Re: setting elements of an array based on a condition
- To: mathgroup at smc.vnet.net
- Subject: [mg87158] Re: setting elements of an array based on a condition
- From: Szabolcs Horvát <szhorvat at gmail.com>
- Date: Wed, 2 Apr 2008 05:57:49 -0500 (EST)
- Organization: University of Bergen
- References: <fsvejr$ssp$1@smc.vnet.net>
Claus wrote:
> Hello,
> I have one array, W, which for testing purposes has 25 rows and 50 columns.
> There are two more things I want to accomplish with this:
> 1) I want to set all elements of W which are smaller than zero to zero.
Clip[W, {0, Infinity}]
> 2) Then I want to calculate the sum of the elements in each column of W.
> How can I do this?
Plus @@@ W
or
Total /@ W