Stephen23

Active since 2014

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Answered
Can a custom argument validation function alter the field names of its input variable?
The hard part is not validation, but mapping random fieldnames to your desired fieldnames. Notet that argument validation does ...

ongeveer 19 uur ago | 0

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Answered
How to write all cells of structure in excel sheet ?
Why is a scalar structure nested inside a (pointless) scalar cell array? Why are lots of scalar numerics stored inside a cell a...

ongeveer 22 uur ago | 2

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Answered
Can the software read more precise numbers (such as decimal points)?
Use https://www.mathworks.com/help/matlab/ref/im2double.html before performing any adjustments on the image.

1 dag ago | 0

Submitted

Custom List / Arbitrary Sequence Sort
Sort a text array into the order of custom lists / arbitrary text sequences. Sort words with Latin-, Greek-, and Cyrillic-based ...

2 dagen ago | 3 downloads |

Answered
How to define variable names for resampling?
You should: replace the ISMEMBER with ENDSWITH get rid of those asterisks For example: endsWith(files(i+j).name, {'_B03_10m....

3 dagen ago | 0

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Answered
How should I fix my regular expression to parse this txt file?
"It seems that my regular expression is way too broad and causing this problem." There are several locations where your regular...

5 dagen ago | 0

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Answered
What is the equivalent datetime() call to the clock() function?
Note that DATETIME is an object with properties, so (depending on your requirements) accessing its properties is a simple option...

8 dagen ago | 0

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Answered
How can I convert matrix to cell?
https://www.mathworks.com/help/matlab/ref/mat2cell.html A = reshape(1:40000,100,400)'; C = mat2cell(A,4*ones(1,100),100)

8 dagen ago | 0

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Answered
How to name and save the results using the name of imported file ?
A much better approach is to store the data in e.g. a structure array: P = 'absolute or relative path to where the files are sa...

9 dagen ago | 0

Answered
Question on creating dynamic matrix variables
"Or alternatively, is there a neat way to do so?" Of course there is: indexing. Either into a numeric array or into a container...

11 dagen ago | 0

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Answered
Building an array of strings that might be empty
"What am I missing?" The differences between strings and characters. Do not mix up string arrays with character vectors (which ...

13 dagen ago | 0

Submitted

Maximally Distinct Color Generator
Generate maximally-distinct colors in an RGB colormap.

13 dagen ago | 36 downloads |

Answered
Find a value using an index obtained from a different matrix with same dimensions
The efficient MATLAB approach: tmc = readmatrix('Total_matrix_cases.txt'); tmr = readmatrix('Total_matrix_rotation.txt'); [tm...

13 dagen ago | 0

Answered
Using a menu to generate variables for larger code
For the 1st dialog box: V = str2double(answer); maxvel = V(1); dragco = V(2); width = V(3); mass = V(4); accdur = V(5);...

15 dagen ago | 0

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Answered
3D indices for particular values in a 3D array
Use IND2SUB: X = randi(9,4,3,2) [R,C,P] = ind2sub(size(X),find(X==8))

15 dagen ago | 0

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Answered
how assign cellarray to field Struct
"thank..but it's possible to avoid loop?" Of course (depending on the sizes and classes of APP, SIS, etc): app.Sis = struct('b...

15 dagen ago | 0

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Answered
Generate Array of Random Values
D = sort(randi([-9,9],7,2),2) V = rand(7,13); V = V.*diff(D,1,2)+D(:,1)

17 dagen ago | 0

Answered
Hi, I want to speed up my script with double loop.
X = permute(A,[3,2,1]) + permute(B,[2,3,1]) The data arrangement in memory is not optimal for that operation. Use BSXFUN for ve...

18 dagen ago | 1

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Answered
How to replace exact char in a cell array from another reference cell array
This is difficult because 'x1' is also a substring of 'x10'. But making a few assumptions it might be possible: A = {'x1', 'x10...

18 dagen ago | 1

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Answered
Merge two matrices taking non-Null values
A = [8,8,8,8,NaN;32,32,25,31,NaN;56,56,43,53,NaN;81,80,60,76,NaN;105,103,78,99,NaN;129,127,95,122,NaN]; B = [8,NaN,8,8,8;32,NaN...

19 dagen ago | 1

Answered
Dynamically Make a Variable Name
This is MATLAB so the best solution is to use indexing, just as the MATLAB documentation shows: https://www.mathworks.com/help/...

20 dagen ago | 1

Answered
How to call a function name from function names saved in an array?
prev_output = [1,0,0]; fcs = sprintf('func%s',sprintf('%d', prev_output)); Either use FEVAL: output = feval(fcs,inputs); or ...

22 dagen ago | 0

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Answered
How to use Unicode numeric values in regexprep?
inp = 'Häagen-Dasz'; baz = @(v)char(v(1)); % only need the first decomposed character. out = arrayfun(@(c)baz(py.unicodedata.n...

26 dagen ago | 1

Answered
Cutting (dividing) a matrix into a specific number of rows.
A = [11,12,13;21,22,23;31,32,33;41,42,43;51,52,53;61,62,63;71,72,73;81,82,83]; B = reshape(permute(reshape(A,[],2,3),[1,3,2]),[...

27 dagen ago | 2

Answered
Why does MATLAB not finding a element from my matrix?
Testing for exact equivalence of binary floating point numbers should be avoided. Compare the values, are they actually the sam...

27 dagen ago | 1

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Answered
Question: Structure Array Generation and Dimensions Manipulation
Simple solution: new = [newpop(:);pop(:)] However if you want to your code to be more robust, then you need to preallocate NEW...

27 dagen ago | 0

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Answered
Printing all outputs of the function that has been solved via ode45
This questions gets asked regularly on this forum: users often imagine that there must be some easy way to get some values out o...

28 dagen ago | 1

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Answered
Index exceeds the number of array elements error when using fsolve
Your x0 is a two-element vector, so you told FSOLVE to call the function handle with a two-element vector. But then inside the f...

28 dagen ago | 0

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Answered
How do I plot a tent-map?
"How do I plot a tent-map?" Following the basic definition of tent map: https://en.wikipedia.org/wiki/Tent_map X = 0:0.01:1; ...

28 dagen ago | 1

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Answered
Impossible to set VariableTypes as 'double' for complete array and readtable function
Try something simpler and let READTABLE do the work for you: T = readtable('test_log_1.csv', 'CommentStyle','#', 'VariableNamin...

29 dagen ago | 1

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