P norm is applicable for Array 3D, Vector and Matrix variables. The p-norm is used as pnorm_p where, p represents the value to be used as p in the p-norm equation given below. p should be greater than or equal to 1.0.
For Array 3D and Vector:
$$ ||\underline{V}||_{p} = \left(\sum_{i=0}^{n-1}|v_{i}|^p \right )^{1/p}$$
For Matrix:
$$ ||\underline{A}||_{p} = \left(\sum_{i=0}^{n-1}\sum_{j=0}^{n-1}|a_{ij}|^p \right )^{1/p}$$