Try:
data <- expand.grid( a= seq(0,1,.1), b= seq(0,1,.1) )
Hope this helps,
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at intermountainmail.org
(801) 408-8111
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of esh
> Sent: Tuesday, August 07, 2007 1:59 PM
> To: r-help at stat.math.ethz.ch
> Subject: [R] How do I generate a grid of data in [0,1]?
>
> Hello, my objective is to produce a data.frame that
> represents a grid of data points evenly spaced as closely
> together as possible on a graph with domain and range both
> being [0,1]. I tried to get a smaller example working first
> and I tried the following code:
> > sink(file="Rsampledata")
> > a<-0
> > while(a<1) {data<-data.frame(a,seq(0,1,0.1)); print(data);
a<-a+0.1}
>
> My output was:
> a seq.0..1..0.1.
> 1 0 0.0
> 2 0 0.1
> 3 0 0.2
> 4 0 0.3
> 5 0 0.4
> 6 0 0.5
> 7 0 0.6
> 8 0 0.7
> 9 0 0.8
> 10 0 0.9
> 11 0 1.0
> a seq.0..1..0.1.
> 1 0.1 0.0
> 2 0.1 0.1
> 3 0.1 0.2
> 4 0.1 0.3
> 5 0.1 0.4
> 6 0.1 0.5
> 7 0.1 0.6
> 8 0.1 0.7
> 9 0.1 0.8
> 10 0.1 0.9
> 11 0.1 1.0
> a seq.0..1..0.1.
> 1 0.2 0.0
> 2 0.2 0.1
> 3 0.2 0.2
> 4 0.2 0.3
> 5 0.2 0.4
> 6 0.2 0.5
> 7 0.2 0.6
> 8 0.2 0.7
> 9 0.2 0.8
> 10 0.2 0.9
> 11 0.2 1.0
> a seq.0..1..0.1.
> 1 0.3 0.0
> 2 0.3 0.1
> 3 0.3 0.2
> 4 0.3 0.3
> 5 0.3 0.4
> 6 0.3 0.5
> 7 0.3 0.6
> 8 0.3 0.7
> 9 0.3 0.8
> 10 0.3 0.9
> 11 0.3 1.0
> a seq.0..1..0.1.
> 1 0.4 0.0
> 2 0.4 0.1
> 3 0.4 0.2
> 4 0.4 0.3
> 5 0.4 0.4
> 6 0.4 0.5
> 7 0.4 0.6
> 8 0.4 0.7
> 9 0.4 0.8
> 10 0.4 0.9
> 11 0.4 1.0
> a seq.0..1..0.1.
> 1 0.5 0.0
> 2 0.5 0.1
> 3 0.5 0.2
> 4 0.5 0.3
> 5 0.5 0.4
> 6 0.5 0.5
> 7 0.5 0.6
> 8 0.5 0.7
> 9 0.5 0.8
> 10 0.5 0.9
> 11 0.5 1.0
> a seq.0..1..0.1.
> 1 0.6 0.0
> 2 0.6 0.1
> 3 0.6 0.2
> 4 0.6 0.3
> 5 0.6 0.4
> 6 0.6 0.5
> 7 0.6 0.6
> 8 0.6 0.7
> 9 0.6 0.8
> 10 0.6 0.9
> 11 0.6 1.0
> a seq.0..1..0.1.
> 1 0.7 0.0
> 2 0.7 0.1
> 3 0.7 0.2
> 4 0.7 0.3
> 5 0.7 0.4
> 6 0.7 0.5
> 7 0.7 0.6
> 8 0.7 0.7
> 9 0.7 0.8
> 10 0.7 0.9
> 11 0.7 1.0
> a seq.0..1..0.1.
> 1 0.8 0.0
> 2 0.8 0.1
> 3 0.8 0.2
> 4 0.8 0.3
> 5 0.8 0.4
> 6 0.8 0.5
> 7 0.8 0.6
> 8 0.8 0.7
> 9 0.8 0.8
> 10 0.8 0.9
> 11 0.8 1.0
> a seq.0..1..0.1.
> 1 0.9 0.0
> 2 0.9 0.1
> 3 0.9 0.2
> 4 0.9 0.3
> 5 0.9 0.4
> 6 0.9 0.5
> 7 0.9 0.6
> 8 0.9 0.7
> 9 0.9 0.8
> 10 0.9 0.9
> 11 0.9 1.0
> a seq.0..1..0.1.
> 1 1 0.0
> 2 1 0.1
> 3 1 0.2
> 4 1 0.3
> 5 1 0.4
> 6 1 0.5
> 7 1 0.6
> 8 1 0.7
> 9 1 0.8
> 10 1 0.9
> 11 1 1.0
>
> This does produce the kind of data points that I will need,
> however I need all these data points in one single data.frame
> instead of 11 because of further formatting I must do with
> the data. Any suggestions?
> Thank you,
> Elysia
>
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