# Rik

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**Content Feed**

Combination of distances between multiple points

You already have the generalized code. You just need to combine it with nchoosek: x=1+10*rand(1,6); y=1+10*rand(1,6); r=rand(...

18 hours ago | 0

Why do I get ans = logical 1 or 0 in the command window for the following script?

A comma does not mean and. In the Matlab syntax it is used to delimit two statements, so the second part of the line with your i...

19 hours ago | 1

| accepted

delete elements of a vector wich are not consecutive

You need some tricky indexing, but I believe this is what you need: v=1:(72*6); k=72; ind=(k:(2*k):(numel(v)-k)) + (1:k).'; ...

19 hours ago | 0

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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.

1 day ago | 0

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...

1 day ago | 0

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...

1 day ago | 1

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...

2 days ago | 0

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Error Unexpected MATLAB expression.

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

2 days ago | 0

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...

3 days ago | 0

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...

3 days ago | 0

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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)

3 days ago | 0

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...

4 days ago | 0

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;...

4 days ago | 0

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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...

4 days ago | 0

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...

4 days ago | 0

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...

5 days ago | 0

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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...

7 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')

7 days ago | 0

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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. ...

7 days ago | 0

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...

8 days ago | 0

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)

8 days ago | 0

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...

9 days ago | 1

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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...

9 days ago | 0

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 ...

10 days ago | 1

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...

10 days ago | 1

| accepted

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 ...

12 days ago | 0

adding two matrices of unequal length

Result=A+B(1+mod(1:size(A,1),end-1),:); (written on mobile, untested code)

12 days ago | 1

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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...

13 days ago | 1

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/...

14 days ago | 0

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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...

14 days ago | 0

| accepted