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Stephen Cobeldick


5 788 total contributions since 2014

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Answered
how to call different functions of a matlab file to another matlab file
Local functions are only visible to other functions within the same M-file: https://www.mathworks.com/help/matlab/matlab_prog/l...

1 jour ago | 0

Answered
saving for loop results not working
"Can anyone please explain to me what im doing wrong and how to fix it." Your first code does not store/allocate/sum the output...

1 jour ago | 0

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lsqcurvefit Error using /
Replacing both of the mrdivide operators with rdivide operators gets rid of the error: >> fun = @(x,xd) (x(1)*(1+(sqrt(1+xd./x(...

1 jour ago | 0

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Answered
Find mean of rows containing decimal numbers in between integers in a column
>> Y = [1,0.098,0.00076,0.01,2,0.099,0.007,2,0.003,0.04,0.1,4]; >> X = cumsum([1;diff(~mod(Y(:),1))]~=0); >> Z = accumarray(X(...

1 jour ago | 4

Answered
How to set constraints of griddata results are all non-negative?
"Is there any way to control the range of interpolation results?" You could simply adjust the output data yourself: A = max(0,...

1 jour ago | 0

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Answered
fopen does not work when put text code
You are adding extra single quotes, here: lgttext = (".lgt'"); % ^ superfluous Roriginaltitle = insertBefore(sp...

2 jours ago | 3

Answered
How do I change a function name within a loop using variables?
You can store function handles in a cell array and use indexing: >> C = {@(x)2*x+3,@(x)sqrt(x)+1}; % {1st fun,2nd fun} >> C{1}...

2 jours ago | 2

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Answered
How to split an array by same length and make a matrix?
>> a = 1:72; >> b = reshape(a,24,[]).' b = 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ...

2 jours ago | 1

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Answered
Having trouble changing mouse cursor to "watch" to indicate that function is busy.
This worked for me: set(gcf, 'Pointer','watch') drawnow() % <- you need this ... set(gcf, 'pointer','arrow') Note that the ...

3 jours ago | 0

Answered
Interpolating linearly between many values in a vector
>> t_old = 1:10; % times 1:N >> rate = 1000; % 1 kHz >> t_new = linspace(t_old(1),t_old(end),(numel(t_old)-1)*rate+1);

3 jours ago | 0

Answered
How to check if one of output variables is not called
You can use nargout to detect how many output arguments are requested: if nargout>0 varargout{1} = x+y; end if nargout>1...

3 jours ago | 0

Answered
I have multiple equations that depend on a specific value and would like matlab to ask the user which equation to use and what the specific value is and then print that value but it's giving me trouble.
Your code is mixed up with the (meta-)data (i.e. the variable names named as material types), which is a very bad practice and s...

3 jours ago | 0

Answered
cprintf not work in linux command window
"open a command window in Linux system" cprintf works in the MATLAB Command Window: https://www.mathworks.com/help/matlab/ref/...

3 jours ago | 0

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Answered
Interrupting a Callback with a Push Button
" Is there another trick you recommend for this issue" The simplest solution is to use nested functions: simply define a logica...

3 jours ago | 0

Answered
Conversion to cell from double is not possible
A = cell2mat(dataC(:,1)); B = A * pi * 2; dataC(:,3) = num2cell(B); % <- you need NUM2CELL!

3 jours ago | 1

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Answered
remove row of matrix inside cell
You could use cellfun like this: >> F = @(m,x) m(setdiff(1:size(m,1),x),:); >> C = cellfun(F,A,B,'uni',0); >> C{:} ans = ...

3 jours ago | 0

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Answered
Writing table variables with quotations marks ("Placeholder variable name")
'QuoteStrings',true https://www.mathworks.com/help/matlab/ref/writetable.html#btyc9ne-1_sep_btyc9ne-1-QuoteStrings Otherwise i...

4 jours ago | 1

Answered
Taking out entries of a Vector to make a new Vector
Where V is your vector: X = V(4:4:end); Y = V; Y(4:4:end) = [];

8 jours ago | 0

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Answered
automatically filling a matrix
Method one: eye and kron: >> n = 5; >> j = 6; >> M = kron(-eye(j),ones(n,1)) M = -1 0 0 0 0 0 ...

10 jours ago | 0

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Answered
Looping within a structure
You can easily loop over the fieldnames: F = fieldnames(mystruct); for k = 1:numel(F) A = mystruct.(F{k}); ... do wh...

10 jours ago | 0

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Answered
How to convert a structure array into vector
S(1).F1 = [1,2,3,4,5]; S(2).F1 = [10,20]; S(1).F2 = [2,4,6,8,10]; S(2).F2 = [150,200]; F = fieldnames(S); C = num2cell(stru...

10 jours ago | 1

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Answered
Storing multiple matrices created by multiple executions of a function
Method one: input/output arguments: function [A,B] = mainfun(N) [A,B] = recfun(N,{},{}); end function [A,B] = recfun(N,A,B) ...

10 jours ago | 0

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Answered
How can I find consecutive digits seperated by spaces?
Simple solution using a dynamic match expression: >> str = '1 1 1 4 4 6 7 7 7 7'; >> out = regexprep(str,'(\d)(??( $1)*)','${n...

10 jours ago | 1

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Answered
Output from nested struct into numerical / string array
string({mystruct.somenesting.objecttype.name}) cat(1,mystruct.somenesting.somethingelse.size) % ^ change this to suit the si...

10 jours ago | 0

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Answered
convert a 10x2 matrix into x,y coordinates
>> M = [1,2;3,4;5,6] M = 1 2 3 4 5 6 >> V = 1:size(M,1); >> fprintf('(x%d,y%d)=(%d,%d)\n',[V;V;M.']) (x1,y1)=(1,...

12 jours ago | 0

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Answered
tic, toc, apear to be reporting incorrect times when called in App Designer button callback
Try specifying the output variable: t = tic(); ... toc(t) Or record the time yourself: tstart = now(); ... now()-tstart ...

18 jours ago | 1

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Answered
Convert single string with many numbers to vector
Very simple, very efficient, no evil eval: >> hue = '10 20 30 40 50'; >> vec = sscanf(hue,'%f',[1,Inf]) vec = 10 20 3...

18 jours ago | 0

Answered
Row interpolation by adding data at end of the matrix
>> V = interp1(1:18,d,1:20,'pchip','extrap'); >> V(:) ans = 24.1615256950601 24.1615256699363 24.1615256438020 ...

19 jours ago | 0

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Answered
assign header line value to variable
A very simple and very efficient method without eval and without shadowing the inbuilt size: >> str = 'size=256 256 256;'; >> ...

19 jours ago | 0

Answered
question about vectorization using indexes
Note that ind and b must be transposed for this to work: >> a = [4;2;1;3;1;4;4;0]; % must be column! >> ind = [1,0;2,3;4,0;3...

20 jours ago | 0

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