# Stephen23

Actif depuis 2014

Followers: 7   Following: 0

Suspensa Vix Via Fit

All

#### Feeds

Afficher par

Réponse apportée
How to replace values in a table with the outputs of another code?
Use curly brace indexing to access the content of the table: https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a...

3 jours il y a | 0

| A accepté

Réponse apportée
Matlab function only giving me 1 output
"why is my Vmax just giving me 1 value." Because you used mrdivide / (matrix right division) instead of rdivide ./ (array right...

3 jours il y a | 2

Réponse apportée
Customizing plots that are matrices of column vectors?
X = 1:9; Y = rand(9,2); S = scatter(X,Y); set(S,{'Marker'},{'o';'*'})

6 jours il y a | 1

Réponse apportée
How to use lazy quantifiers in look ahead?
Regular expressions are the wrong tool for this. It might be possible with some effort, but personally I would just use the corr...

7 jours il y a | 0

| A accepté

A soumis

Interactive Regular Expression Tool
Develop and refine regular expressions in an interactive figure that shows all of REGEXP's outputs.

8 jours il y a | 12 téléchargements |

Réponse apportée
Loop through a table using a specific condition and generate new table satisfying the particular condition
ID = ["ID1";"ID1";"ID2";"ID3"]; Value = [5;7;3;1]; T = table(ID,Value) G = groupsummary(T,'ID','sum')

10 jours il y a | 0

Réponse apportée
locate within the first column of a matrix a sequence of numbers and extract those rows
Use DIFF, which is a key MATLAB function. M = load('M.mat').M X = diff([0;find(diff([M(:,1);0])<0)]); Y = size(M,2); C = mat...

17 jours il y a | 0

| A accepté

Réponse apportée
Rearrange elements of matrix based on an index matrix
Yes, it is awkward. x=randn(5,3) z=randn(5,3) [~,I] = sort(x,2) Perhaps S = size(I); [R,~] = ndgrid(1:S(1),1:S(2)); J = s...

20 jours il y a | 0

| A accepté

Réponse apportée
Is this a bug of MATLAB?
"I think the correct answer should be longer. Is it a bug or an expected behavior?" It is not a bug: the default number of dig...

21 jours il y a | 1

| A accepté

Réponse apportée
converting string to num and table
Tip for the future: upload your raw data, not a data extract that you have already imported and modified. S = load('sample1.mat...

24 jours il y a | 1

| A accepté

Réponse apportée
Faster alternate to all() function
N = 10000; varname = rand(246658,4) idxkeep = randi(size(varname,1),1,N); tic for i=1:N idx = idxkeep(i); idy = ...

25 jours il y a | 1

| A accepté

Réponse apportée
Finding mean value over certain amount of values in a matrix
Avoid SQUEEZE. More robust: A = [1,2,3;4,6,8;7,12,7;14,4,23] N = 2; C = size(A,2); B = reshape(mean(reshape(A,N,[],C),1),[],...

25 jours il y a | 2

Réponse apportée
subdivide numbers inside a file .xlsx
Simpler: C = readcell('file.xlsx'); M = str2double(split(C(6:end),', ')) T = array2table(M, 'VariableNames',split(C(5),', '))...

26 jours il y a | 0

Réponse apportée
Your variables are reaching 2GB limit,revert to save -v7.3 This will be slower but avoids matlab not saving the data.
"How should I resolve this?" Specify the version when calling SAVE: save(.. , '-v7.3')

environ un mois il y a | 0

Réponse apportée
How to open and modify .dat file
unzip nema.zip fid = fopen('nema.dat','rb'); arr = fread(fid,'int8'); fclose(fid); dim = [364,364,110]; arr = reshape(arr,d...

environ un mois il y a | 0

| A accepté

Réponse apportée
unique across tables within table
U = unique(vertcat(RawFileIndex.Parameters{:}).ID)

environ un mois il y a | 0

| A accepté

Réponse apportée
Finding multiple Matrix in a txt file
"For example (in my own dumb coding brain) I would like matlab to "Search a txt file that has a certain name that the user can s...

environ un mois il y a | 1

Réponse apportée
how to make the numbers on the matrix with alternative sign?
n = 5; m = toeplitz([2,1,zeros(1,2*n-2)]) .* -(-1).^gallery('minij',2*n)

environ un mois il y a | 0

Réponse apportée
Adding column in cell array before converting to a matrix.
Here are a couple of approaches. First lets create some fake data: C = {randi(9,3,2),randi(9,2,2),randi(9,4,2)} C{:} Method o...

environ un mois il y a | 0

| A accepté

Réponse apportée
readtable struggling to interpret spreadsheet as numbers
"readtable struggling to interpret spreadsheet as numbers" Unfortunately due to that broken CSV format we need to import everyt...

environ un mois il y a | 0

| A accepté

Réponse apportée
How to convert datetime into a number?
txt = '08-Jan-2016 05:40:00' dtn = datetime(txt,'InputFormat','d-MMM-y H:m:s', 'Format','yyyyMMddHHmmss') https://www.mathwork...

environ un mois il y a | 0

Réponse apportée
Creation of binary coded image from a matrix
A = [0,2;1,3;7,14] Method one: BLOCKPROC (requires image toolbox, probably not very fast): F = @(s)reshape(dec2bin(s.data,4)-'...

environ un mois il y a | 1

Réponse apportée
How to convert numbers to text
v = fix((0:14)./5).' w = char(v+'x')

environ un mois il y a | 0

| A accepté

Réponse apportée
How to search for table column via a string
y = rawTable.(string); % ^ ^ https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-table.html

environ un mois il y a | 1

| A accepté

Réponse apportée
How to use indices of one matrix as entries of another matrix?
Fake data: M1 = reshape(randperm(256)-1,16,16); Y = find(M1==hex2dec('34')); M1([1,Y]) = M1([Y,1]) Convert: C = 1+mod(M1.',...

environ 2 mois il y a | 0

| A accepté

Réponse apportée
Save in an array lines after the appearance of a text pattern
txt = fileread('File.txt') rgx = 'Cell\s*\(Angstrom\):(\s+\S+){9}'; tkn = regexp(txt,rgx,'once','tokens'); mat = sscanf(tkn{1...

environ 2 mois il y a | 0

Réponse apportée
Reading unformat text file with strings and numbers
In lieu of a sample data file provided by the OP I created my own... Lets try importing it using READTABLE and a few options: ...

environ 2 mois il y a | 1

| A accepté

Réponse apportée
How can I iterate through an array using a for loop?
Given an array of paths: C = {'C:\Users\me\Documents\My Info','C:\Users\me\Documents\My data'}; F = @(p)dir(fullfile(p,'*.xlsx...

environ 2 mois il y a | 0

Réponse apportée
Store a script as a function
If you want to call RANDOMSTART from e.g. another function or from the command line then it must be a function. What you have is...

environ 2 mois il y a | 0

| A accepté

Réponse apportée
Collect information of a file with the same kind of text pattern
txt = fileread('file.txt'); rgx = 'Cr(\d+)\s*Cr(\d+)\s*\(\s*(\S+),\s*(\S+),\s*(\S+)\).+@.*\n.+\n.+\n[^:]*:\s*\(\s*(\S+)\s+(\S+)...

environ 2 mois il y a | 2

| A accepté