Setting Negatives to Zero

*To*: mathgroup at smc.vnet.net*Subject*: [mg82736] Setting Negatives to Zero*From*: "Kevin J. McCann" <Kevin.McCann at umbc.edu>*Date*: Tue, 30 Oct 2007 03:26:37 -0500 (EST)*Organization*: University System of Maryland

I have a very large data set (64000 x 583) in which negative values indicate "no data", unfortunately these negatives are not all the same. I would like to efficiently set all these negatives to zero. I know that I will likely be embarrassed when I see how to do it, but I can't seem to remember or figure it out. I should emphasize that because of the size of the data set, this needs to be done efficiently. Another programming language does it as follows: x(x < 0) = 0; Thanks, Kevin -- Kevin J. McCann Research Associate Professor JCET/Physics Physics Building University of Maryland, Baltimore County 1000 Hilltop Circle Baltimore, MD 21250

**Follow-Ups**:**Re: Setting Negatives to Zero***From:*János <janos.lobb@yale.edu>

**Re: Setting Negatives to Zero***From:*Carl Woll <carlw@wolfram.com>