Re: [R] lattice: how to center a subtitle?
On Tue, Apr 5, 2011 at 6:12 AM, David Scott d.sc...@auckland.ac.nz wrote: [...] I am not sure where I read it and I can't find it again, but my understanding is that expressions using bquote with lattice need to be enclosed in as.expression() to work. That is in contrast to what happens in base graphics. Here is a simple example. a - 2 plot(1:10, a*(1:10), main = bquote(alpha == .(a))) require(lattice) xyplot(a*(1:10)~ 1:10, main = bquote(alpha == .(a))) xyplot(a*(1:10)~ 1:10, main = as.expression(bquote(alpha == .(a Which produces: a - 2 plot(1:10, a*(1:10), main = bquote(alpha == .(a))) require(lattice) Loading required package: lattice xyplot(a*(1:10)~ 1:10, main = bquote(alpha == .(a))) Error in trellis.skeleton(formula = a * (1:10) ~ 1:10, cond = list(c(1L, : object 'alpha' not found xyplot(a*(1:10)~ 1:10, main = as.expression(bquote(alpha == .(a Using expression() rather than as.expression() doesn't produce the desired affect. Try it yourself. As to why this is the case . Let's see: ?xyplot says 'main': Typically a character string or expression describing the main title to be placed on top of each page. [...] So, lattice is fairly explicit, by R standards, in requiring 'main' to be character or expression. On the other hand, ?title says The labels passed to 'title' can be character strings or language objects (names, calls or expressions), or [...] so it additionally accepts names and calls. Now, we have a - 2 foo - bquote(alpha == .(a)) foo # Looks OK alpha == 2 mode(foo) # But [1] call is.expression(foo) # not an expression [1] FALSE is.expression(expression(foo)) ## YES, but [1] TRUE expression(foo) ## not what we want expression(foo) is.expression(as.expression(foo)) [1] TRUE as.expression(foo) ## This IS what we want expression(alpha == 2) So I submit that lattice is behaving exactly as suggested by its documentation. Now you would naturally argue that this is hiding behind technicalities, and if call objects work for plot(), it should work for lattice as well. But watch this: plot(1:10, main = foo) # works perfectly arglist - list(1:10, main = foo) arglist # Looks like what we want [[1]] [1] 1 2 3 4 5 6 7 8 9 10 $main alpha == 2 do.call(plot, arglist) Error in as.graphicsAnnot(main) : object 'alpha' not found ...which I would say is unexpected behaviour, if not a bug. The moral of the story is that unevaluated calls are dangerous objects (try this one out for fun: foo - bquote(q(.(x)), list(x = no)) do.call(plot, list(1:10, main = foo)) ), and carrying them around is not a good idea. Lattice does use the do.call paradigm quite a bit, and I think it might be quite difficult to fix it up to handle non-expression language objects (which will still not fix the type of problem shown above). -Deepayan __ R-help@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.
Re: [R] lattice: how to center a subtitle?
