Need to put in variables in 3d matrix

Hi

I have data of (x,y) coordinates in two column vectors and classifications in a third vector. I want have a matrix which ranges from the numbers in the x,y coordinates. I want to put in the classifications on the right coordinates creating a 3D matrix. Note I must have a 3d matrix and not a cell.

[Subhadeep Koley]

@Torbjörn Olsson what is the data type of your "classification vector" (i.e. the 3rd vector)?

Is it numerical / logical / string / categorical? You can verify this using the below command

class(classificationVector) % replace 'classificationVector' with the variable name of your 3rd vector