Answered
Add value in vector and use it as input for the next row
S = [1,1,1,0,1,0]; E = [4,2,5,10,2,3]; k = 10; X = S==1; Z = S; Z(X) = k+cumsum(E(X))

4 years ago | 0

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Answered
Get all files under a folder
Just filter out the folders afterwards: P = uigetdir(pwd,'Select a folder'); S = dir(fullfile(P,'*')); S([S.isdir]) = [] % re...

4 years ago | 0

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Answered
how to split a string (char value) with zero in front of it but showing the value in the matrix?
S = '0100'; V = sscanf(S,'%1u')

4 years ago | 1

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Answered
Add indicative labels to vector values
A1 = [1;2;3]; A2 = [4;5;6]; A1(:,2) = 0; A2(:,2) = 1; A = [A1;A2]

4 years ago | 0

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multiplication of a 3-D matrix by a 1-D array
You don't need a special kind of multiplication, you just need to match the vector orientation to the array: C = A .* reshape(B...

4 years ago | 0

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Answered
Find index of a structure with multiple conditions of multiple fields
S.liste.a = linspace(1,30,5); S.liste.b = linspace(1,60,5); S.liste.c = linspace(1,80,5); X = S.liste.a<10 & S.liste.b<50 & S...

4 years ago | 0

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Answered
Retrieve multiple fields with similar names from a struct
Instead of forcing meta-data (i.e. pseudo-indices) into the fieldnames, why are you not simply using a non-scalar structure? The...

4 years ago | 1

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Answered
Making Matrix dimensions agree
x=-2:0.04:2; y=-4:0.04:4; [X,Y] = meshgrid(x,y); fXY = X.*exp((-X.^2)-(Y./2).^2); % use X and Y here, not x and y. surf(X,Y,...

4 years ago | 2

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Answered
Merge rows of cell array with strings per column?
C = {'A','C'; 'B','D'} D = cellfun(@(c)join(c,''),num2cell(C,1)) D = cellfun(@(c)[c{:}],num2cell(C,1),'uni',0)

4 years ago | 0

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Answered
How do I split a vector into parts using indexes?
x = 1:100; y = [10,40,60]; C = mat2cell(x(1:y(end)),1,diff([0,y]))

4 years ago | 0

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Answered
Could not recognize the format of the date/time text
C = ["07/04/2021 07:55:27.502.118" "07/04/2021 07:55:27.502.196" "07/04/2021 07:55:27.502.274" "07/04/2021 07:55:...

4 years ago | 0

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Answered
extract number of columns in each row
Where C is your cell array: V = cellfun(@numel,C) V = cellfun('size',C,2)

4 years ago | 1

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Answered
Function that outputs a varying number of variables depending on input --> N inputs = N output variables
"To my understanding I would be unable to use alternate methods given that the data I am loading are mutlidimensional arrays of ...

4 years ago | 0

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Answered
To write a For loop in which a variable is updated with each run.
"I want to make this more efficient by using a for loop (if it can be done)." Of course it can be done, you just need to avoid ...

4 years ago | 0

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Using an array as an element in a function.
Use element-wise division ./ not matrix division / You will probably also need to use element-wise power .^, not matrix power ^...

4 years ago | 0

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create cell array by extracting all the same row from multiple matrix
"Is this achievable through cellfun?" Yes: A = rand(105,3); B = rand(105,3); C = rand(105,3); D = cellfun(@vertcat,num2cell...

4 years ago | 0

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Answered
I want to enter a mathematical function as an argument to a function
The simple approach using a function handle: plot_compare(@sin , 5 ,20); plot_compare(@(t) 4*t+9 , 5 ,20); function plot_co...

4 years ago | 0

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Answered
How to create a table from strings and numerical data?
" I don't want to preallocate anything as the sizes are unknown. I wanna start with an empty table and then after first iteratio...

4 years ago | 0

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Plot the last value from each cell from excel file
"Could you please provide me the best way to extract the last values in each cell and plot it?" Sure, I already did that sixtee...

4 years ago | 0

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Answered
Alternative to Eval for small number of variables
Approaches like EVAL and structure fields for this task are far too complex. You need to learn how to use arrays to write simpl...

4 years ago | 0

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Convert input item into string
https://www.mathworks.com/help/matlab/ref/inputname.html

4 years ago | 1

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Extract value until regexp case match
Does the data you want to match always occur at the start of the string? A = "9/12/2022 7:38:51 PM 216 Indicator"; B = regexp(...

4 years ago | 1

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Answered
Sine Function I'm trying to Plot won't show up
"Not sure what I'm doing wrong here." You need to use element-wise division, not matrix division: phi = 0:0.1:6*pi; I2 = sin(...

4 years ago | 1

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Answered
replacing text in a string using indexing
For overlapping matches use STRREP. For non-overlapping matches use REGEXPREP: regexprep('qqqqqq','qqq','qwe') regexprep('qqq...

4 years ago | 0

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How can I discretize data by their sign?
A = [-2,-1,5,-10,7,3,-9,-12,11]; B = sign(A); C = cumsum(logical([1,diff(B)]))

4 years ago | 0

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Answered
Skipping certain lines using fscanf
C = {}; [fid,msg] = fopen('polydata.txt','rt'); assert(fid>=3,'%s',msg) while ~feof(fid) C{end+1} = sscanf(fgetl(fid),'%...

4 years ago | 0

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Creating Own Time Variable from Datetime Data
"I hope someone can help me convert my datetime time variable into working with a new time variable, thanks. " Your question do...

4 years ago | 0

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Answered
How inv() works ?
The INV documentation states "inv performs an LU decomposition of the input matrix (or an LDL decomposition if the input matrix ...

4 years ago | 1

Answered
Convert matrix into CSV, with each matrix element as a separate line including indices of matrix element
M = [0.5,0.1,0.6;0.9,0.8,0.3] N = M.'; S = size(N); [X,Y] = ndgrid(1:S(1),1:S(2)); writematrix([X(:),Y(:),N(:)],'test.txt') ...

4 years ago | 1

Answered
Why does the code have Check for incorrect argument data type or missing argument in call to function 'zero'?
Change the function from ZERO to ZEROS. ZEROS creates an array of the value 0: https://www.mathworks.com/help/matlab/ref/zeros....

4 years ago | 1