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Stephen Cobeldick


5,793 total contributions since 2014

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Answered
convert string of numbers to double
More efficient than converting to symbolic and probably also str2num: >> S = '676, 933, 1645, 2069:.025:2069.5, 2327:.025:2327....

5 hours ago | 0

Answered
How to create new file in another folder?
" But I have create the new file in another folder . How can I do this?" All MATLAB functions that read/write to data files acc...

5 hours ago | 1

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Answered
how to load a variable in a loop
D = dir('CC*/Rest/ROI_epi.mat'); for k = 1:numel(D) F = fullfile(D(k).folder,D(k).name); S = load(F); ROI = S.RO...

9 hours ago | 0

Answered
Why use x=load('myFile.mat')?
From the discussion following this answer: "why should people never ever load mat files into the workspace?" Because load-ing ...

10 hours ago | 1

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Increasing number of points in a plot without ruining the shape
Try using method spline or pchip and see if they do what you want: interp1(...,'pchip') https://www.mathworks.com/help/matlab/...

11 hours ago | 0

Answered
Testing if an input is numeric or character
if isnan(Sbase_gerador) ... end

19 hours ago | 0

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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...

2 days ago | 0

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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...

2 days 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(...

2 days 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(...

2 days 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,...

2 days 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...

3 days 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}...

3 days 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 ...

3 days 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 ...

4 days ago | 0

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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);

4 days 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...

4 days ago | 0

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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...

4 days 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/...

4 days 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...

4 days 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!

4 days 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 = ...

4 days 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...

5 days 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) = [];

9 days 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 ...

11 days 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...

11 days 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...

11 days 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) ...

11 days 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...

11 days 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...

11 days ago | 0

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