On 6/04/2011 12:47 a.m., Deepayan Sarkar wrote: On Tue, Apr 5, 2011 at 6:12 AM, David Scottd.sc...@auckland.ac.nz wrote: [...] I am not sure where I read it and I can't find it again, but my understanding is that expressions using bquote with lattice need to be enclosed in as.expression() to work. That is in contrast to what happens in base graphics. Here is a simple example. a- 2 plot(1:10, a*(1:10), main = bquote(alpha == .(a))) require(lattice) xyplot(a*(1:10)~ 1:10, main = bquote(alpha == .(a))) xyplot(a*(1:10)~ 1:10, main = as.expression(bquote(alpha == .(a Which produces: a- 2 plot(1:10, a*(1:10), main = bquote(alpha == .(a))) require(lattice) Loading required package: lattice xyplot(a*(1:10)~ 1:10, main = bquote(alpha == .(a))) Error in trellis.skeleton(formula = a * (1:10) ~ 1:10, cond = list(c(1L, : object 'alpha' not found xyplot(a*(1:10)~ 1:10, main = as.expression(bquote(alpha == .(a Using expression() rather than as.expression() doesn't produce the desired affect. Try it yourself. As to why this is the case . Let's see: ?xyplot says 'main': Typically a character string or expression describing the main title to be placed on top of each page. [...] So, lattice is fairly explicit, by R standards, in requiring 'main' to be character or expression. On the other hand, ?title says The labels passed to 'title' can be character strings or language objects (names, calls or expressions), or [...] so it additionally accepts names and calls. Now, we have a- 2 foo- bquote(alpha == .(a)) foo # Looks OK alpha == 2 mode(foo) # But [1] call is.expression(foo) # not an expression [1] FALSE is.expression(expression(foo)) ## YES, but [1] TRUE expression(foo) ## not what we want expression(foo) is.expression(as.expression(foo)) [1] TRUE as.expression(foo) ## This IS what we want expression(alpha == 2) So I submit that lattice is behaving exactly as suggested by its documentation. Now you would naturally argue that this is hiding behind technicalities, and if call objects work for plot(), it should work for lattice as well. But watch this: plot(1:10, main = foo) # works perfectly arglist- list(1:10, main = foo) arglist # Looks like what we want [[1]] [1] 1 2 3 4 5 6 7 8 9 10 $main alpha == 2 do.call(plot, arglist) Error in as.graphicsAnnot(main) : object 'alpha' not found ...which I would say is unexpected behaviour, if not a bug. The moral of the story is that unevaluated calls are dangerous objects (try this one out for fun: foo- bquote(q(.(x)), list(x = no)) do.call(plot, list(1:10, main = foo)) ), and carrying them around is not a good idea. Lattice does use the do.call paradigm quite a bit, and I think it might be quite difficult to fix it up to handle non-expression language objects (which will still not fix the type of problem shown above). -Deepayan Thanks very much for this explanation Deepayan. Part of my intention in contributing to this thread was to have something explicit in the archives for future reference, and your reply is excellent in that regard. And many thanks for your work on lattice. David Scott -- _ David Scott Department of Statistics The University of Auckland, PB 92019 Auckland 1142,NEW ZEALAND Phone: +64 9 923 5055, or +64 9 373 7599 ext 85055 Email: d.sc...@auckland.ac.nz, Fax: +64 9 373 7018 Director of Consulting, Department of Statistics __ R-help@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] lattice: how to center a subtitle?
Dear expeRts, I recently asked for a real centered title (see, e.g., http://tolstoy.newcastle.edu.au/R/e13/help/11/01/0135.html). A nice solution (from Deepayan Sarkar) is to use xlab.top instead of main: library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, sub = but subtitles are not centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() My question is whether there is something similar for *sub*titles [so something like xlab.bottom]? As you can see from the plot, the subtitle does not seem to be centered for the human's eye. I would like to center it according to the x-axis label. Cheers, Marius __ R-help@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.
Re: [R] lattice: how to center a subtitle?
On Apr 4, 2011, at 7:39 AM, Marius Hofert wrote: Dear expeRts, I recently asked for a real centered title (see, e.g., http://tolstoy.newcastle.edu.au/R/e13/help/11/01/0135.html) . A nice solution (from Deepayan Sarkar) is to use xlab.top instead of main: library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, sub = but subtitles are not centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() (I realize that those are not really subtitles by a 'lab', but that appears acceptable in your current test case.) My question is whether there is something similar for *sub*titles [so something like xlab.bottom]? As you can see from the plot, the subtitle does not seem to be centered for the human's eye. I would like to center it according to the x-axis label. David Winsemius, MD West Hartford, CT __ R-help@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.
Re: [R] lattice: how to center a subtitle?
Dear David, I intended to use another x-label. But your suggestion brings me to the idea of just using a two-line xlab, so s.th. like print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered\nbla, scales = list(alternating = c(1,1), tck = c(1,0 Thanks! Cheers, Marius On 2011-04-04, at 16:47 , David Winsemius wrote: On Apr 4, 2011, at 7:39 AM, Marius Hofert wrote: Dear expeRts, I recently asked for a real centered title (see, e.g., http://tolstoy.newcastle.edu.au/R/e13/help/11/01/0135.html). A nice solution (from Deepayan Sarkar) is to use xlab.top instead of main: library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, sub = but subtitles are not centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() (I realize that those are not really subtitles by a 'lab', but that appears acceptable in your current test case.) My question is whether there is something similar for *sub*titles [so something like xlab.bottom]? As you can see from the plot, the subtitle does not seem to be centered for the human's eye. I would like to center it according to the x-axis label. David Winsemius, MD West Hartford, CT __ R-help@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.
