A little help with sort
- To: mathgroup at smc.vnet.net
- Subject: [mg112494] A little help with sort
- From: "Blackwell, Keith" <Keith.Blackwell at rbccm.com>
- Date: Fri, 17 Sep 2010 06:42:23 -0400 (EDT)
The problem I am having:
Let's say I have a 200 x 200 matrix.
I want to sort it in order of the values in column one.
Then I want it to sort all the doubles by the values in column two.
Then I want it to sort all the double doubles by reverse of the values
of column 4 or whatever.
Is there an easy way to do this. I know I can write something long and
annoying to do it, but I'm getting to the point in my use of mathematica
where I want to write more concise code.
Sort[Matrix, #1[]>#2[]&] seems to totally negate any pre
sorting... I tried to fold it backwards starting from column 4 and it
seems that sort just ignores whatever I do then.
Thanks in advance,
This E-Mail (including any attachments) may contain privileged or confident=
ial information. It is intended only for the addressee(s) indicated above.
The sender does not waive any of its rights, privileges or other protection=
s respecting this information.
Any distribution, copying or other use of this E-Mail or the information it=
contains, by other than an intended recipient, is not sanctioned and is pr=
If you received this E-Mail in error, please delete it and advise the sende=
r (by return E-Mail or otherwise) immediately.
This E-Mail (including any attachments) has been scanned for viruses.
It is believed to be free of any virus or other defect that might affect an=
y computer system into which it is received and opened.
However, it is the responsibility of the recipient to ensure that it is vir=
The sender accepts no responsibility for any loss or damage arising in any =
way from its use.
E-Mail received by or sent from RBC Capital Markets is subject to review by=
Such communications are retained and may be produced to regulatory authorit=
ies or others with legal rights to the information.
IRS CIRCULAR 230 NOTICE: TO COMPLY WITH U.S. TREASURY REGULATIONS, WE ADVI=
SE YOU THAT ANY U.S. FEDERAL TAX ADVICE INCLUDED IN THIS COMMUNICATION IS N=
OT INTENDED OR WRITTEN TO BE USED, AND CANNOT BE USED, TO AVOID ANY U.S. FE=
DERAL TAX PENALTIES OR TO PROMOTE, MARKET, OR RECOMMEND TO ANOTHER PARTY AN=
Y TRANSACTION OR MATTER.
Prev by Date:
Re: Inconsistent behaviour of Integrate
Next by Date:
Re: Advice on Compile
Previous by thread:
Re: Map Correlation across sublists of matrices
Next by thread:
Re: A little help with sort