David J. Mack
UniversityHospital Zurich
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10 of your answers have been accepted
Awarded to David J. Mack on 15 Feb 2022
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Contribute at least one answer each month for 3 consecutive months
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Accept 1 answer given by other contributors
Awarded to David J. Mack on 20 Jul 2017
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Awarded to David J. Mack on 31 Oct 2012
Feeds
how to compute running correlation coefficient
And again... Have a look at <https://ch.mathworks.com/matlabcentral/fileexchange/65342 MOVCORR> Greetings, David
nästan 7 år ago | 1
How to compute sliding or running window correlation coefficient?
If someone encounters this problem, I have written a function in analogy to the MOVSUM function, which compute the moving Pearso...
nästan 7 år ago | 0
Rolling correlation / moving correlation
Hey Mate, I have written a function in analogy to the MOVSUM function, which does exactly that: <https://ch.mathworks.com/...
nästan 7 år ago | 0
How to find next number divisible by n
How about b = n * ceil(a / n) Greetings, David
ungefär 7 år ago | 0
Find RR Interval in seconds
The obvious solution would be: rrInSec = rrInSamples / samplingRateInHz
ungefär 7 år ago | 1
| accepted
Change legend width after reisze of legend line length
Hey Simon, this is an issue which pops up regularly, since the customization options of legends are currentyl (when I last ch...
ungefär 7 år ago | 0
How to delete a plot in UIAxes?
You could store the handle to the fitted line in the UserData of the figure and then retrieve it every time the button is hit an...
ungefär 7 år ago | 1
| accepted
Grouping multivariant data for Andrewsplot
Hey! So |andrewsplot| states that "The rows of X correspond to observations, the columns to variables". It seems that you hav...
ungefär 7 år ago | 0
| accepted
How changing the loglog scale x and y axis?
Have you tried to use <https://ch.mathworks.com/help/matlab/ref/semilogy.html semilogy> instead of |loglog|, e.g.: semilogy...
ungefär 7 år ago | 1
Increase nonzero values without deleting zeros
Hey monmatlab, simply use logical indexing: Y = X; isNonzero = X~=0; Y(isNonzero) = 10*Y(isNonzero); or the more ...
mer än 7 år ago | 1
| accepted
A very quick question
Hey Radoslav, In general, to convert a logical array to ids use |<http://www.mathworks.com/help/matlab/ref/find.html find>|. ...
mer än 7 år ago | 0
How to create a new matrix adding vectors of different size based on time
Hey Robert! First, a conceptual question: Can you make sure you have the same sampling interval & phase across all your signa...
mer än 7 år ago | 1
| accepted
Plotting a lattice with color coded nodes
Hey Bill! % Generate the random values on the 50x50, 2-dimensional lattice directly % using X = randi(imax,sz1,...,szN)...
mer än 7 år ago | 0
| accepted
How can I adjust the labels on contour lines in a 'meshc' 3D-plot?
Hey Ibrahim, have a look at <https://ch.mathworks.com/help/matlab/ref/contour-properties.html |Contour Properties|> - the |La...
mer än 7 år ago | 0
| accepted
how to reduce dimensionality of features by usin pca?
To get a simply answer (whitout really adressing the problem), have a look as <https://ch.mathworks.com/help/stats/pcares.html |...
mer än 7 år ago | 0
Replication factors must be a row vector of integers or integer scalars.
nFilters/16 is probably not an integer. Depending on your needs, try round(nFilters/16) instead or use a number of filters which...
mer än 7 år ago | 1
TEXTSCAN is my personal nemesis: Quotes strings with commas
Thanks Stephen for staying with me (you where right in the first place; reading the doc carefully helps)! I finally found my ...
nästan 8 år ago | 0
Question
TEXTSCAN is my personal nemesis: Quotes strings with commas
Dear all, I thought I acquired some Matlab knowledge over the years. But |textscan| really makes me feel dumb. I can not fi...
nästan 8 år ago | 3 answers | 0
3
answersReplace elements in a SxS matrix with zero, in each column but in different rows
Hey Miroslav, have you looked at the |<http://www.mathworks.com/help/matlab/ref/sub2ind.html sub2ind>| function? Should be so...
nästan 8 år ago | 1
What does "something = cell (size(session,1),1" mean/look like?
Hey Marie, the above creates a column cell with n elements, where n are the number of rows of session. Cheers, David
nästan 8 år ago | 1
Import and find a specific number from a text file
Try use regexp: file='c:\Users\David J. Mack\Desktop\test.txt'; numFormat1 = {'[ ]{1,7}(\-?\d+\.\d{3})'}; %e.g. %12.3f ...
nästan 8 år ago | 0
how to plot auto correlation and cross correlation function in a single figure?
The negative autocorrelation is the same as the positive as you use the same signal for the correlation. So if you want to pret...
nästan 8 år ago | 0
3D plot of an equation with 3 variables
Hey Amruth, have a look at |<https://www.mathworks.com/help/matlab/ref/surf.html surf>|. Use the surf(x,y,z,c) syntax. Gre...
nästan 8 år ago | 0
Creating an arbitrary number of displaced Gaussian
Hey Jason, <https://www.mathworks.com/help/matlab/ref/bsxfun.html BSXFUN> is your friend (and your enemy w.r.t. readability): ...
nästan 8 år ago | 0
interp1 - rant
If its only about the 1x1xN array not working, simply use <https://www.mathworks.com/help/matlab/ref/squeeze.html squeeze>. E.g....
nästan 8 år ago | 1
How can I label my EEG-data plotting in gui?
Is your data all in the same |axes| or in separate |subplot| s? In the first case use the |text| function and set its |'Unit'| p...
nästan 8 år ago | 0
Counting Plotted Coordinates in image
If you have your 2xN dot matrix |dots| which presumably contain the x (row 1) and y (row 2) coordinates, then N is the number of...
nästan 8 år ago | 0
No dublicates in for loop.
Hey Kian, I am not sure if I really understood your problem, but maybe the following solution helps: %Assuming NumeriskD...
nästan 8 år ago | 0
| accepted
I have a datafile contains data sets (size 200* 15) .how can I apply on all the data a lowpass butterworth filter of 2-order with cutoff fre 10 HZ
Hey Rahul, use <http://www.mathworks.com/help/matlab/ref/filter.html FILTER> with the coefficients created with <http://www.m...
nästan 8 år ago | 0
| accepted
How to get Ones along the diagonal
The built-in function <http://www.mathworks.com/help/matlab/ref/diag.html DIAG> is your friend: X = diag(ones(5,1)) Gree...
nästan 8 år ago | 2
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