Re: [R] lattice: how to center a subtitle?
On Apr 4, 2011, at 12:45 PM, Marius Hofert wrote: Dear David, I intended to use another x-label. But your suggestion brings me to the idea of just using a two-line xlab, so s.th. like print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered\nbla, scales = list(alternating = c(1,1), tck = c(1,0 And if you wanted different fontface (underline, italic or bold) then you could use plotmath expressions: xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = expression( atop(but~subtitles2~are~underline(now)~centered, bold(bla) )), scales = list(alternating = c(1,1), tck = c(1,0))) -- David. Thanks! Cheers, Marius On 2011-04-04, at 16:47 , David Winsemius wrote: On Apr 4, 2011, at 7:39 AM, Marius Hofert wrote: Dear expeRts, I recently asked for a real centered title (see, e.g., http://tolstoy.newcastle.edu.au/R/e13/help/11/01/0135.html) . A nice solution (from Deepayan Sarkar) is to use xlab.top instead of main: library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, sub = but subtitles are not centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() (I realize that those are not really subtitles by a 'lab', but that appears acceptable in your current test case.) My question is whether there is something similar for *sub*titles [so something like xlab.bottom]? As you can see from the plot, the subtitle does not seem to be centered for the human's eye. I would like to center it according to the x-axis label. David Winsemius, MD West Hartford, CT David Winsemius, MD West Hartford, CT __ R-help@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.
Re: [R] lattice: how to center a subtitle?
Dear David, do you know how to get plotmath-like symbols in both rows? I tried s.th. like: lab - expression(paste(alpha==1, , , beta==2, sep=)) xlab - substitute(expression( atop(lab==lab., bold(foo)) ), list(lab.=lab)) xyplot(0 ~ 0, xlab = xlab) Cheers, Marius On 2011-04-04, at 18:59 , David Winsemius wrote: On Apr 4, 2011, at 12:45 PM, Marius Hofert wrote: Dear David, I intended to use another x-label. But your suggestion brings me to the idea of just using a two-line xlab, so s.th. like print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered\nbla, scales = list(alternating = c(1,1), tck = c(1,0 And if you wanted different fontface (underline, italic or bold) then you could use plotmath expressions: xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = expression( atop(but~subtitles2~are~underline(now)~centered, bold(bla) )), scales = list(alternating = c(1,1), tck = c(1,0))) -- David. Thanks! Cheers, Marius On 2011-04-04, at 16:47 , David Winsemius wrote: On Apr 4, 2011, at 7:39 AM, Marius Hofert wrote: Dear expeRts, I recently asked for a real centered title (see, e.g., http://tolstoy.newcastle.edu.au/R/e13/help/11/01/0135.html). A nice solution (from Deepayan Sarkar) is to use xlab.top instead of main: library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, sub = but subtitles are not centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() (I realize that those are not really subtitles by a 'lab', but that appears acceptable in your current test case.) My question is whether there is something similar for *sub*titles [so something like xlab.bottom]? As you can see from the plot, the subtitle does not seem to be centered for the human's eye. I would like to center it according to the x-axis label. David Winsemius, MD West Hartford, CT David Winsemius, MD West Hartford, CT __ R-help@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.
Re: [R] lattice: how to center a subtitle?
