Search data clusters and saving them.

Hello there, i have a problem with writing a script.

The goal of the specific part of script that troubles me is to find values in a certain range inside a matix (so far so easy) and to save them in a new matrix. I calculated angels between 2 vectors: the script calculates the angel between V1 & V1 then V1&V2 then V1&V3... so on , in the next step V2&V2 ... so every vektor with every following, I saved all that data in a Matrix so 1st row is V1& every following, 2. row V2& every following.

Now i want to find clusters. Lets say every value above 0 and not more then equal to 10 is part of a cluster. I want the script not ony going trough every row, i want it to check if the rows are intertwined with each other so if there is a value at the point (1,2) that is 6 i want to save every value of the second row that meets the conditions in the same matrix as the values of the first row.

My Attemt looks like this:

[irow,icol,ind] = find(anr>0 & anr<=10);

irc = [irow,icol];

for i = 1: length(ind)

for is = 2: length(ind);

k(i) = find(irow(i) == irow(is));

[cro(i)] = icol(is) == irow(i);

end

end

As you can imagin it is not working , i am glad for every Tip and help i can get (i am very stuck with this). If there is a better way to do this i will gladly listen.

Kind Regards Jonas

Answer 1

[Mahesh Taparia]

Hi,

You can directly do by the following lines of code:

X=(anr>0 & anr<=10); 
Y=anr.*X; 

Y will contain the required data.

[Jonas Jeskulke]

Hey,

sry but that is not the problematic part. I got an answer though. Thank you for your efford.

The solving answer can be found here:

https://de.mathworks.com/matlabcentral/answers/499241-unable-to-perform-assignment-because-the-left-and-right-sides-have-a-different-number-of-elements