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 ...

4 years ago | 1

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

4 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}; % ...

4 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...

4 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(:),...

4 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,...

4 years ago | 1

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

4 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','...

4 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...

4 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...

4 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...

4 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...

4 years ago | 1

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Undefined variable in workspace problem
"where measurementValue is an n x 1 double array already loaded in my workspace." I guess you mean that it is loaded into the b...

4 years ago | 0

Answered
How to call a value from the command window to the editor window
Ugh, P-Files. You could try using EVALC: https://www.mathworks.com/help/matlab/ref/evalc.html and then parsing the string that...

4 years ago | 1

Answered
Getting error that output argument is not assigned during function when it is?
When direc is empty then ccmp is not defined (exactly as the error message states). This error is easy to demonstrate (showing ...

4 years ago | 0

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@ Symbol in function handles as an input variable to another function
"if i were to remove the @ sign it would tell me that i am missing input arguments..." Because in that case you are just callin...

4 years ago | 0

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Answered
strcmp function using wildcards
T = cell2table({'A','XXX';'B','G22';'C','G13';'D','G1234';'E','YYY';'F','G01'}) idx = ~cellfun(@isempty,regexp(T.Var2,'^G\d\d$'...

4 years ago | 1

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Answered
How to read hh:mm:ss.sss time format from a file that has time and other data
Because you did not upload a sample file I had to create my own (attached). T = readtable('test.txt') T.Var1

4 years ago | 0

Answered
Find the different elements in a cell array
Where out is your cell array: fnh = @(v) any(v(:)==1)&&any(v(:)==2); idx = cellfun(fnh,out)

4 years ago | 0

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Answered
I want to arrange a 1st column of a matrix in descending order an the elements in the row is going to arrange itself according to change of the row of first vector
The simple MATLAB approach: A = [3,2;1,4;2,6] B = sortrows(A,-1)

4 years ago | 0

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Answered
includeSubFolders name value pair argument
imageDatastore(imdir, "IncludeSubfolders",true, "LabelSource","foldernames"); % ^^^^ yo...

4 years ago | 0

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Answered
when using intersect function i need all rows of B and matching rows of A. how can i do it?
T1 = array2table([2451,10;2554,5;5419,2],'VariableNames',{'A','id'}) T2 = array2table([2451,15;2554,7;5419,5;8542,9],'VariableN...

4 years ago | 0

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Answered
Subtracting in a structure
You can do all of them at once using some comma-separated lists: S(1).F = 6; S(2).F = 10; S(3).F = 12; S(4).F = 16; S(5).F ...

4 years ago | 0

Answered
Index table with cell array
Where T is your table and C is your cell array: idx = ismember(T.NameOfVariable, C) out = T(idx,:)

4 years ago | 0

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Answered
Paste array a into array c based on the locations in array b
This is robust also when there is no overlap: a = [1,2,3,4,5,6]; b = [1,5,8,14,19,23]; d = diff(b); d(end) = d(end)+1; % inc...

4 years ago | 0

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Answered
How to exclude specific results from dir
C = {'A1b1';'A1b2';'A1b1_test'}; cellfun(@mkdir,C) S = dir('./*'); S.name S(ismember({S.name},{'.','..'})) = []; S(endsWith...

4 years ago | 0

Answered
I am getting a Error using alpha (line 68) Wrong number of arguments and was wondering if anyone could help me out because i am not sure what its saying.
% alpha in degree <<<<<< This needs to be a comment, not code. range=0:15:360; Y=sind(range); Table=[range;Y]'; disp('HW #6 ...

4 years ago | 0

Answered
How to get an specific element from an output vector of a function handle?
You could define a simple wrapper function, e.g.: f = @(x) [x+1; x^2; 2*x]; g = @(a,x)a(x); g(f(1),2)

4 years ago | 2

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Answered
Error using datenum (line 201) DATENUM failed.
Do not use outdated, discouraged, deprecated DATENUM (or for that matter DATEVEC or DATESTR). Import your data using READTABLE,...

4 years ago | 1

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Trying to write a function using @
g = @(x) sin(x)/x; % ^ ^ you forgot these g(1) g(pi) See: https://www.mathworks.com/help/matlab/matlab_prog/anonymous-fun...

4 years ago | 2

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