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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...

4 years ago | 0 answers | 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...

4 years ago | 1 answer | 0

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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...

5 years ago | 0 answers | 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...

5 years ago | 2 answers | 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...

5 years ago | 2 answers | 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...

5 years ago | 1 answer | 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...

5 years ago | 0 answers | 0

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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...

6 years ago | 1 answer | 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 ...

6 years ago | 0 answers | 0

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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 ...

6 years ago | 0 answers | 0

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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...

6 years ago | 0 answers | 0

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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...

6 years ago | 1 answer | 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...

6 years ago | 1 answer | 0

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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 =...

6 years ago | 0 answers | 0

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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...

6 years ago | 2 answers | 0

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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...

6 years ago | 2 answers | 0

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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...

6 years ago | 1 answer | 0

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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...

6 years ago | 2 answers | 0

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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...

7 years ago | 0 answers | 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...

7 years ago | 1 answer | 1

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Specificity for multiple-class classification

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

7 years ago | 0 answers | 0

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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;...

7 years ago | 1 answer | 0

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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...

7 years ago | 1 answer | 0

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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...

7 years ago | 1 answer | 0

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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...

7 years ago | 0 answers | 0

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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...

7 years ago | 2 answers | 0

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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 ...

7 years ago | 0 answers | 1

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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 ...

7 years ago | 0 answers | 0

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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...

7 years ago | 0 answers | 1

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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...

7 years ago | 2 answers | 0