Wrote

Spotted matrix definition bug if using Clear():

I suppose it should go to the corresponding extension topic (Custom Functions by Davide).

Quote

Also nested definition is not supported? In a form of

el(el(M,1,1),1,1):5

Somewhat related: http://en.smath.info/forum/yaf_postst7479_Nested-el---gives--Syntax-is-incorrect.aspx