On Apr 4, 2011, at 1:27 PM, Marius Hofert wrote: Dear David, do you know how to get plotmath-like symbols in both rows? I tried s.th. like: lab - expression(paste(alpha==1, , , beta==2, sep=)) xlab - substitute(expression( atop(lab==lab., bold(foo)) ), list(lab.=lab)) xyplot(0 ~ 0, xlab = xlab) I _did_ have plotmath functions in both rows: But here is your solution: xyplot(0 ~ 0, xlab = expression( atop(paste(alpha==1,, beta==2), bold(bla) )) ) ) Note that `paste` in plotmath is different than `paste` in regular R. It has no `sep` argument. I did try both substitute and bquote on you externally expression, but lattice seems to be doing some non- standard evaluation and I never got it to work. Using what I thought _should_ work, does work with `plot`: x=1;y=2 plot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) But the same expression throws an error with xyplot: x=1;y=2 xyplot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) Error in trellis.skeleton(formula = 0 ~ 0, cond = list(1L), aspect = fill, : could not find function atop -- David. Cheers, Marius On 2011-04-04, at 18:59 , David Winsemius wrote: On Apr 4, 2011, at 12:45 PM, Marius Hofert wrote: Dear David, I intended to use another x-label. But your suggestion brings me to the idea of just using a two-line xlab, so s.th. like print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered\nbla, scales = list(alternating = c(1,1), tck = c(1,0 And if you wanted different fontface (underline, italic or bold) then you could use plotmath expressions: xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = expression( atop(but~subtitles2~are~underline(now)~centered, bold(bla) )), scales = list(alternating = c(1,1), tck = c(1,0))) -- David. Thanks! Cheers, Marius On 2011-04-04, at 16:47 , David Winsemius wrote: On Apr 4, 2011, at 7:39 AM, Marius Hofert wrote: Dear expeRts, I recently asked for a real centered title (see, e.g., http://tolstoy.newcastle.edu.au/R/e13/help/11/01/0135.html) . A nice solution (from Deepayan Sarkar) is to use xlab.top instead of main: library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, sub = but subtitles are not centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() (I realize that those are not really subtitles by a 'lab', but that appears acceptable in your current test case.) My question is whether there is something similar for *sub*titles [so something like xlab.bottom]? As you can see from the plot, the subtitle does not seem to be centered for the human's eye. I would like to center it according to the x- axis label. David Winsemius, MD West Hartford, CT David Winsemius, MD West Hartford, CT David Winsemius, MD West Hartford, CT __ R-help@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.
Re: [R] lattice: how to center a subtitle?
On 2011-04-04 10:27, Marius Hofert wrote: Dear David, do you know how to get plotmath-like symbols in both rows? I tried s.th. like: lab- expression(paste(alpha==1, , , beta==2, sep=)) xlab- substitute(expression( atop(lab==lab., bold(foo)) ), list(lab.=lab)) xyplot(0 ~ 0, xlab = xlab) Marius, I always find paste a bit tricky with plotmath. Maybe this will do what you want: mylab - expression( atop(lab==list(alpha==1, beta==2), bold(foo)) ) xyplot(0 ~ 0, xlab = mylab) Peter Ehlers Cheers, Marius On 2011-04-04, at 18:59 , David Winsemius wrote: On Apr 4, 2011, at 12:45 PM, Marius Hofert wrote: Dear David, I intended to use another x-label. But your suggestion brings me to the idea of just using a two-line xlab, so s.th. like print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered\nbla, scales = list(alternating = c(1,1), tck = c(1,0 And if you wanted different fontface (underline, italic or bold) then you could use plotmath expressions: xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = expression( atop(but~subtitles2~are~underline(now)~centered, bold(bla) )), scales = list(alternating = c(1,1), tck = c(1,0))) -- David. Thanks! Cheers, Marius On 2011-04-04, at 16:47 , David Winsemius wrote: On Apr 4, 2011, at 7:39 AM, Marius Hofert wrote: Dear expeRts, I recently asked for a real centered title (see, e.g., http://tolstoy.newcastle.edu.au/R/e13/help/11/01/0135.html). A nice solution (from Deepayan Sarkar) is to use xlab.top instead of main: library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, sub = but subtitles are not centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() (I realize that those are not really subtitles by a 'lab', but that appears acceptable in your current test case.) My question is whether there is something similar for *sub*titles [so something like xlab.bottom]? As you can see from the plot, the subtitle does not seem to be centered for the human's eye. I would like to center it according to the x-axis label. David Winsemius, MD West Hartford, CT David Winsemius, MD West Hartford, CT __ R-help@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@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.
