Sepp

Aktiv seit 2014

Followers: 0 Following: 0

Nachricht

Statistik

Feeds

Frage

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...

fast 7 Jahre vor | 0 Antworten | 0

0

Antworten

Frage

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...

fast 7 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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...

mehr als 7 Jahre vor | 0 Antworten | 0

0

Antworten

Frage

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...

mehr als 7 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

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...

mehr als 7 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

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...

fast 8 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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...

fast 8 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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...

etwa 8 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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 ...

etwa 8 Jahre vor | 0 Antworten | 0

0

Antworten

Frage

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 ...

mehr als 8 Jahre vor | 0 Antworten | 0

0

Antworten

Frage

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...

mehr als 8 Jahre vor | 0 Antworten | 0

0

Antworten

Frage

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...

mehr als 8 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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...

mehr als 8 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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 =...

mehr als 8 Jahre vor | 0 Antworten | 0

0

Antworten

Frage

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...

mehr als 8 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

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...

mehr als 8 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

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...

mehr als 8 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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...

mehr als 8 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

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...

mehr als 9 Jahre vor | 0 Antworten | 0

0

Antworten

Frage

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...

mehr als 9 Jahre vor | 1 Antwort | 1

1

Antwort

Frage

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

mehr als 9 Jahre vor | 0 Antworten | 0

0

Antworten

Frage

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;...

mehr als 9 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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...

fast 10 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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...

fast 10 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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...

fast 10 Jahre vor | 0 Antworten | 0

0

Antworten

Frage

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...

fast 10 Jahre vor | 2 Antworten | 0

2

Antworten

Frage

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 ...

fast 10 Jahre vor | 0 Antworten | 1

0

Antworten

Frage

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 ...

fast 10 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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...

fast 10 Jahre vor | 0 Antworten | 1

0

Antworten

Frage

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...

fast 10 Jahre vor | 2 Antworten | 0

2

Antworten

Mehr laden