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Jack Latham


Last seen: 3 years ago |  Active since 2016

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Can you train a classification model to prioritise precision?
I'm working on a binary classification problem where the precision of classifying a particular class is far more valuable than o...

3 years ago | 1 answer | 0

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Methods to filter a feature matrix to change balance of labels (binary classification)?
I am working on a binary classification problem that is very unbalanced, e.g., 90% class 0, and 10% class 1. I am experimenting ...

3 years ago | 0 answers | 0

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Could someone give an example of how to calculate ARMA PSD values?
I'd like to estimate psd values for an audio sample using an ARMA approach, but can't seem to quite work out how to do it! If so...

5 years ago | 0 answers | 0

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How to record audio continuously, and have access to last x seconds of data??
I would like to be able to record audio continuosly, and be able to process the last say 10 seconds of data. The recording may ...

5 years ago | 2 answers | 0

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Make UIAxes invisible/visible when stacked in App desginer..
I'm using App designer to desing an app.. I have a couple of UIAxes stacked above each other, and am trying to set ones I want t...

5 years ago | 1 answer | 0

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How to compile gtcc.m?!
I have code that extracts a number of features, including gammatone cepstral coefficients using the matlab function gtcc. This ...

5 years ago | 1 answer | 0

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A clever way to have dynamic output variables from a function??
I have a function which creates a feature matrix with ~1500 different features, I'd like to pass an index of selected features t...

5 years ago | 1 answer | 0

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"Undefined function or variable" when the directory is correct, and function is there!?
I'm having a frustrating issue with MATLAB, I'm very often getting an error - "Undefined function or variable" when calling a fu...

5 years ago | 0 answers | 0

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TCP/IP data collection from instrument w/o any information
I'm trying to stream data from an ultrasound device, and am not getting very far. Any help/suggestions would be FABULOUS. So I...

5 years ago | 0 answers | 0

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How to get label order w.r.t. scores from classification?
I've got a number of different neural network models, which I can classify images by using, [Labels, scores] = classify(net,...

6 years ago | 1 answer | 0

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Real-time audio classification -> how to get latest X seconds of audio input
I'm putting together a program to classify audio signals (input via mic) in real time. The classification portion of the code ca...

6 years ago | 0 answers | 0

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How to identify when an Image classifier is passed an image which fits poorly with all classification labels
I've retrained AlexNet to identify images corresponding to 3 different classes. I'd like to obtain a confidence measure for the ...

6 years ago | 0 answers | 0

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Outputs of classifiers and how to measure confidence?
Hi, so I'm using the classification learner to train various models. I've found that the trained models can output (as well the ...

7 years ago | 1 answer | 0

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Recording audio reduces speaker level!?
When I record audio (using record(recObj, time)) the level of audio being played is reduced. This doesn't effect the running of ...

7 years ago | 0 answers | 0

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Question


Disadvantages of using large NFFT value in pwelch/spectrogram
I'm using the pwelch function to analyse power spectrums of an audio signal: w = 512; nfft = 4096; ...

8 years ago | 1 answer | 1

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Question


Why can't I plot a spectrogram in my GUI?!?
So I have a gui that allows me to record audio, and then either plot a time history or a spectrogram of the data depending on a ...

8 years ago | 1 answer | 1

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