Re: [R] xyplot and for loops
Thanks to Andy and Bert for setting me straight! Explicitly printing the xyplot
command takes care of the issue. Just didn't dig quite far enough into the
documentation.
cheers, Dave
[EMAIL PROTECTED] wrote:
Dave,
I think inside the loop you have to explicitly "print" a trellis object,
i.e. say
print(yplot(tmp.df$y.tmp ~ tmp.df[,i]))
If you read the help page for xyplot, look under "Value".
Hope this helps,
Andy
__
Andy Jaworski
518-1-01
Process Laboratory
3M Corporate Research Laboratory
-
E-mail: [EMAIL PROTECTED]
Tel: (651) 733-6092
Fax: (651) 736-3122
Dave Atkins
<[EMAIL PROTECTED]
gton.edu> To
Sent by: [EMAIL PROTECTED]
[EMAIL PROTECTED] cc
at.math.ethz.ch
Subject
[R] xyplot and for loops
05/04/2004 05:40
PM
I'm attempting to use xyplot() within a for() loop to plot the relationship
between a DV and a series of predictor variables, split by 2 conditioning
variables. However, xyplot() does not "seem" to be recognized within the
for()
loop; I don't receive any error message, but nothing is plotted and a
plotting
device is not opened. When I use the generic function plot(), everything
works
as expected. I'm using R v1.9.0 and lattice v0.9-11.
Here's a trivial example:
### create single outcome and two predictors
> y.tmp <- rnorm(20) ; x1.tmp <- rnorm(20) ; x2.tmp <- rnorm(20)
### combine into data.frame
> tmp.df <- data.frame(y.tmp, x1.tmp, x2.tmp)
> tmp.df
y.tmp x1.tmp x2.tmp
1 1.5022759 -0.150326662 -1.36627981
[snip]
20 1.2667825 -0.070356651 -0.38433160
### simple loop calling the columns of tmp.df to specify x variables
> for (i in 2:3){
+ plot(tmp.df$y.tmp ~ tmp.df[,i])
+ }
### works fine for plot()
### try the same with xyplot()
> for (i in 2:3){
+ xyplot(tmp.df$y.tmp ~ tmp.df[,i])
+ }
### nothing happens; no error msg; no plotting device opened
> xyplot(tmp.df$y.tmp ~ tmp.df[,2])
### without loop works fine and plots relationship of x1.tmp and y.tmp
Can someone see what I'm missing? Any directions/pointers appreciated.
cheers, Dave
[EMAIL PROTECTED]
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Re: [R] xyplot and for loops
Dave,
I think inside the loop you have to explicitly "print" a trellis object,
i.e. say
print(yplot(tmp.df$y.tmp ~ tmp.df[,i]))
If you read the help page for xyplot, look under "Value".
Hope this helps,
Andy
__
Andy Jaworski
518-1-01
Process Laboratory
3M Corporate Research Laboratory
-
E-mail: [EMAIL PROTECTED]
Tel: (651) 733-6092
Fax: (651) 736-3122
Dave Atkins
<[EMAIL PROTECTED]
gton.edu> To
Sent by: [EMAIL PROTECTED]
[EMAIL PROTECTED] cc
at.math.ethz.ch
Subject
[R] xyplot and for loops
05/04/2004 05:40
PM
I'm attempting to use xyplot() within a for() loop to plot the relationship
between a DV and a series of predictor variables, split by 2 conditioning
variables. However, xyplot() does not "seem" to be recognized within the
for()
loop; I don't receive any error message, but nothing is plotted and a
plotting
device is not opened. When I use the generic function plot(), everything
works
as expected. I'm using R v1.9.0 and lattice v0.9-11.
Here's a trivial example:
### create single outcome and two predictors
> y.tmp <- rnorm(20) ; x1.tmp <- rnorm(20) ; x2.tmp <- rnorm(20)
### combine into data.frame
> tmp.df <- data.frame(y.tmp, x1.tmp, x2.tmp)
> tmp.df
y.tmp x1.tmp x2.tmp
1 1.5022759 -0.150326662 -1.36627981
[snip]
20 1.2667825 -0.070356651 -0.38433160
### simple loop calling the columns of tmp.df to specify x variables
> for (i in 2:3){
+ plot(tmp.df$y.tmp ~ tmp.df[,i])
+ }
### works fine for plot()
### try the same with xyplot()
> for (i in 2:3){
+ xyplot(tmp.df$y.tmp ~ tmp.df[,i])
+ }
### nothing happens; no error msg; no plotting device opened
> xyplot(tmp.df$y.tmp ~ tmp.df[,2])
### without loop works fine and plots relationship of x1.tmp and y.tmp
Can someone see what I'm missing? Any directions/pointers appreciated.
cheers, Dave
[EMAIL PROTECTED]
__
[EMAIL PROTECTED] mailing list
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[R] xyplot and for loops
I'm attempting to use xyplot() within a for() loop to plot the relationship
between a DV and a series of predictor variables, split by 2 conditioning
variables. However, xyplot() does not "seem" to be recognized within the for()
loop; I don't receive any error message, but nothing is plotted and a plotting
device is not opened. When I use the generic function plot(), everything works
as expected. I'm using R v1.9.0 and lattice v0.9-11.
Here's a trivial example:
### create single outcome and two predictors
> y.tmp <- rnorm(20) ; x1.tmp <- rnorm(20) ; x2.tmp <- rnorm(20)
### combine into data.frame
> tmp.df <- data.frame(y.tmp, x1.tmp, x2.tmp)
> tmp.df
y.tmp x1.tmp x2.tmp
1 1.5022759 -0.150326662 -1.36627981
[snip]
20 1.2667825 -0.070356651 -0.38433160
### simple loop calling the columns of tmp.df to specify x variables
> for (i in 2:3){
+ plot(tmp.df$y.tmp ~ tmp.df[,i])
+ }
### works fine for plot()
### try the same with xyplot()
> for (i in 2:3){
+ xyplot(tmp.df$y.tmp ~ tmp.df[,i])
+ }
### nothing happens; no error msg; no plotting device opened
> xyplot(tmp.df$y.tmp ~ tmp.df[,2])
### without loop works fine and plots relationship of x1.tmp and y.tmp
Can someone see what I'm missing? Any directions/pointers appreciated.
cheers, Dave
[EMAIL PROTECTED]
__
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