Stephen

2014 이후 활성

Suspensa Vix Via Fit

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How do I convert a 2d matrix to a 3d matrix and vice versa efficiently?
format compact A(:,:,1) = [1,2;3,4;5,6]'; A(:,:,2) = [10,20;30,40;50,60]'; A(:,:,3) = [11,21;31,41;51,61]'; A(:,:,4) = [100,...

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Numeric to Ordinal-String
Convert numeric values to a string array of integers with ordinal suffixes. Fully vectorized!

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Number to Yllion
Convert a number to text giving the value using Donald Knuth's Yllion naming scheme.

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How to find the index of the minimum value in a matrix.
Where M is your matrix: [R,C] = find(M==min(M(:))) or [~,X] = min(M(:)); % or [~,X] = min(M,[],'all','linear'); [R,C] = ind2...

3일 전 | 1

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Get all unique combinations of 2 columns from a table
V = {'Item1','Item2','Item3','Item4'}; T = table(1, 5, 7 ,10, 'VariableNames',V) X = nchoosek(1:numel(V),2); D = diff(T{:,V}(...

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How do I transform this format 202007011030 (2020 07 01 10:30) into a readabel format?
You can easily import as DATETIME, no need to import as text nor fiddle around with text: fid = fopen('Fehmarn_Wind_date.txt','...

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How to create a 3D matrix from subtracting 2D matrices (like creating 2D matrix from subtracting vectors)?
C = permute(A,[1,3,2]) - permute(B,[3,2,1])

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Reading text file data with different data formats
Move the "header" to the top: txt = fileread('sample test data.txt'); [hdr,spl] = regexp(txt,'^#[^\n]+','match','split','linea...

3일 전 | 1

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Use of assignment '=' in plot command?
That name-value sytnax was introduced in R2021a: y=1:10; plot(y,'.-',linewidth=2) % ^^^^^^^^^^^ this syntax introdu...

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Write sections of a long string as new lines in a text document
sub = 'XYZYXYZYZYZXYZYXYZ0XYXYXYX'; tmp = split(sub,'0'); fprintf('%s\n',tmp{:})

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How to save a matrix data with a concatenated variable name?
It is simpler and more efficient to use a structure: C = {'PrimSpeed','SecSpeed'}; S = struct(); for k = 1:numel(C) ...

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Find corresponding element in same row as given value in matrix
Assuming that A and B are you matrices, and that the Y values are in the second columns: [valA,idx] = max(A(:,2)) valB = B(idx...

7일 전 | 0

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What is the best practice to recursively extract data from a nested structure in matlab?
S=struct(); S.case='1'; S.type='A'; S.values.model1.case='2'; S.values.model1.type='C'; S.values.model1.values.mission.case...

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Identifying numbers within a long string containing multiple occurrences of text and numbers in one row
Simpler and gives the requested output: str = 'x y z p (Pa)...

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Read CSV with yyyyMMddhhmmss and group months
Here is one way to group by month only, ignoring empty lines of the CSV file: str = fileread('sample.csv'); tkn = regexp(str,'...

11일 전 | 0

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using mat2cell
Using NUM2CELL would be simpler: C = num2cell(M,1) But if you insist on using MAT2CELL: C = mat2cell(M,1001,ones(1,10))

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how can i negative all value in a matrix except diagonal?
M = [13.333,5,0,5,3.3333,0;5,27.333,4,10,3.3333,5;0,4,17.846,0,3.8462,10;5,10,0,17.5,2.5,0;3.3333,3.3333,3.8462,2.5,16.346,3.333...

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How to unfold/concatenate a 3D Matrix?
Making some guesses about the order you want, where A is your array: B = reshape(permute(A,[1,3,2]),[],21)

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Customizable Natural-Order Sort
Alphanumeric sort of a cell/string/categorical array, with customizable number format.

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Natural-Order Filename Sort
Alphanumeric sort of filenames or filepaths, with customizable number format.

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Natural-Order Row Sort
Alphanumeric row sort of a cell/string/categorical/table array, with customizable number format.

12일 전 | 다운로드 수: 24 |

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Problem in properly creating a structure to store data
The simple and efficient approach: P = 'absolute or relative path to where the files are saved'; S = dir(fullfile(P,'*.txt'));...

12일 전 | 0

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Count number of unique .mat files in a folder
The simple MATLAB approach is to use one of the histogram functions rather than a loop, e.g.: % S = dir(fullfile(rootPath,'**',...

12일 전 | 0

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how to know if cell has some empty values
Where C is your cell array: any(cellfun(@isempty,C(:,3)))

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Find index of value extracted from subset in larger set
The simple MATLAB approach is to use indexing: X = 325:400; [p,Y] = min(pvalue(X)); t = tvalue(X(Y));

14일 전 | 0

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How to use regexp in a cell array whose cells may contain cell entries
Your data: S = load('model.subSystems.mat'); model = S.model; Getting indices of nested cells which contain the requested tex...

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How can I create structure entries in a for loop.?
Using a cell array and a structure array: C = {data1,data2,data3}; for k = 1:numel(C) S(k).max = max(C{k}); S(k).min...

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elseif when the flag is not true
" I wanted the else condition to happen only when count1==5*N and the flag condition was not respected." Make the code explicit...

15일 전 | 1

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colon operator returns different answer in command window and script
"colon operator returns different answer in command window and script" Yes, because you called COLON with different values. "W...

15일 전 | 1

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Removing certain type of repeating cell
A direct, intuitive, and reasonably efficient approach is to simply check the existing cell array content: out = Conc(5) fun...

16일 전 | 0

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