Hello, Is there a simple way/function to constrain the minimum and maximum value of an output from an assignment? if I have z <- x +y but I want z to always be between 1 and 5, such that z=5 if (x+y >= 5) and z=1 if (x+y <= 1). I know it sounds simple, I can do it with "if" statements but just wondered if there is a simpler way? Thanks a bunch, J ---------------------- Jim Maas University of East Anglia
constrain min and max of output
5 messages · Jim Maas, Timothy Bates, Eliano +2 more
this works x=1; y=-100; z = min(5, max(1, x+y)); z
On 25 Oct 2011, at 1:46 PM, Jim Maas wrote:
Hello, Is there a simple way/function to constrain the minimum and maximum value of an output from an assignment? if I have z <- x +y but I want z to always be between 1 and 5, such that z=5 if (x+y >= 5) and z=1 if (x+y <= 1). I know it sounds simple, I can do it with "if" statements but just wondered if there is a simpler way? Thanks a bunch, J ---------------------- Jim Maas University of East Anglia
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Hi There, I have a similar problem. I have a function that i want to maximize. lets say: (x-2)^2+(y-4)^2 and i want to constraint that maximization to x+y<=5 I can program that constraints in R. Do you have any suggestion? Regards -- View this message in context: http://r.789695.n4.nabble.com/constrain-min-and-max-of-output-tp3936635p3936688.html Sent from the R help mailing list archive at Nabble.com.
On 25/10/2011 9:03 AM, Timothy Bates wrote:
this works x=1; y=-100; z = min(5, max(1, x+y)); z
But it only works for scalar x and y. The vector version would use pmin() and pmax(). Duncan Murdoch
On 25 Oct 2011, at 1:46 PM, Jim Maas wrote:
Hello, Is there a simple way/function to constrain the minimum and maximum value of an output from an assignment? if I have z<- x +y but I want z to always be between 1 and 5, such that z=5 if (x+y>= 5) and z=1 if (x+y<= 1). I know it sounds simple, I can do it with "if" statements but just wondered if there is a simpler way? Thanks a bunch, J ---------------------- Jim Maas University of East Anglia
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
That is really quite clever! -----Original Message----- From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Timothy Bates Sent: Tuesday, October 25, 2011 6:03 AM To: Jim Maas Cc: r-help at r-project.org Subject: Re: [R] constrain min and max of output this works x=1; y=-100; z = min(5, max(1, x+y)); z
On 25 Oct 2011, at 1:46 PM, Jim Maas wrote:
Hello, Is there a simple way/function to constrain the minimum and maximum value of an output from an assignment? if I have z <- x +y but I want z to always be between 1 and 5, such that z=5 if (x+y >= 5) and z=1 if (x+y <= 1). I know it sounds simple, I can do it with "if" statements but just wondered if there is a simpler way? Thanks a bunch, J ---------------------- Jim Maas University of East Anglia
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.