Part ([[...]]) and span (;;)
- To: mathgroup at smc.vnet.net
- Subject: [mg84599] Part ([[...]]) and span (;;)
- From: nigol <dario.buttari at gmail.com>
- Date: Sun, 6 Jan 2008 05:57:11 -0500 (EST)
In the Mathematica 6 help is written:
Common spans of parts include:
expr[[;;,j]] column j
If any of the Subscript[list, i] are All or ;;, all parts at that
level are kept.
On my platform the following works:
In[1]:= {{a, b, c}, {d, e, f}, {g, h, i}}[[All, 2]]
Out[1]= {b, e, h}
but the following does not work:
{{a, b, c}, {d, e, f}, {g, h, i}}[[;; , 2]]
Syntax::sntxf: ";;" cannot be followed by ",2".
Syntax::tsntxi: ",2" is incomplete; more input is needed.
Syntax::sntxi: Incomplete expression; more input is needed.
In[2]:= $Version
Out[2]= "6.0 for Microsoft Windows (32-bit) (June 19, 2007)"
Is this problem common to other platforms?
Thanks,
Dario