Re: [R] lattice: how to center a subtitle?
Maybe: xyplot(0 ~ 0, xlab = bquote(expression(atop(alpha==.(x)*,~beta==.(y), bold(foo) )) )) On Mon, Apr 4, 2011 at 2:58 PM, David Winsemius dwinsem...@comcast.net wrote: On Apr 4, 2011, at 1:27 PM, Marius Hofert wrote: Dear David, do you know how to get plotmath-like symbols in both rows? I tried s.th. like: lab - expression(paste(alpha==1, , , beta==2, sep=)) xlab - substitute(expression( atop(lab==lab., bold(foo)) ), list(lab.=lab)) xyplot(0 ~ 0, xlab = xlab) I _did_ have plotmath functions in both rows: But here is your solution: xyplot(0 ~ 0, xlab = expression( atop(paste(alpha==1, , beta==2), bold(bla) )) ) ) Note that `paste` in plotmath is different than `paste` in regular R. It has no `sep` argument. I did try both substitute and bquote on you externally expression, but lattice seems to be doing some non-standard evaluation and I never got it to work. Using what I thought _should_ work, does work with `plot`: x=1;y=2 plot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) But the same expression throws an error with xyplot: x=1;y=2 xyplot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) Error in trellis.skeleton(formula = 0 ~ 0, cond = list(1L), aspect = fill, : could not find function atop -- David. Cheers, Marius On 2011-04-04, at 18:59 , David Winsemius wrote: On Apr 4, 2011, at 12:45 PM, Marius Hofert wrote: Dear David, I intended to use another x-label. But your suggestion brings me to the idea of just using a two-line xlab, so s.th. like print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered\nbla, scales = list(alternating = c(1,1), tck = c(1,0 And if you wanted different fontface (underline, italic or bold) then you could use plotmath expressions: xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = expression( atop(but~subtitles2~are~underline(now)~centered, bold(bla) )), scales = list(alternating = c(1,1), tck = c(1,0))) -- David. Thanks! Cheers, Marius On 2011-04-04, at 16:47 , David Winsemius wrote: On Apr 4, 2011, at 7:39 AM, Marius Hofert wrote: Dear expeRts, I recently asked for a real centered title (see, e.g., http://tolstoy.newcastle.edu.au/R/e13/help/11/01/0135.html). A nice solution (from Deepayan Sarkar) is to use xlab.top instead of main: library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, sub = but subtitles are not centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() (I realize that those are not really subtitles by a 'lab', but that appears acceptable in your current test case.) My question is whether there is something similar for *sub*titles [so something like xlab.bottom]? As you can see from the plot, the subtitle does not seem to be centered for the human's eye. I would like to center it according to the x-axis label. David Winsemius, MD West Hartford, CT David Winsemius, MD West Hartford, CT David Winsemius, MD West Hartford, CT __ R-help@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. -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40 S 49° 16' 22 O __ R-help@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.
Re: [R] lattice: how to center a subtitle?
