Stephen Cobeldick

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6 841 total contributions since 2014

Suspensa Vix Via Fit

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Answered
Dot Product Doubt, don't get the result I expected.
You are using the wrong operator. You need basic matrix multiplication, not the dot product: >> q1 = [0;0;0.2]; >> q1.'*q1 an...

en dag ago | 2

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fprintf columns turning out weirdly
"Why would It print like this..." Because that is exactly what you told fprintf to do: your fprintf format string has six forma...

en dag ago | 0

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convert binary to hex
>> B = '111000111100110011111001000000111101000000000111111110001111001100111110010000001111010000000001111111100011110011001111...

en dag ago | 0

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Transposing 5x5x5 matrix
new = permute(r,[2,1,3])

5 dagar ago | 0

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how to clip column into vectors with the rules I set
>> [~,~,idx] = unique(floor(A(:,1)/10)); >> out = accumarray(idx,A(:,2),[],@(v){v}); >> out{1} ans = 0.3000 0.8000 ...

5 dagar ago | 2

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Floor function with a space giving an array output
Your example uses command syntax, which is explained here: https://www.mathworks.com/help/matlab/matlab_prog/command-vs-functio...

5 dagar ago | 0

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How to interpret entries in documentation's left pane
"What do the entries below that represent?" They list all other page headings that are at the same level in the current Content...

6 dagar ago | 1

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How to use regexp to extract data?
>> tdata = {'XX__TG';'GB_TH';'BN__TH'}; >> spl = regexp(tdata,'_+','split'); >> spl = vertcat(spl{:}); >> out1 = spl(:,1) ou...

6 dagar ago | 0

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Answered
Why am I warned about defining variables in a nested function, when I don't?
So far no one has actually explained the warning, which is a pity because this is really quite an interesting question. Some an...

6 dagar ago | 3

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How do I swap the elements in the major diagonal with those in the minor diagonal?
Similar to madhan ravi's answer, without sorting: >> x = [1,2,3,4,5;6,7,8,9,1;2,3,4,5,6;7,8,9,1,2] x = 1 2 3 4 5 ...

7 dagar ago | 2

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Removing the max and min of a vector without removing multiple minimums or maximums
[~,Sx] = min(a1); % Shortest Link [~,Lx] = max(a1); % Longest Link a2 = a1; a2([Sx,Lx]) = [] And tested using the values tha...

7 dagar ago | 1

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How to import data with exotic delimiters.
Using textscan's optional arguments properly avoids awkward reshaping of the output (and you have more flexibility because you c...

7 dagar ago | 0

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How to save multiple text files with same name, but with incrementing numbers
"The function I'm using, writetable, requires to specify the filename between apostrophes..." Actually the writetable documenta...

8 dagar ago | 0

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Automatically naming mat files with variable names
The cause of your difficulties lies in the unfortunate design decision to force meta-data into the variable names. Meta-data is ...

8 dagar ago | 1

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How can I merge rows into one with the same ID number?
Assuming that the non-diagonal values are exactly zero, then you could use varfun something like this: >> T = cell2table({'A',1...

8 dagar ago | 0

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Storing the generated matrices from a for loop into cell arrays and access them later to multiply them altogether
No cell array required: >> x = [2,5,23]; >> A = [9,8;7,6]; >> [n,n] = size(A); >> M = 1; >> for k=numel(x):-1:1; M = M*(A-x...

10 dagar ago | 0

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Example got removed from the mathworks website
Unfortunately the Wayback Machine did not seem to have a copy of it, but it was still available in Google Cache, so I saved you ...

11 dagar ago | 1

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Answered
Substitute string to double
>> A = {'0+1/R1','0-1/R1','1';'0-1/R1','0+1/R1+1/R2','0';'1','0','0'}; >> A = strrep(A,'R1','1000'); >> A = strrep(A,'R2','100...

11 dagar ago | 0

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Answered
i want to write a code where equation is y=x*x. if y=100 what is the value of x?
>> f = @(x) x.^2 - 100; >> x = fzero(f,pi) x = 10

11 dagar ago | 0

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Answered
delete column from matrix
Where M is your matrix: M = M(:,24:24:end)

12 dagar ago | 0

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How can I differentiate between powermod(a,b,c) and mod(a^b,c)
>> 104^45 ans = 5.8412e+90 is well above flintmax, so it is very unlikely to exactly represent the integer that you think ...

12 dagar ago | 0

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matrix creation from a loop
The simplest and most efficient solution is to just create one matrix: lat = zeros(6964,60) which you can then trivially acces...

12 dagar ago | 1

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How can I index a 3D array like A(n,m,:) and get the result as a 1D array?
B = reshape(A(2,3,:),1,[])

12 dagar ago | 0

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How to attribute a letter to unique combinaisons
There does not seem to be a convenient way to apply a function to table groups that does not also accumulate the results (e.g. l...

12 dagar ago | 0

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How can I pass a anonymous function as an output to another function?
"Looks likes I am not allowed to do that . I would like to know how this can be achieved" Your attempted code has several bugs ...

13 dagar ago | 0

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image a set of matrix variables after loading them in
Do not use load. Assign the imported data to an array, e.g.: theFiles(k).data = readmatrix(fullFileName); Now all of your impo...

13 dagar ago | 1

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Answered
adding and subtracting elements in the same row in an nested for loop
"My assumption is that I have to do this using a nested for loop." Using array operations would be a much better use of MATLAB,...

13 dagar ago | 0

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Answered
How can I sort a matrix to match another matrix?
>> [~,idx] = sort(B); >> [~,idx(idx)] = sort(A(:,2)); >> A = A(idx,:) A = 11 1 21 2 12 1 31 3 ...

13 dagar ago | 1

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Answered
Maximization of a Function
The syntax .. = -@(..) is not valid for multiple reasons: the output of @ is a function handle. Arithmetic operations are no...

13 dagar ago | 1

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How can I make multiple vectors the same length?
Because each of the input columns has their own domain, you will have to loop over the columns and interpolate each column separ...

13 dagar ago | 1

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