How can I (Read/Write) (from/to) element (i,j) according to your solution?
I gave no 'solution', I marely made a suggestion, in trying to understand the problem.
As Jpn hinted, what I suggested was a principal - which is why I asked what you need it for, since sometimes insted of string 'matrxes' string maps might be better, depending on needs.
If the principal of a 2D vector is good foryou , then making the wrapper class you got from qt-interest is trivial.
Oh, and reading/wiring to the bare QVector< QVector<QString> > is tright forword.
objs[i][j] = someString.
Resizing is offered by QVector. as you can see your self in the class you posted.