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Rik


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1,731 total contributions 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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Answered
where is the origin of the coordinate system when I use the stlread function to get the coordinates of an stl file?
In general an stl reader function will use the origin that is encoded in the file itself. If you open the file file with a plain...

1 day ago | 1

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Answered
Alternative for eval of dynamic variables
If you use a cell array you can store everything in a single array even if the size are different. Because you can index into th...

3 days ago | 1

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Answered
figure adding plot to named figures?
You can modify the NextPlot property of your axes objects. You can do this by modifying the property, or by using hold on. h=st...

4 days ago | 0

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Answered
How to pass the same function to different columns?
You need to specify the target axes, otherwise the function will use gca for each call, so that will be the same axes. figure(1...

4 days ago | 0

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Answered
Reading Workspace variable into csv file
The most important thing to do first is to reshape the data to a 2D array. Then we can use the writematrix function as normal. ...

5 days ago | 1

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Answered
How to concatenate different rows
You can't concatenate files. (Technically you can, but showing how you could do it will not be helpful for you) What you need t...

5 days ago | 1

Answered
I can't get to diplay values in a edit box. HELP!!!
It looks like you are trying to set a numeric value as the String property. You will first have to convert your symbolic values ...

5 days ago | 0

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Answered
Creating a Path to a sub folder
As mentioned in the documentation for uigetfile you can capture the path of the selected files as the second output.

5 days ago | 0

Answered
How to read .params file via matlab?
Reading text files to Matlab variables is one of the most commons tasks. One of the many, many functions is my readfile function...

5 days ago | 0

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Answered
Global variables when doing Matlab array job in a cluster
I don't have a direct link to the doc, but I'll take Walter's word for it: "The initial value of the global variables will not ...

6 days ago | 0

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Answered
Outputs for smoothdata function
As you can read in the documention for the smoothdata function the first output is the smoothed data. It will not actually produ...

6 days ago | 0

Answered
splitapply with own created function
You can probably get around this by wrapping your function in an anonymous function: fun=@(input1)maxperinterval(input1,s); ...

6 days ago | 0

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Answered
can a struct function access struct elements ?
When defining an anonymous function it will have access to all the variables in scope. It doesn't matter how you store that anon...

6 days ago | 0

Answered
How to simulate the outage probability of user data rate versus signal to noise ratio?
Since that apparently was the solution, I'll post it as an answer: SNR_vector_dB=-20:10:30; %the SNR vector R_th = 0.512; % ...

6 days ago | 0

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Answered
Pause until input from one of two buttons
You can also unpause uiwait with uiresume, not just by closing the figure.

7 days ago | 0

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Answered
2 popup menus connected
Ynumber=[1;1;2;3;5]; Version={'AP'; 'AP_R' ;'AP' ;'TI1' ;'TI2'}; mytable= table(Ynumber,Version); %Y_selected=get(handles.d...

7 days ago | 0

Answered
请问画三维曲面图时,如果自变量的区间边界是一个函数怎么办?
Use meshgrid or ndgrid to generate a full grid of coordinates. Then you mark all points outside your triangle with inpolygon. Th...

8 days ago | 0

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Answered
Conversion to char from logical is not possible.
You need to pass the option as a parameter to the integral function instead of defining it earlier. I= @(x)((x.^(3).*exp(-x...

9 days ago | 0

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Answered
How can I optimize the value of a matrix?
The code below will fit a value for B with the fminsearch function. Note that it is relatively sensitive to a good initial guess...

9 days ago | 0

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Answered
Index exceeds the number of array elements (1).
If you set a breakpoint just before that line you will notice the values of all your variables: s is a scalar and L has a value ...

9 days ago | 0

Answered
How to remove rows in a matrix based on the first column
I guess this is what you need: data=600000*rand(224836,3); L=data(:,1)<=300000 data(L,:)=[] ;

9 days ago | 0

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Answered
Hello guys, I need help.
The indices you get in your last operation can be converted to subscripts, which will correspond to your three inputs. ind=ind(...

11 days ago | 1

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Answered
Hi, there is a (1x6) vector that i want to extract values from. I used strings to pick-up the subtitle and now the problem is that i have to extract every value under the subtitle (e.g Oxygen). How to i extract those values without hardcoding ?
It would probably make a more sense to use the table data type instead of a string array that is parsed to separate variables. ...

11 days ago | 0

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Answered
Why my GUI keeps producing error when I run it?
You define T like this: Th_1=str2double(handles.Theta_1.String)*pi/180; Th_2=str2double(handles.Theta_2.String)*pi/180; Th_3=...

12 days ago | 0

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Answered
How to perform robust line fitting in a binary image
They key is in how you define what a good fit is. The code below uses the root-mean-square of the orthogonal distance between al...

13 days ago | 0

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Answered
How do I remove a set of repeated values in a x by 2 matrix?
I think the code below is what you need. There may be much more efficient methods, but this will do as long as this will not be ...

13 days ago | 0

Answered
find the next row of an element in a matrix
This probably isn't the fastest solution, but it does get the output you describe. The last loop I had to guess, so let me know ...

13 days ago | 1

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Answered
ButtonDownFcn disabled after using matlab rotate 3D tool
As you can read in the <https://www.mathworks.com/help/matlab/ref/rotate3d.html doc>, using the rotate3d function without any in...

13 days ago | 0

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Answered
Gray value for each point plot over image
Since the Punkte array contains coordinates, you can convert them to indices. You need a way to translate the x and y positions ...

13 days ago | 1

Answered
Matlab function for cumulative power
This code does what you ask without loops. %define inputs r=9; n=4; [a,b]=meshgrid(0:n); exponents=a-b; exponents(expone...

14 days ago | 1

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