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Jan


12,404 total contributions since 2009

It is easier to solve a problem than to guess, what the problem is.

Questions about FileExchange submissions are welcome - get my address from the code. I do not answer mails concerning questions in the forum.

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Answered
How do I convert to Mex from Cpp using Xcode ver 10
Wow, what an inefficient communication. As Walter has said already, the line const int *DimsBness; must be changed to co...

1 day ago | 0

Answered
Access index in cells.
What ever app.subImage was before, after: app.subImage = round(app.SliderChosenCell.Value); it is a scalar number with an inte...

1 day ago | 0

Answered
Graph with string variable
You did not even make an attempt? data = readmatrix('data.xlsx'); plot(data(:, 1), data(:, 2), 'r', ... data(:, 1), data...

1 day ago | 0

Answered
Need help creating a for loop
v = nonzeros((5:5:95).' .* fliplr(triu(ones(19)))).'

2 days ago | 0

Answered
How to write strings and numbers to a text file
Do you really want to create: *DIM,table_press_data_1,TABLE,6146,120,1,PN,PT *TREAD,table_press_data_1,'press_data_1','csv',''...

2 days ago | 0

Answered
Why is ODE45 using so many intervals?
Do you want to reduce the number of evaluated steps to reduce the processing time, or is it enough to reduce the size of teh out...

3 days ago | 1

Answered
Rotating 3D cloud matrix data
Multiplacte the data with a rotation matrix, e.g. obtained by: https://www.mathworks.com/matlabcentral/fileexchange/66446-rotati...

3 days ago | 0

Answered
What is the efficient way to parse file without fscanf or testscan
I've created a test file at first: fid = fopen('myfile.txt', 'w'); fprintf(fid,'%.0g %16f %16f %16f %8f %8f\n', rand(6, n)); ...

4 days ago | 0

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Answered
How can I convert a binary fraction to decimal?
'11001' means: 1*2^0 + 0*2^1 + 0*2^2 + 1*2^3 + 1*2^4 or: [1,1,0,0,1] * 2 .^ (4:-1:0).' (this is what happens inside bin2dec - ...

4 days ago | 2

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Answered
Gridlines when exporting .pdf in Word 2016
You can replace the grid my drawing the lines manually with the wanted color. Would this solve the problem? aAxesH = axes('Next...

4 days ago | 0

Answered
How do you remove duplicates of nested cells?
A loop appraoch: C = RomanticGestures; n = numel(C); remove = false(1, n); for i1 = 1:n for i2 = i1 + 1:n if ~...

5 days ago | 0

Answered
"not equal to" in MATLAB
Several possible ways: if 1 ~= 2 if not(1 == 2) if ~(1==2) if ne(1, 2) if ~eq(1, 2) if 1 - 2 % Implicitly eva...

6 days ago | 2

Answered
Parameter in my ode
See Answers: Anonymous functions for parameters and https://www.mathworks.com/help/matlab/math/parameterizing-functions.html (y...

6 days ago | 1

Answered
How to generate random points within 3d pyramid
See: https://www.mathworks.com/matlabcentral/answers/327990-generate-random-coordinates-inside-a-convex-polytope https://www.m...

8 days ago | 0

Answered
desactivation of the "MATLAB system error" dialog box ?
I'm running a long test also. The code displays some logging messages every few seconds. A second Matlab session takes a screens...

8 days ago | 0

Answered
How can I add a line to an imagec figure?
Maybe (see my comment above): line(t([3952, 3952]), altitude([1, end]))

8 days ago | 0

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Answered
How do I add an additional column to a cell array based on existing values in another column?
x = {'asd', 1; ... 'bsd', 0}; x(:, 3) = num2cell(1 - cell2mat(x(:, 2))) % or: Value = {0, 1}; x(:, 3) = Value(2 - ce...

9 days ago | 0

Answered
Strategies for reducing calculation time: Finding values in a large array
[uniqID, ~, index] = unique(RawData(:, 1)); avg = accumarray(index, RawData(:, 2), [], @mean); result = [uniqID, avg]; Do ...

9 days ago | 0

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Answered
Rolling-window matrix with different intervals between columns.
vec = [1 2 3 4 5 6 7 8 9 10 11 12 13]; n = numel(vec); step = 3; width = 4; col1 = 1:step:n - width + 1; row1 ...

9 days ago | 0

Answered
Index exceeds number of array elements (181)
Use the debugger to examine the cause of the problems. Type this in the command window: dbstop if error Then run the code agai...

9 days ago | 0

Answered
Mathematics of the bandpass function
The documentation explains: bandpass uses a minimum-order filter with a stopband attenuation of 60 dB and compensates for the d...

9 days ago | 0

Answered
Fast Elementwise Matrix-Multiplications
Of course times is implemented efficiently already and most likely it does use the MKL, but this is not documented and a reverse...

9 days ago | 1

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Answered
a 2D into a 3D Array
Prefer Shunichi Kusano's solution. But for completeness: ini = 1; fin = 9; a = zeros(9, 2049, 3867); m = size(PICT, 1); ...

9 days ago | 1

Answered
Difficulty to get the results by using repmat function
I'm not sure, what you are asking for. With some guessing: a1 = eomday(d(:,1),d(:,2)); index = repelem((1:size(b, 1)).', a1...

10 days ago | 0

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Answered
How to use matlab to call c + function file and draw?
What about converting the code to Matlab? This is more or less trivial: function cdValue = yourFcn(Kc, Re) cdValue=0.0; % Do ...

10 days ago | 0

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Answered
Variable is in a function file, how do I use a loop to change the value of this variable?
Do not redefine the important Matlab function cd as a variable, because this can cause serious troubles during debugging. [T,Z]...

10 days ago | 1

Answered
Matlab Novice here - struggling to truncate a column array
cellfun(@(x) x(18:19), C, 'UniformOutput', false)

10 days ago | 0

Answered
Data Tips -- Add Row Error
Did you read the example https://www.mathworks.com/help/matlab/creating_plots/create-custom-data-tips.html and https://www.mathw...

10 days ago | 0

Answered
create vector from 21 individual values from for-loop
K = zeros(1, 21); % Pre-allocation for ii = 1:21 K(ii) = rand; % Insert your calculations here end If you post your co...

10 days ago | 0

Answered
Errors after removal of appdata folder
The question is very vague. "unique() function isn't working properly" doies not contain any detail which would allow to underst...

10 days ago | 0

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