Stephen Cobeldick
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7.109 total contributions since 2014Suspensa Vix Via Fit
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How to compare greek letters if they are same
Rather than building maps by hand, I would get Python to do the heavy lifting, e.g.: baz = @(v)char(v(1)); % only need the firs...
circa un'ora ago | 0
How to convert time stamp 11:21:17.155 into seconds in MATLAB??
The most efficient solution: a = '11:21:17.155'; b = [60*60,60,1]*sscanf(a,'%f:')
circa 20 ore ago | 0
Is it possible to make a loop where the the result is separate from the loop and have the result respectively with the input?
Use a cell array to store the data: p = 'Quantity of product you have bought today: '; n = str2double(input(p,'s')); c = cell...
1 giorno ago | 0
| accepted
"If function" can't distinguish i ~= 1.6.
"This weird thing only happens when i=1.6." Nothing weird happens: you generate binary floating point numbers using two differe...
2 giorni ago | 1
| accepted
replacing loop with cell of index values
s = 1:100; c{1} = 1; c{2} = 1:5; c{3} = 2:2:10; out = cellfun(@(x)s(x),c,'uni',0); out{:} A well-written (i.e. correctly p...
4 giorni ago | 1
| accepted
Colors in Matlab as a vriable
Perhaps something like this: M = [1,0,0;... red 1,1,0;... yellow 0,1,0]; % green X = strcmpi(Auto.Farbe,{'red','ye...
8 giorni ago | 0
Opening multiple .csv files using readtable
% opts is unchanged D = 'C:\Users\krist\OneDrive\Documents\MATLAB'; S = dir(fullfile(D,'*.csv')); for k = 1:numel(S) F =...
8 giorni ago | 1
| accepted
How to create matrix with other matrixes by joining them?
a = [1 2 3]; b = [4 5 6]; c = [7 8 9]; d = [10 11 12]; res = reshape([a;c;b;d],2,[])
9 giorni ago | 2
| accepted
saving the data in a variable
"...how to change the name of the file when matlab saves it" That is easy: https://www.mathworks.com/help/matlab/import_export...
9 giorni ago | 0
How to iterate over cell array, creating only unique combinations of cells
data = {1,2;3,4}; n = numel(data); m = nchoosek(1:n,2) % each row is one combination pair. out = data(m) % output [idr,idc] ...
9 giorni ago | 0
| accepted
how to arrange data into array
Without an intermediate sparse array: R = [1;2;3;4]; C = [10;11;13;15]; V = [1e-5;5e-5;10e-5;15e-5]; % S = max([R,C],[],1);...
10 giorni ago | 0
How to count the number of times that values changes?
A = [1;1;1;2;1;3;3;1;1] B = [NaN;cumsum(diff(A)~=0)]
11 giorni ago | 3
| accepted
Getting rid of loops
Logical indexing is much simpler than using loops: idx = A<1 & A>0; A(idx) = B(idx); A(A<C) = NaN; idy = B>100 | B<0; ...
11 giorni ago | 0
| accepted
How to conditionally merge rows in a table
lat = [45.67, 45.67, 56.89, 78.61]'; lon = [-66.45, -66.45, -65, -67]'; id = [202, 202, 201, 200]'; key = {'A', 'B', 'C', 'C'...
12 giorni ago | 0
| accepted
Increment components of vector till a desired limit
for k = 6:100 % or 105 maybe... you can check this. v = reshape(hankel(1:5,5:k),1,[]) end
12 giorni ago | 2
Expected one output from a curly brace or dot indexing expression but there were 2 results
For your code to work the index tn4 must be scalar, but the error message tells us that it is not. Compare: S(1).blah = 1:3; ...
12 giorni ago | 0
| accepted
behaviour of nargout for anonymous functions
You get two different answers because you are testing two different functions: the function handle to addOne an anonymous func...
12 giorni ago | 0
| accepted
Combining cell arrays with empty doubles
% slightly more complex example data: a = {[],1;[],[]}; b = {[],[];2,[]}; c = {[],[];[],NaN}; % tmp = cat(3,a,b,c); [~,idp...
12 giorni ago | 2
| accepted
How to properly extract dataset and load in new file? Keep getting error.
There is no data field because you saved the array using the name Xs. So you need to use the field Xs (and get rid of the superf...
12 giorni ago | 0
| accepted
How do I insert data into new format based on row positions?
data = [8; 7; 1; 5]; datarowpositions = [0; 0; 0; 4; 0; 1; 0; 2; 0; 0; 3; 0]; desired = datarowpositions; desired(datarowposi...
13 giorni ago | 0
| accepted
naming using a string function
The MATLAB approach: N = numel(files); C = cell(1,N); for k = 1:N F = fullfile(files(k).folder,files(k).name); C{k}...
13 giorni ago | 0
how to iterate?
I don't see why any iterations are required, vectorized code will do this quite easily: A = [-120449852, -107496428]; B = [-10...
13 giorni ago | 0
| accepted
Repeat a string with a delimiter
A = 'abc'; B = join(repmat({A},1,3),', '); B = B{1} C = join(repmat(string(A),1,3),', ') % string output! D = sprintf('%1$s,...
13 giorni ago | 0
Remove parenthesis and the contents inside from a string
A = 'abc (ABC)'; B = regexp(A,'^\w+','once','match')
13 giorni ago | 0
| accepted
Programmatically change function input
Using a character vector is entirely the wrong approach. The correct approach is to use a comma-separated list: tt = synchroniz...
14 giorni ago | 0
| accepted
how can I display 3 row vectors as column vectors in front of eachother using fprintf?
a = [1,2,3]; b = [11,22,33]; c = [111,222,333]; fprintf('%d %d %d\n',[a;b;c])
14 giorni ago | 0
| accepted
Find rows in cell for each array between two values and create new cell with the values you just found
Using linear indexing to access the cell arrays only requires one loop: n_new = cell(size(n)); for k = 1:numel(n) idx = f...
15 giorni ago | 0
| accepted
How to multiply matrices using for loop?
z = 1; for k = 1:100 y = x.out(:,:,k); w = diag(fastexp(x.db(k))); z = z * y * w * y'; end
15 giorni ago | 0
| accepted
Create a new array by summing the columns of old array
The MATLAB approach, where M is your matrix: new = M(:,1:2:end) + M(:,2:2:end);
15 giorni ago | 0
| accepted
Reorder Matrix Rows from the row with the most nonzero elements to the row with the least nonzero elements
A = [... 0 1 2 4 7 12 17 22 27 33 42 0 0 1 3 6 11 16 21 26 34 43 0 1 2 4 7 12 17 22 28 35 44 0 0 1 2 8 13 18 23 29 36 45...
15 giorni ago | 0
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