Re: Deleting entire row and/or column
- To: mathgroup at smc.vnet.net
- Subject: [mg98247] Re: Deleting entire row and/or column
- From: mike.honeychurch at gmail.com
- Date: Fri, 3 Apr 2009 04:38:58 -0500 (EST)
- References: <gr0ghk$950$1@smc.vnet.net>
On Apr 1, 2:50 pm, KFUPM <hussain.alqaht... at gmail.com> wrote: > Dear all > > I have large matrices having entire rows and/or columns of zeros and I > want to delete those zero rows and columns. My question, what is the > best (most compact) command to use in Mathematica. Please note that > the value of zero is the real zero i.e 0.0000 not just 0. > > Regards, yourMatrix /. x_ /;x == 0 -> Sequence[] or if that doesn't work then yourMatrix /. x : (_Real | _Integer) /; N[x] == 0. -> Sequence[] you could change this to Chop[x] is the values ->0 could be considered zero. Mike