z transformation and inverse z transformation of elements in a matrix

Hi,

I have several large matrices that need to be, first, z-transformed element-by-element and then inverse z-transformed.

Since it seems that ztrans/iztrans only handle functions I tried using the equation: 0.5*log((1+m)./(1-m))

- where 'm' is a sample matrix.

However, now I have no idea how to inverse z-transform things.

Does anyone have any idea how to do this (i.e. know the formula to type in for an inverse z-transform)?

- or -

Does anyone know of formulas or functions that would ztransform and then inverse z-transform each element of a matrix?

These are correlation coefficient matrices of fMRI time series data, so the end goal is to average groups of matrices and then do a simple t-test between groups. However, I need to transform/revert the data prior to t-testing.

Thanks! Paul