Dear all, many thanks, that helped a lot! Cheers, Marius On 2011-04-04, at 19:58 , David Winsemius wrote: On Apr 4, 2011, at 1:27 PM, Marius Hofert wrote: Dear David, do you know how to get plotmath-like symbols in both rows? I tried s.th. like: lab - expression(paste(alpha==1, , , beta==2, sep=)) xlab - substitute(expression( atop(lab==lab., bold(foo)) ), list(lab.=lab)) xyplot(0 ~ 0, xlab = xlab) I _did_ have plotmath functions in both rows: But here is your solution: xyplot(0 ~ 0, xlab = expression( atop(paste(alpha==1,, beta==2), bold(bla) )) ) ) Note that `paste` in plotmath is different than `paste` in regular R. It has no `sep` argument. I did try both substitute and bquote on you externally expression, but lattice seems to be doing some non-standard evaluation and I never got it to work. Using what I thought _should_ work, does work with `plot`: x=1;y=2 plot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) But the same expression throws an error with xyplot: x=1;y=2 xyplot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) Error in trellis.skeleton(formula = 0 ~ 0, cond = list(1L), aspect = fill, : could not find function atop -- David. Cheers, Marius On 2011-04-04, at 18:59 , David Winsemius wrote: On Apr 4, 2011, at 12:45 PM, Marius Hofert wrote: Dear David, I intended to use another x-label. But your suggestion brings me to the idea of just using a two-line xlab, so s.th. like print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered\nbla, scales = list(alternating = c(1,1), tck = c(1,0 And if you wanted different fontface (underline, italic or bold) then you could use plotmath expressions: xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = expression( atop(but~subtitles2~are~underline(now)~centered, bold(bla) )), scales = list(alternating = c(1,1), tck = c(1,0))) -- David. Thanks! Cheers, Marius On 2011-04-04, at 16:47 , David Winsemius wrote: On Apr 4, 2011, at 7:39 AM, Marius Hofert wrote: Dear expeRts, I recently asked for a real centered title (see, e.g., http://tolstoy.newcastle.edu.au/R/e13/help/11/01/0135.html). A nice solution (from Deepayan Sarkar) is to use xlab.top instead of main: library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, sub = but subtitles are not centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() library(lattice) trellis.device(pdf) print(xyplot(0 ~ 0, xlab.top = This title is now 'centered' for the human's eye, xlab = but subtitles are _now_ centered, scales = list(alternating = c(1,1), tck = c(1,0 dev.off() (I realize that those are not really subtitles by a 'lab', but that appears acceptable in your current test case.) My question is whether there is something similar for *sub*titles [so something like xlab.bottom]? As you can see from the plot, the subtitle does not seem to be centered for the human's eye. I would like to center it according to the x-axis label. David Winsemius, MD West Hartford, CT David Winsemius, MD West Hartford, CT David Winsemius, MD West Hartford, CT __ R-help@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.
Re: [R] lattice: how to center a subtitle?
On 05/04/11 05:58, David Winsemius wrote: On Apr 4, 2011, at 1:27 PM, Marius Hofert wrote: Dear David, do you know how to get plotmath-like symbols in both rows? I tried s.th. like: lab- expression(paste(alpha==1, , , beta==2, sep=)) xlab- substitute(expression( atop(lab==lab., bold(foo)) ), list(lab.=lab)) xyplot(0 ~ 0, xlab = xlab) I _did_ have plotmath functions in both rows: But here is your solution: xyplot(0 ~ 0, xlab = expression( atop(paste(alpha==1,, beta==2), bold(bla) )) ) ) Note that `paste` in plotmath is different than `paste` in regular R. It has no `sep` argument. I did try both substitute and bquote on you externally expression, but lattice seems to be doing some non- standard evaluation and I never got it to work. Using what I thought _should_ work, does work with `plot`: x=1;y=2 plot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) But the same expression throws an error with xyplot: x=1;y=2 xyplot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) Error in trellis.skeleton(formula = 0 ~ 0, cond = list(1L), aspect = fill, : could not find function atop I am not sure where I read it and I can't find it again, but my understanding is that expressions using bquote with lattice need to be enclosed in as.expression() to work. That is in contrast to what happens in base graphics. Here is a simple example. a - 2 plot(1:10, a*(1:10), main = bquote(alpha == .(a))) require(lattice) xyplot(a*(1:10)~ 1:10, main = bquote(alpha == .(a))) xyplot(a*(1:10)~ 1:10, main = as.expression(bquote(alpha == .(a Which produces: a - 2 plot(1:10, a*(1:10), main = bquote(alpha == .(a))) require(lattice) Loading required package: lattice xyplot(a*(1:10)~ 1:10, main = bquote(alpha == .(a))) Error in trellis.skeleton(formula = a * (1:10) ~ 1:10, cond = list(c(1L, : object 'alpha' not found xyplot(a*(1:10)~ 1:10, main = as.expression(bquote(alpha == .(a Using expression() rather than as.expression() doesn't produce the desired affect. Try it yourself. As to why this is the case . David Scott -- _ David Scott Department of Statistics The University of Auckland, PB 92019 Auckland 1142,NEW ZEALAND Phone: +64 9 923 5055, or +64 9 373 7599 ext 85055 Email: d.sc...@auckland.ac.nz, Fax: +64 9 373 7018 Director of Consulting, Department of Statistics __ R-help@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.
