Rik

Last seen: Today | Active since 2017

E-mails with feedback/questions about FEX submissions are welcomed. In general I will post e-mails about Answers on the related page, unless there is good cause not to do so.

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Displaying multiple lines in MATLAB GUIDE text edit box
You need to make sure the max property is set to a large enough value, and that the uicontrol type supports multiple lines.

4 hours ago | 0

Answered
Return non-rounded value when assigning variable to index of array
You're confusing the data itself with how it is displayed. It is probably a double, meaning the value you attempted to assign wa...

4 hours ago | 0

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Filtering a table with datatime on dates
There is probably a native way to do this, but you could also do it yourself: ref=datetime(2019,10,1); L=day(ref)==day(tmp.Var...

9 hours ago | 0

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Computational capability difference between Student and Academic Versions
The functions are the same, only the license is different. There is a difference in which exact toolboxes are available for eac...

12 hours ago | 0

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Answered
Error Unexpected MATLAB expression.
You were missing an equal sign: c1(isinf(c1))=0; c1(isnan(c1))=0; % ^ % this one...

15 hours ago | 0

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How to create new ppt by using Matlab Script ?
If you want to avoid the use of a COM object (and are ok with moving to pptx): There is a submission on the file exchange calle...

1 day ago | 0

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How to multiply function handles stored in a cell array?
Na=repmat({@(w) [1,-w*i(2,e);0 1]},1,3) sa=@(w) 1; for n=1:numel(Na) sa=@(w) sa(w)*Na{n}(w); end Note that in this case...

1 day ago | 0

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Answered
To find Maximum value and minimum value for each group of four rows for a 180*1 matrix
Easy if you reshape the vector to an array: data=rand(180,1); data_=reshape(data,12,[]); max(data_,[],1) min(data_,[],1)

1 day ago | 0

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Splitapply command and merge results
The question for you is what you mean by merging, but steps 1 to 4 are below. %generate example data B=10*rand(1,100); edge...

2 days ago | 0

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Two conditional operations can be used in matlab or do I need to use double if?
It looks like you could use a lookup table and skip the entire loop: transversal=[0 1 0 1];longitudinal=[0 0 1 1]; LUT=[2 3;...

3 days ago | 0

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Answered
make an interactive graphic?
You can use the ButtonDownFcn property to trigger a function when the user clicks on an axes object. You can use the CurrentPoi...

3 days ago | 0

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How to use fminsearch for least square error minimization?
I mean your objective function must only return 1 value, regardless of the shape of your data. This is the standard ordinary le...

3 days ago | 0

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how to pass a function with internally set parameters as an input to another function
You need to pass a function handle. Probably the line below will do the trick. fscoeff(@ft1) The way you wrote it, you a...

3 days ago | 0

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Answered
Averaging scattered data over an n by n grid
Here is a full solution, using histcounts2 and accumarray to do the heavy lifting. This solution plots in 3D, so you can verify...

5 days ago | 1

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Greek letters Latex interpreter
You need to turn math mode on: plot(rand(10,2)); ylabel('Shear stress $\tau$ [MPa]', 'fontsize', 11, 'interpreter', 'latex')

5 days ago | 0

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Answered
What are these commands in Matlab? Can any one explain them with examples. I searched them but didn't find any help
The first line is accessing a field iqDAC of the struct metadata, which it transposes. The second line divides two variables. ...

6 days ago | 0

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Fill a matrix with matrix powers
n=3; A=rand(n,n); Zero=zeros(size(A)); C=repmat({Zero},n,n); C(logical(eye(n)))=arrayfun(@(n)A^n,1:n,'uni',false); C=cell2m...

7 days ago | 0

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How to solve the erro about fzero function?
Your custom function should return a scalar value, but it doesn't: fun = @fun_ball; Trq0 = 10; fun(Trq0)

7 days ago | 0

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How do I sort automatic variables in matlab?
You shouldn't generate variable names dynamically. You should use an array instead. That way you can use all the normal Matlab t...

8 days ago | 1

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Answered
Poor display of DICOM images using MATLAB (dicomread)
dicomread does not change the file in any way. Most medical viewers will use a subsampling. The viewer I use, uses an 8x8 biline...

8 days ago | 0

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need help making a 'for' loop to make a new matrix
Having numbered variables is a problem that should be solved when you create those variables. If you have 40 variables with the ...

9 days ago | 1

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simple combinations between cells
It can probably be done without a loop, but why do you want that? Loops are very efficient (as long as there isn't a builtin vec...

9 days ago | 1

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Answered
How do I find the maximum and minimum of a function in a given domain?
You need a function like fminbnd: y =@(x) (1*x.^4)/4+(4*x.^3)/3- 5*(x.^2)/2; x_min = fminbnd(y,-3,3) Let's confirm this with ...

10 days ago | 0

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adding two matrices of unequal length
Result=A+B(1+mod(1:size(A,1),end-1),:); (written on mobile, untested code)

11 days ago | 1

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Answered
extracting the last three characters from cell array
You probably want to extract the extension, instead of hard-coding the last three characters: data={'COD0MGXFIN_20210870000_01D...

12 days ago | 1

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Calculate mean from a cell array.
Two options of what you could mean: %load your data first websave('data.mat','https://www.mathworks.com/matlabcentral/answers/...

12 days ago | 0

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Answered
Assign values in the cell
You mean like this? output1={[1 2;3 4],[]}; L=cellfun(@isempty,output1); output1(L)={zeros(8,1)}; output1 Note that cellfun...

13 days ago | 0

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Answered
Right way to insert files paths into code
Personally I use a function like the one below to semi-hard-code the paths. The context for this is that I have a synced folder,...

13 days ago | 1

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Answered
How can add stop button and command in GUI
The general solution is to have the stop button set a flag (either in the guidata or in the UserData property of an object). %i...

14 days ago | 0

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Answered
string data type is not a class?
help methods This suggests that you can't use the methods(object) syntax for char and string inputs. methods('1') methods(cla...

15 days ago | 0

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