Answered
How I can detection column indexes of string 'rk_accept_metaln' (n=1,2,3,4....)
C = {'X','Y','Z','X_size','Y_size','Z_size','volume','block_tonnage','rk_accept_grade1','rk_accept_metal1','rk_rejected_grade1',...

5 years ago | 0

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Answered
Compute the mean row cell elements in a cell array.
Where C is your cell array: fun = @(varargin)mean(cat(3,varargin{:}),3); D = cellfun(fun,C(1,:),C(2,:),C(3,:),'uni',0)

5 years ago | 1

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Answered
How to index array with an array?
u = [11,12,13;21,22,23;31,32,33] % Access element at row 2, column 1 id = [2,1] ic = num2cell(id); u(ic{:}) https://www.mat...

5 years ago | 0

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Answered
How to I call specific values from a 45x1 Matrix?
link_forces = solution([3,5,14,17,25,28]) See: https://www.mathworks.com/company/newsletters/articles/matrix-indexing-in-matlab...

5 years ago | 0

Answered
Assign a cell data that starts with a regular expression
Always LOAD into an output variable! That will make your code much more reliable, and makes this task easier. Method 1: the sim...

5 years ago | 0

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Answered
Removing zeros from matrix
A = [1,2,3,4,5,6;1,2,3,4,5,6;1,2,3,4,5,0;1,2,3,4,0,0;1,2,3,0,0,0] Method one: NONZEROS and CELLFUN baz = @(v)v(end); fnh = @(...

5 years ago | 2

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Answered
How to distribute elements of a vector to each of output variable?
You can use a comma-separated list: x = [1,2,3,4,5]; c = num2cell(x); [a,b,c,d,e] = c{:} https://www.mathworks.com/help/matl...

5 years ago | 0

Answered
Explain why it makes sense that matrix A( :, :, 1) is two-dimensions, while A( :, 1, :) and A(1, :, :) return three dimensions
So far no one has really answered why this makes sense, which is what the original question asked. "My question was more about ...

5 years ago | 0

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Create loop to load .mat file and store values to a matrix.
This should get you started. In the absence of any data desription I assumed that withinin each file x and y are scalar. You wil...

5 years ago | 0

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Answered
Splitting a table using varagin
"The matlab documentation states that the first term in the bracket after splittaply should be a function such as @max" The SPL...

5 years ago | 0

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Answered
Use a ready p-file to operate on matrices
Your approach is complex, obfuscated, and inefficient. Using numbered variables is a sign that you are doing something wrong. R...

5 years ago | 1

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Answered
Convert time in decimal days into hh:mm:ss format
N = 0.504513888888889; T = days(N); T.Format = 'hh:mm:ss' or D = datetime(N,'ConvertFrom','excel'); T = timeofday(D)

5 years ago | 0

Answered
Extracting numerator and denominator values from a decimal value
[N,D] = rat(6.52) Multiply both by four if you want to.

5 years ago | 1

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Answered
Efficiently identifying a set of 1s: follow up question after months later
A simpler, more efficient, much more robust solution: a = [1,1,1,-1,0,0,0,0,1,1,-1,0,0,1,1,1,1,-1,0,0]; d = diff([false,a==1,f...

5 years ago | 0

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Answered
Any efficient way to identify a set of 1s in a big array?
A simple, efficient, robust solution: a = [1,1,1,-1,0,0,0,0,1,1,-1,0,0,1,1,1,1,-1,0,0]; d = diff([false,a==1,false]); s = fin...

5 years ago | 0

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Answered
Problem with datetime in German
There does seem to be a problem with DATETIME handling the period characters (below). Workaround: replace/remove the period cha...

5 years ago | 0

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Answered
Storing many digits using readtable
Any advice that "you are going to need to read the file as text" is incorrect. It is much better to import and store numeric da...

5 years ago | 0

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Answered
How to see if characters are present in a string array.
Assuming that all string elements contain exactly the same number of characters, then you can do this easily with basci logical ...

5 years ago | 0

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Answered
Subtracting Matrices in Special way
If the A values are copied first then only two ISMEMBER are required (simpler, more efficient), nor any resizing or changing of ...

5 years ago | 1

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How do I get values of a certain parameter in a multi-dimensional matrix?
a(~Ind) = NaN

5 years ago | 0

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Answered
Display file names from current directory if more than n characters
n = 5; P = 'absolute or relative path to where the files are saved'; S = dir(fullfile(P,'*.*')); C = {S(~[S.isdir]).name}; % ...

5 years ago | 0

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Answered
Comparision double values 135 with 135.0000
" A comparision with a simple if-statement and the == operator does not succeed." Yes, it does succeed: their values are differ...

5 years ago | 0

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Answered
Is it possible to fprintf/sprintf each row of elements in a vector using loop?
I would not use a loop: N = ["Earth"; "Venus"; "Mars"]; V = ["1.0000"; "0.8975"; "0.3915"]; fprintf('%s %s Gravity\n', [V(:),...

5 years ago | 2

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Answered
How can I import a file.txt and extract data?
opt = {'CollectOutput',true}; [fid,msg] = fopen('prova2.txt'); assert(fid>=3,'%s',msg) hdr = fgetl(fid); out = textscan(fid,...

5 years ago | 1

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Answered
Find values that are greater than a specific number in a table
nnz(Lake>=20)

5 years ago | 0

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Answered
Directly perform a multiplication on certain variables in a table
T = cell2table({'a',1,2;'b',3,4;'a',5,6},'VariableNames',{'x','y','z'}) idx = strcmp(T.x,'b'); T{idx,{'y','z'}} = T{idx,{'y','...

5 years ago | 0

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Answered
Recording vectors in for loop, when the loop is running in a range starting with negative numbers
Data are not indices, do not mix them up. V = -nmax:1:nmax; % data!!!! for k = 1:numel(V) % indices!!!!! n = V(k); % data...

5 years ago | 0

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Answered
How can I ask Matlab to adjust a parameter in an equation until the answer becomes equal with a predetermined input value?
Use FZERO: https://www.mathworks.com/help/matlab/ref/fzero.html Define a simple anonymous function with one input which calcula...

5 years ago | 1

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Answered
Conditions else if - efficiency advice
inp = '003'; % S group subS = {'001','002','003'}; aS = {'R','O','O'}; % T group subT = {'01','02','03'}; aT = {'O','O','R...

5 years ago | 0

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Answered
Calculate this matrix in a more general and shorter way
x = rand(100,1); w = pi; m = (1:5).*w.*x; m = [ones(100,1),reshape([cos(m);sin(m)],100,[])]; for comparison: P = [ones(size...

5 years ago | 1