Re: [R] lattice: how to center a subtitle?
On Apr 4, 2011, at 8:42 PM, David Scott wrote: On 05/04/11 05:58, David Winsemius wrote: On Apr 4, 2011, at 1:27 PM, Marius Hofert wrote: Dear David, do you know how to get plotmath-like symbols in both rows? I tried s.th. like: lab- expression(paste(alpha==1, , , beta==2, sep=)) xlab- substitute(expression( atop(lab==lab., bold(foo)) ), list(lab.=lab)) xyplot(0 ~ 0, xlab = xlab) I _did_ have plotmath functions in both rows: But here is your solution: xyplot(0 ~ 0, xlab = expression( atop(paste(alpha==1,, beta==2), bold(bla) )) ) ) Note that `paste` in plotmath is different than `paste` in regular R. It has no `sep` argument. I did try both substitute and bquote on you externally expression, but lattice seems to be doing some non- standard evaluation and I never got it to work. Using what I thought _should_ work, does work with `plot`: x=1;y=2 plot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) But the same expression throws an error with xyplot: x=1;y=2 xyplot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) Error in trellis.skeleton(formula = 0 ~ 0, cond = list(1L), aspect = fill, : could not find function atop I am not sure where I read it and I can't find it again, but my understanding is that expressions using bquote with lattice need to be enclosed in as.expression() to work. That is in contrast to what happens in base graphics. Here is a simple example. a - 2 plot(1:10, a*(1:10), main = bquote(alpha == .(a))) require(lattice) xyplot(a*(1:10)~ 1:10, main = bquote(alpha == .(a))) xyplot(a*(1:10)~ 1:10, main = as.expression(bquote(alpha == .(a Which produces: a - 2 plot(1:10, a*(1:10), main = bquote(alpha == .(a))) require(lattice) Loading required package: lattice xyplot(a*(1:10)~ 1:10, main = bquote(alpha == .(a))) Error in trellis.skeleton(formula = a * (1:10) ~ 1:10, cond = list(c(1L, : object 'alpha' not found xyplot(a*(1:10)~ 1:10, main = as.expression(bquote(alpha == .(a Using expression() rather than as.expression() doesn't produce the desired affect. Try it yourself. I did. Your theory seems supported by the experimental evidence: lab - bquote(paste(alpha==1, , , beta==2)) xyplot(0 ~ 0, xlab = as.expression(bquote(atop(.(lab), bold(foo) ) ))) # Works! As to why this is the case . Right. It does seem as though we should need to be deducing the inner workings of the subatomic particles by throwing text at the interpreter though. -- David Winsemius, MD West Hartford, CT __ R-help@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.
Re: [R] lattice: how to center a subtitle?
On Apr 4, 2011, at 9:03 PM, David Winsemius wrote: On Apr 4, 2011, at 8:42 PM, David Scott wrote: On 05/04/11 05:58, David Winsemius wrote: On Apr 4, 2011, at 1:27 PM, Marius Hofert wrote: Dear David, do you know how to get plotmath-like symbols in both rows? I tried s.th. like: lab- expression(paste(alpha==1, , , beta==2, sep=)) xlab- substitute(expression( atop(lab==lab., bold(foo)) ), list(lab.=lab)) xyplot(0 ~ 0, xlab = xlab) I _did_ have plotmath functions in both rows: But here is your solution: xyplot(0 ~ 0, xlab = expression( atop(paste(alpha==1,, beta==2), bold(bla) )) ) ) Note that `paste` in plotmath is different than `paste` in regular R. It has no `sep` argument. I did try both substitute and bquote on you externally expression, but lattice seems to be doing some non- standard evaluation and I never got it to work. Using what I thought _should_ work, does work with `plot`: x=1;y=2 plot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) But the same expression throws an error with xyplot: x=1;y=2 xyplot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) Error in trellis.skeleton(formula = 0 ~ 0, cond = list(1L), aspect = fill, : could not find function atop I am not sure where I read it and I can't find it again, but my understanding is that expressions using bquote with lattice need to be enclosed in as.expression() to work. That is in contrast to what happens in base graphics. Perhaps here: http://finzi.psych.upenn.edu/Rhelp10/2010-August/250832.html Or here: http://finzi.psych.upenn.edu/Rhelp10/2009-July/203714.html Although I disagree with Heimstra that reading the help(bquote) provides more details that might shed light on why this is so. -- David. Here is a simple example. a - 2 plot(1:10, a*(1:10), main = bquote(alpha == .