Community Profile

# 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.

All

#### Content Feed

View by

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...

etwa 2 Stunden ago | 1

| accepted

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

etwa 2 Stunden ago | 0

| accepted

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. ...

etwa 8 Stunden 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...

ein Tag 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)

ein Tag 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...

2 Tage ago | 1

| accepted

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...

2 Tage 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 ...

3 Tage 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...

3 Tage 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 ...

5 Tage ago | 0

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

5 Tage ago | 1

| accepted

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...

6 Tage ago | 1

Calculate mean from a cell array.

7 Tage ago | 0

| accepted

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...

7 Tage ago | 0

| accepted

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,...

8 Tage ago | 1

| accepted

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...

8 Tage ago | 0

| accepted

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...

9 Tage ago | 0

| accepted

cell cal from function problem
If you pre-allocate the cell array you can use a comma separated list: [input1, input2, input3, input4]=deal(rand); AA=cell(...

9 Tage ago | 0

| accepted

Getting around overuse of "if" statements.
You should use the value of DAY to set the value of a variable you can use as the range. You should also use strcmp to compare c...

10 Tage ago | 1

| accepted

How to calculate a median value of each interval?
%generate some random data temperature=15+10*rand(8767,1); phase=360*rand(size(temperature)); temperature_rounded=round(tem...

11 Tage ago | 0

| accepted

Submitted

JSON
Matlab/Octave JSON parser

Have you figured out an easy way to publish your MATLAB projects for public consumption?
(this is not a drop-in solution) You could bundle your m-file with a copy of GNU Octave. The main upside is that it will be fr...

15 Tage ago | 1

| accepted

How to plot the convolution of 2 functions
You didn't do the convolution on a function. However, since the vectors you did use are the y values of functions (with a shared...

16 Tage ago | 0

| accepted

I want to load a folder in appdesigner by using "button" and to load the path of the folder in the "EditField". How?
The uigetdir function only has 1 output. folder = uigetdir(); if isequal(folder,0) ...

16 Tage ago | 0

| accepted

extracting all lines includes specific string from text file

17 Tage ago | 1

| accepted

Subtracting Current and Previous Value of the same variable
No,that is not possible. What you can do is create a new variable which contains the previous value of a. Then you can trivially...

17 Tage ago | 0

Pause execution of While loop and resume from the same point with PushButtons App Designer
The reason for your issue is that you're using toc, which will still continue running. If you measure how long your GUI has bee...

17 Tage ago | 0

| accepted

I want to compare two arrays and check that which value is missing in second array as compared to first one?
You should avoid variable names like sum, as that will prevent you from using the sum function. Your question sounds like you n...

19 Tage ago | 0

| accepted

Modifying a Variable if a condition is met
Array operation in Matlab tend to be much faster than other solutions. This is a situation where you can use logical indexing: ...

22 Tage ago | 0

| accepted