I am sorry if my question is not smart enough. Via this post (Is there any standard notation for specifying dimension of a matrix after the matrix symbol?), I am still bit confused with matrix notation.
Would you show me how I could express the size of square matrix called J (n x n) with n dependent on cumulative weight fraction?
$\sum_{i=1}^n \omega_i = 1$
Thank you so much for your help.