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Visualizing speed and acceleration of typing (smartphone keyboard)
Hello everybody I have a dataset of smartphone keyboard recordings. Each sample consists of the pressed key on the keyboard (e...

plus de 7 ans il y a | 1 réponse | 0

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Heat map visualizing touch pressure on smartphone in x-y space
Hello everybody I have a dataset where each sample consists of x- and y-position, timestamp and a pressure value of touch inpu...

plus de 7 ans il y a | 1 réponse | 0

1

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AUC for multiclass classification
Hello everybody Let's assume that we have a classification problem with 3 classes and that we have highly imbalanced data. Le...

environ 8 ans il y a | 1 réponse | 0

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Too high correlation value from xcorr and corrcoef for uncorelated sequences
Hello I have two time series both of length 5604. The data is in the attachment (data.csv). The first column is the first tim...

environ 8 ans il y a | 2 réponses | 0

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P-value of cross-correlation
Hello everybody I have two time series Xa and Ya from which I'm calculating the cross-correlation vm2 in Matlab in the follow...

environ 8 ans il y a | 2 réponses | 0

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Investigating correlation for unequal signal lengths
Hello everybody I have measurements from two tablet sensors. The first sensor measures the touch pressure applied to the tabl...

plus de 8 ans il y a | 1 réponse | 0

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Which stasticial test is best to use in my case?
Hello I've conducted an experiment with around 100 people. I have 48 male and 52 female. Now I would like to accept or reject...

plus de 8 ans il y a | 1 réponse | 0

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Question

Creating legend for scatter plot
Hello I have created a scatter plot in the following way: arousal = [1, 9, 2, 5, 6, 8, 3, 2]; correctness = [1, 0...

plus de 8 ans il y a | 1 réponse | 0

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Saving math task as image using LaTeX
Hello I would like to generate varying math tasks with Matlab and save them as a .png image using LaTeX. For eaxmple, a task ...

plus de 8 ans il y a | 1 réponse | 0

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Question

Normalizing cross-correlation to [-1,1] for different length signals
Hello I have the following piece of code for calculating the cross-correlation between to signals. Visually, the signals are ...

presque 9 ans il y a | 1 réponse | 0

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Question

Correlation of shifted time-series
Hello I have two time series with different sampling rates. I can apply interpolation to correct for the different sampling r...

presque 9 ans il y a | 1 réponse | 0

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Question

Dividing fourier transform by factor n
Hello everybody I have a problem with the fast fourier transform. I would like to extract the low and high frequency power of...

presque 9 ans il y a | 1 réponse | 0

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Passing variable sized arguments to a method
Hello I'm using the PrintTable method of the <https://ch.mathworks.com/matlabcentral/fileexchange/52299-kermor-matlabtools ma...

presque 9 ans il y a | 1 réponse | 0

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Question

Visualization of standard deviation in scatter plot
Hello I have a 2-d scatter plot in Matlab. Let's assume the following scatter plot: x = linspace(0,3*pi,200); y =...

presque 9 ans il y a | 1 réponse | 0

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Question

Vertical lines with text in plot
Hello everybody I have created a plot in Matlab. Let's assume for simplicity that I have the following plot: x = 0:pi/10...

presque 9 ans il y a | 2 réponses | 0

2

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Question

Low-pass filter in Matlab / Python for removing movement noise
Hello I'm recording a signal (skin conductance) over time, i.e. I have a time series. Unfortunately, the signal is affected b...

presque 9 ans il y a | 2 réponses | 0

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Question

Calculating correlation of different time series
Hello I have several time series, i.e. I have measured a couple of signals over 15min. Each signal is sampled several times e...

environ 9 ans il y a | 1 réponse | 0

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Question

Setting time ticks in plot
Hello I have made a Matlab plot based on a data vector. On the x-axis should be the time and on the y-axis the value. For eac...

environ 9 ans il y a | 2 réponses | 0

2

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Question

Analysis of ROC and Precision-Recall curve
Hello I have run some machine learning experiments and now I have created some ROC and Precision-Recall curves (with the help...

environ 10 ans il y a | 1 réponse | 0

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Matlab TreeBagger OOBPrediction flag not recognized
Hello I'm using the TreeBagger function of Matlab R2015a with the name-value pairs 'OOBPrediction', 'on' and 'OOBPredictorImp...

environ 10 ans il y a | 1 réponse | 1

1

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Question

Specificity for multiple-class classification
Hello have read the paper "A systematic analysis of performance measures for classification tasks" in which different statist...

environ 10 ans il y a | 1 réponse | 0

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Question

How to calculate normalized euclidean distance on two vectors?
Hello Let's say I have the following two vectors: x = [(10-1).*rand(7,1) + 1; randi(10,1,1)]; y = [(10-1).*rand(7,1) + 1;...

environ 10 ans il y a | 1 réponse | 0

1

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Question

Matlab: Error in copied and renamed function
Hello I'm using the ga() function of Matlab for parameter optimization in the following way: options = gaoptimset('Cross...

plus de 10 ans il y a | 1 réponse | 0

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Question

Sampling according to difference in function value
Hello I have 20 values x1,...x20. Each value is between 0 and 1, for example 0.22,0.23,0.25,... x = rand(20,1); x = s...

plus de 10 ans il y a | 1 réponse | 0

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Question

Deriving integer and continuous values from Temperature (Simulated Annealing)
Hello I would like to use the technique related to Simulated Annealing for my problem. Let's say I have an initial temperatur...

plus de 10 ans il y a | 1 réponse | 0

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Question

How can I cluster data points according to the local minima they belong to?
Hello I'm using the genetic algorithm for hyperparameter optimisation. My loss function is the cross-validated loss, that mea...

plus de 10 ans il y a | 2 réponses | 0

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Question

How can I compute statistical significance with cross-validation?
Hello I've done nested cross-validation with 10 outer runs and 10 inner runs to evaluate different classifiers. In the end I ...

plus de 10 ans il y a | 1 réponse | 1

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Question

Initial Temperature for Simulated Annealing
Hello I'm trying to use simulannealbnd for parameter optimization. My big problem is the initial temperature T0. The default ...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question

Prior probability for classifiers
Hello In the fitcsvm method for training a SVM classifier one can set the prior for each class with the 'prior' flag. For mos...

plus de 10 ans il y a | 1 réponse | 1

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Question

Improving Nelder-Mead Optimization by Genetic Algorithms and Simulated Annealing concepts
Hello I'm using the Nelder-Mead simplex algorithm for hyperparameter optimization. It works quiet well but now I would like t...

plus de 10 ans il y a | 2 réponses | 0

2

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