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# Jon Cherrie

### MathWorks

24 total contributions since 2011

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Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

2 months ago

Answered
How do I get the confusion matrix for all trained data
You can use the confusionmat command https://au.mathworks.com/help/stats/confusionmat.html When you call it, make sure that yo...

2 months ago | 1

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Add two numbers
Given a and b, return the sum a+b in c.

2 months ago

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Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

2 months ago

Solved

Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

2 months ago

Solved

Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

2 months ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

2 months ago

Answered
LSTM time series forecasting with 3 inputs using chickenpox example
Rather than starting from the chickenpox example, you might be better off starting from the "Sequence-to-Sequence Regression Usi...

2 months ago | 0

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multivariate time series forecasting using lstm
Rather than starting from the chickenpox example, you might be better off starting from the "Sequence-to-Sequence Regression Usi...

2 months ago | 0

Answered
How can I call network
You can use the sim function: https://au.mathworks.com/help/deeplearning/ref/sim.html The sim function is usually called im...

2 months ago | 0

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Answered
How to calculate gradient of output of a neural network with respect to its parameters?
You can use dlgradient and dlfeval to take derivatives with respect to the input or to the parameters Here's an example: I'm...

2 months ago | 1

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Answered
How to re-load MatLab's feedforwardnet to Workspace?
I recommend using a cell array rather than a regular array for this case, e.g., FFNN_trained_sum = {}; % Use {} here, not [] f...

2 months ago | 0

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Flatten layer in MATLAB
In MATLAB, in many cases, you don't need a flattern layer. Flattern layers are often used before a fully connected layer. The fu...

2 months ago | 1

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What does Predict for neural network give back?
I think that Ypred(i,j,k,n) is the score for class k for pixel i,j of the n-th image. Often the score is the probability or si...

2 months ago | 0

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How to understand Softmax layer activations for pretrained CNN?
How to identify what class they correspond with? We can get this from the class names property of the output layer. What these...

2 months ago | 0

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Recommendation for neural network implementation
It might be that you can solve this as sequence classification problem, e.g., https://www.mathworks.com/help/deeplearning/ug/c...

2 months ago | 1

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Speed up 'dlgradient' with parallelism?
You can use a GPU for the dlgradient computation by using a gpuArray with dlarray. In this example, the minibtachqueue, puts da...

2 months ago | 1

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ONNX export yields Error !
It looks like you are hitting this bug: Error when using functions for importing or converting ONNX or Caffe models on Windows ...

3 months ago | 2

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extractFileText returns <missing>
The extractFileText function has been significantly rewritten for R2021a and may give different results for some PDF files. I re...

3 months ago | 1

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Will MATLAB provide Bert word embedding support?
BERT is available via this GitHub repository https://github.com/matlab-deep-learning/transformer-models

3 months ago | 3

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Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

5 years ago

Answered
cftool crashes Matlab
There are many potential sources of the problem here. Please contact MathWorks Technical Support so they can investigate the pro...

9 years ago | 1

Answered
Custom m-file function in fitting tool
Yes, it is possible to use a Custom Equation in CFTOOL defined from a MATLAB file. Here is an example. Start by creating a file ...

10 years ago | 0

Answered
The integral method used in postprocessing Analysis of Curve fitting tool
One of two techniques is used. # For many of the <http://www.mathworks.com/help/toolbox/curvefit/f1-76041.html#f1-63727 para...

10 years ago | 0