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# David J. Mack

### UniversityHospital Zurich

Last seen: 8 maanden ago Active since 2012

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resizeLegend(varargin)
Shortens a legend

Submitted

detectEcgWithAngle(ecg, fSInHz, varargin): Heartbeat detection using sample-to-sample angle
Implementation of the R-peak detector using the angle between successive samples.

how to compute running correlation coefficient
And again... Have a look at <https://ch.mathworks.com/matlabcentral/fileexchange/65342 MOVCORR> Greetings, David

meer dan 5 jaar 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...

meer dan 5 jaar 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/...

meer dan 5 jaar ago | 0

Submitted

movcorr(x, y, k, varargin): Compute windowed correlation coefficient
Compute a moving correlation for two vectors x & y in analogy to the MOV* functions.

How to find next number divisible by n
How about b = n * ceil(a / n) Greetings, David

meer dan 5 jaar ago | 0

Find RR Interval in seconds
The obvious solution would be: rrInSec = rrInSamples / samplingRateInHz

meer dan 5 jaar ago | 1

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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...

meer dan 5 jaar 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...

meer dan 5 jaar ago | 1

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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...

meer dan 5 jaar ago | 0

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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...

meer dan 5 jaar ago | 1

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table2char(data,varargin)
Converts a table or dataset to a formatted character matrix.

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printFigs2Files(varargin)
Print figures to files in several formats for publication.

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onoffids2logical(onOffIds, varargin)
Convert start and end ids of events to logical indicator array.

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 ...

ongeveer 6 jaar ago | 1

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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>|. ...

ongeveer 6 jaar 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...

ongeveer 6 jaar ago | 1

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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)...

ongeveer 6 jaar ago | 0

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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...

ongeveer 6 jaar ago | 0

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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 |...

ongeveer 6 jaar 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...

ongeveer 6 jaar 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 ...

meer dan 6 jaar 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...

meer dan 6 jaar ago | 3 answers | 0

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Replace 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...

meer dan 6 jaar 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

meer dan 6 jaar ago | 1

Submitted

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 ...

meer dan 6 jaar ago | 0