Stephen23

Attivo dal 2014

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Update an Excel file after each Matlab calculation
You can use a COM server to trigger Excel to recalculate the worksheets: https://www.mathworks.com/matlabcentral/answers/100938...

1 giorno fa | 0

Risposto
Error using (function_name). Too many output arguments.
You did not define the function to return any output arguments: function calcolo_cp(T,fluido) If you intended to return e.g. C...

2 giorni fa | 2

Risposto
Vectorize nested for loops with indices and subscripts
A = [1,2,0,2;2,1,3,0;0,3,1,3;2,0,3,1] matArray = unifrnd(-1,1,[4,4,10]) Method one: [X,Y] = meshgrid(1:size(matArray,3),A(:))...

2 giorni fa | 0

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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 ...

4 giorni fa | 0

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Risposto
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...

4 giorni fa | 2

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Risposto
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.

4 giorni fa | 1

Risposto
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....

6 giorni fa | 0

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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...

8 giorni fa | 0

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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...

11 giorni fa | 0

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Risposto
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)

11 giorni fa | 0

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Risposto
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...

12 giorni fa | 0

Risposto
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...

14 giorni fa | 0

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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 ...

16 giorni fa | 0

Risposto
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...

16 giorni fa | 0

Risposto
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);...

18 giorni fa | 0

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Risposto
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))

18 giorni fa | 0

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Risposto
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...

18 giorni fa | 0

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Risposto
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)

20 giorni fa | 0

Risposto
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...

21 giorni fa | 1

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Risposto
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...

21 giorni fa | 1

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Risposto
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...

22 giorni fa | 1

Risposto
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/...

23 giorni fa | 1

Risposto
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 ...

25 giorni fa | 0

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Risposto
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...

29 giorni fa | 1

Risposto
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]),[...

30 giorni fa | 2

Risposto
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...

circa un mese fa | 1

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Risposto
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...

circa un mese fa | 0

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Risposto
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...

circa un mese fa | 1

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Risposto
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...

circa un mese fa | 0

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Risposto
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; ...

circa un mese fa | 1

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