi...

7일 ago | 0

| accepted

Answered
how can i train my network for test and validation data?
Where is your training data? The MATLAB default is a random choice of trn/val/tst = 0.7/0.15/0.15 I choose candidate values ...

7일 ago | 0

Answered
Early Stopping for Deep Networks
It is not clear to me that, based on a random 15% of the data, this is a better choice. It would be interesting to make a formal...

7일 ago | 0

Answered
How to compute gradients using the Neural Network Toolbox software through a backpropagation process?
You are confused The target function is constant and independent of the weights. Hope this helps. *Thank you for formal...

7일 ago | 0

Answered
Setting the best training / validation ratio in a Neural Network
1. ALWAYS START WITH 10 DESIGNS USING THE MATLAB DEFAULT! 2. Then evaluate the results to determine what to modify. ...

7일 ago | 1

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MATLAB Dropout layer during prediciton
help dropout ... It is important to note that when creating a network, dropout will only be used during training. Hope this he...

12일 ago | 0

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How to use predict(net,X) with Sequence data or data which have single dimensional input?
How do you expect us to help when you do not show us your code ??? Just the fact that the error involves "predict" and you show...

12일 ago | 1

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I am unable to understand the code
See help dlmread doc dlmread Thank you for formally accepting my answer Greg

12일 ago | 0

Answered
Problem with Fitnet function
Delete the outer parentheses >> ( net = fitnet(10) ) % ERROR >> net = fitnet(10) % OK !!! Tha...

12일 ago | 0

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How do I improve my neural network performance?
The mse for the trial answer output = mean(target')' is MSE00 = var(target',1) Therefore , I uase the following as a gen...

18일 ago | 0

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MLP Pattern discrimination task
Probaby as well as any other technique. *Thank you for formally accepting my answer* Greg

18일 ago | 1

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Radial Basis Function Networks
Replace x with t Thank you for formally accepting my answer Greg

18일 ago | 0

| accepted

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How I can implement a custom hidden and a regression output layer with 2 inputs?
Is that one input a scalar or a vector? Hope this helps **Thank you for formally accepting my answer** Greg

21일 ago | 0

Question


HOW DO I CUT, COPY AND PASTE ???
I must be missing something textfile ==> MATLAB & MATLAB ==> MATLAB Greg

28일 ago | 1 answer | 0

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Answered
I have xy coordinates as input. My question is: How do I give these xy coordinates as inputs to the neural network?
Order them in the way that is best for YOUR understanding. Given that, multiple rounds of training should yield a good approxim...

28일 ago | 0

Answered
neural network for quadratic programming
NNs are designed given target/input pairs. You have no targets. Or am I missing something??? Hope this helps. Greg

약 1달 ago | 0

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Regarding Multi-label transfer learning with googlenet
Decades old solution: Divide each output by the sum to obtain the relative probability ...

약 1달 ago | 0

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Matlab Shallow Network Mini Batch Training
If you have a huge dataset, it is often rewarding to just randomly divide it into m subsets. Then design with 1 and test on m-...

약 1달 ago | 0

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Why is there a error message that says the numbers of input signals and networks inputs do not match?
See my attachment Note that typically, all you have to define is the input and target. Use of CONFIGURE is UNNECESSARY It ca...

약 1달 ago | 0

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How can I modify objective function in "trainingOptions" to suit a particular unusual problem
I think you are confused. 1. Your input and target define your function 2. In general, the standard net with tansig hidde...

약 1달 ago | 0

Question


UNABLE TO PASTE INTO COMMENT AND ANSWERS BOXES
Had troubles with the computer. Was able to get it running again. However, now I cannot paste into MATLAB. Any suggestions? ...

약 1달 ago | 0 answers | 0

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Answered
Do a leave one out cross-validation in patternnet
Over the past decades I have tried every cute data division technique known to man and beast. BOTTOM LINE: The easiest suffi...

약 1달 ago | 0

| accepted

Answered
Why does this produce an error?
Remove the square brackets in the first line Thank you for formally accepting my answer Greg

약 2달 ago | 0

Answered
How to use multiple labels as targets in Neural Net Pattern Recognition Toolbox?
The following is standard for classification and pattern recognition: 1. Label the classes from 1 to 14 2. ...

약 2달 ago | 1

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What the function "preparets" does in NARX neural network toolbox
The data in 2 rows are taken to provide the initial delay conditions, Hope this helps. Thank you for formally accepting my a...

약 2달 ago | 0

| accepted

Answered
what is the difference between trainlm and trainbr?
One minimizes mean square error The other minimizes a weighted sum of squared errors and squared weights The latter is typ...

약 2달 ago | 0

Answered
Cross Validation in Neural Network ?
You may be confused. The MATLAB DEFAULT is RANDOM DATA DIVISION with 80% training 10% validation (tends to prevent o...

약 2달 ago | 0

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