Cedric Wannaz
Last seen: 2 dagar ago
855 total contributions since 2013General interest: interdisciplinary approaches to complex problems (in particular mixing Mathematics, Physics, and Computer science).
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how is imwrite() in Matlab2020a saving RGB?
You are saving as a jpeg file, which is lossy by default. If you save as .png for example (lossless), there will be no differen...
9 månader ago | 0
Can't call function within class
You forgot to bracket the output args, and the semi-column is useless: function [resamp_x,resamp_y] = resamp_sig(obj)
9 månader ago | 0
| accepted
Matlab: Select a variable name and find the corresponding value
Here is one way: content = fileread( 'myTextFile.txt' ) ; match = regexp( content, '(?<=\$_Wk1_lr_m,\s+str\s*=\s*''\s*)[^\s'...
9 månader ago | 0
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video in a figure
The reason is indicated in the doc: "The movie function uses a default figure size of 560-by-420 and does not resize figures to ...
11 månader ago | 0
I have been getting error 377 for weeks now. How do I fix this issue?
You could follow the instructions for manual activation provided in the thread referenced in this answer.
11 månader ago | 0
extract data from EEG text file
Using the data text file that you provided elsewhere (renamed and attached to this answer), here is a short example of one way t...
mer än ett år ago | 1
| accepted
How to sum repeated adjacent values in a vector
Here is one way: Y = splitapply( @sum, X, [0, cumsum( diff(X) ~= 0 )] + 1 ) ; or, split into two expressions that make it easi...
mer än ett år ago | 2
Comparing Data sets with same numbers of Array
As you have no N-NE direction, here is an example for SE-S: dayId = [1, 5, 10, 15, 50, 60, 92] ; cat_sub = cat_wind_direct...
mer än ett år ago | 0
| accepted
How do I extract points from multiple circles?
We cannot test without your data, but the approach seems fine. You could use the PDIST2 function and extract everything in one s...
mer än ett år ago | 1
| accepted
python with matlab, undefined variable py?
Try going through: https://www.mathworks.com/help/matlab/matlab_external/undefined-variable-py-or-function-py-command.html and ...
nästan 2 år ago | 0
How to slice each string in a string array without using for loop
If you favor performance over readability/maintainability, you can build an approach around the following: buffer = vertcat(...
mer än 2 år ago | 4
| accepted
How to retrieve z value from surf plot given x and y?
Interpolate with |INTERP2| : <https://www.mathworks.com/help/matlab/ref/interp2.html> where |Xq| and |Yq| are defined using t...
mer än 2 år ago | 0
| accepted
Writing a loop to calculate a seasonal cycle and then plot the seasonal cycle?
Where is |t| defined? In addition, |month_mean| is your intermediary variable; you want to plot either |seasonal_cycle| or |s_cy...
ungefär 3 år ago | 0
How to read large text data into matlab
If you have enough RAM for this, the following could run a little faster. It is way less versatile than Per's solution though, a...
ungefär 3 år ago | 1
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How can I create a matrix with the values of the elements is a function of the indices?
Not sure that I understand. If you wanted to create a rectangular array whose elements are a the result of some arithmetic opera...
ungefär 3 år ago | 0
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Strfind to contain complex pattern
Here is an approach: str = 'John played volleyball. I love Anna. Are you there?' ; buffer = strtrim( strsplit( str, {'....
ungefär 3 år ago | 0
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Rearrange cell content by groups
Hi |dpb|, Assuming that you have a cell array (and that you are using this _table type of output_ just for a _display purpose...
ungefär 3 år ago | 0
Question
Solving A{k} * x + b = 0 for large numbers of A{k} with same structure/filling.
Dear all, I am trying to improve the efficiency of solving |A{k}*x+b=0| for |x|, that I currently solve using the...
ungefär 3 år ago | 2 answers | 0
2
answersQuestion
Should I (and how to) avoid "forests" of listeners in nested OOP structure.
Dear all, I never used more than the basics of events and listeners, and I could benefit from the input of ...
ungefär 3 år ago | 0 answers | 0
0
answersQuestion
Dynamic superclass name in call to superclass method.
Dear all, In a particular context, I could benefit from being able to use _"dynamic superclass naming"_ in calls...
ungefär 3 år ago | 0 answers | 2
0
answersQuestion
Error management in OOP framework.
Dear all, I am trying to implement an error management mechanism that allows building very detailed error r...
ungefär 3 år ago | 1 answer | 1
1
answerHow to vertcat 100 matrices ?
If they are stored in cell array |M|: Mvcat = vertcat( M{:} ) ; where |M{:}| is what we call a _comma separated list_ (CS...
ungefär 3 år ago | 1
| accepted
print leading and trailing zeros into text file
>> dec2hex(195112160, 8) ans = '0BA12CE0'
ungefär 3 år ago | 0
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Finding and saving identical rows in a matrix
Alternatively: [~, ~, ic] = unique( A(:,1:2), 'rows' ) ; groups = splitapply( @(x){x}, A, ic ) ; produces groups = ...
ungefär 3 år ago | 1
| accepted
How extract sub matrix without zeros from a big matrix
Here is an example; we first build a test data set: >> N = randi( 10, 10, 4 ) ; >> for k = 1 : 10, N(k,1+randi(3,1):end) =...
ungefär 3 år ago | 2
| accepted
How to remove repeating elments from a matrix?
Almost, the idea was correct but you were not working on the correct dimension. Also, sorting the input array vertically makes c...
ungefär 3 år ago | 0
| accepted
sum of matrix omitting one dimension
Here is one way, but there is probably a simpler approach: buffer = arrayfun(@(k) permute(KL, circshift(1:ndims(KL), k-1)), ...
ungefär 3 år ago | 0
Split array into cell arrays of different size
>> seqs = mat2cell( A, 1, diff( [strfind(A, [5,19]), numel(A)+1] )) seqs = 1×5 cell array {1×4 double} {1×3 doub...
ungefär 3 år ago | 0
Find if two sparse matrix have 1 in same position
Do you need something along this line? % - Build small test case. A = sprand( 4, 5, 0.5 ) > 0 ; % 4x5 sparse. B =...
ungefär 3 år ago | 0
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How to import Text File with 2 different Delimiters (how to organize header data and numeric data)
You may not need to use header information for parsing your file. Look at this example (applied to |data.txt| attached): ...
ungefär 3 år ago | 0
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