(a))) require(lattice) xyplot(a*(1:10)~ 1:10, main = bquote(alpha == .(a))) xyplot(a*(1:10)~ 1:10, main = as.expression(bquote(alpha == .(a Which produces: a - 2 plot(1:10, a*(1:10), main = bquote(alpha == .(a))) require(lattice) Loading required package: lattice xyplot(a*(1:10)~ 1:10, main = bquote(alpha == .(a))) Error in trellis.skeleton(formula = a * (1:10) ~ 1:10, cond = list(c(1L, : object 'alpha' not found xyplot(a*(1:10)~ 1:10, main = as.expression(bquote(alpha == .(a Using expression() rather than as.expression() doesn't produce the desired affect. Try it yourself. I did. Your theory seems supported by the experimental evidence: lab - bquote(paste(alpha==1, , , beta==2)) xyplot(0 ~ 0, xlab = as.expression(bquote(atop(.(lab), bold(foo) ) ))) # Works! As to why this is the case . Right. It does seem as though we should need to be deducing the inner workings of the subatomic particles by throwing text at the interpreter though. -- David Winsemius, MD West Hartford, CT __ R-help@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. David Winsemius, MD West Hartford, CT __ R-help@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.
Re: [R] lattice: how to center a subtitle?
On 05/04/11 13:14, David Winsemius wrote: On Apr 4, 2011, at 9:03 PM, David Winsemius wrote: On Apr 4, 2011, at 8:42 PM, David Scott wrote: On 05/04/11 05:58, David Winsemius wrote: On Apr 4, 2011, at 1:27 PM, Marius Hofert wrote: Dear David, do you know how to get plotmath-like symbols in both rows? I tried s.th. like: lab- expression(paste(alpha==1, , , beta==2, sep=)) xlab- substitute(expression( atop(lab==lab., bold(foo)) ), list(lab.=lab)) xyplot(0 ~ 0, xlab = xlab) I _did_ have plotmath functions in both rows: But here is your solution: xyplot(0 ~ 0, xlab = expression( atop(paste(alpha==1,, beta==2), bold(bla) )) ) ) Note that `paste` in plotmath is different than `paste` in regular R. It has no `sep` argument. I did try both substitute and bquote on you externally expression, but lattice seems to be doing some non- standard evaluation and I never got it to work. Using what I thought _should_ work, does work with `plot`: x=1;y=2 plot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) But the same expression throws an error with xyplot: x=1;y=2 xyplot(0 ~ 0, xlab = bquote( atop(alpha==.(x)*,~beta==.(y), bold(foo) ) ) + ) Error in trellis.skeleton(formula = 0 ~ 0, cond = list(1L), aspect = fill, : could not find function atop I am not sure where I read it and I can't find it again, but my understanding is that expressions using bquote with lattice need to be enclosed in as.expression() to work. That is in contrast to what happens in base graphics. Perhaps here: http://finzi.psych.upenn.edu/Rhelp10/2010-August/250832.html I am pretty sure that was where I saw it. I knew it was out there somewhere. Or here: http://finzi.psych.upenn.edu/Rhelp10/2009-July/203714.html Although I disagree with Heimstra that reading the help(bquote) provides more details that might shed light on why this is so. David Scott -- _ David Scott Department of Statistics The University of Auckland, PB 92019 Auckland 1142,NEW ZEALAND Phone: +64 9 923 5055, or +64 9 373 7599 ext 85055 Email: d.sc...@auckland.ac.nz, Fax: +64 9 373 7018 Director of Consulting, Department of Statistics __ R-help@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.
