newline in expression

[scott_chamberlain]

Hello, 

I have searched for this topic and it appears that a newline can not be incorporated into expression() within a ggplot call directly (but can with use of gridextra I believe). 

I have a very simple case and just want a newline to separate the text from the x-axis by one line. 

For example: 

qplot(1,1, geom="blank") + 

  labs(x = expression(paste("Distribution of node ages, ", italic(gamma))))

produces the attached plot. I simply want that x-axis title one more line away from the axis. Apologies if I have missed an obvious solution. 

Thanks, Scott

[Brian Diggs]

Newlines can't, but atop's can.

qplot(1,1, geom="blank") +

labs(x = expression(atop(,paste("Distribution of node ages, ",
italic(gamma)))))

I wouldn't consider it an obvious solution, but a hack that works.

> Thanks, Scott

--
Brian S. Diggs, PhD
Senior Research Associate, Department of Surgery
Oregon Health & Science University

[scott_chamberlain]

Great! Thanks so much Brian. 

S

[baptiste auguie]

Hi,

I may be missing something, but why do you need inserting a newline
rather than shifting the x title?

last_plot() + opts(axis.title.x = theme_text(vjust=-2),
plot.margin=unit(c(1, 1, 2, 0.5), "lines"))

b.

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[scott_chamberlain]

Ahhh. Nice. I didn't think of just shifting the title position. 

Thanks so much Baptiste. 

Scott

[patrick kilduff]

Hi Scott -

Using xlab() instead of labs(), move the axis label one line further from the plot for me.

qplot(1,1, geom="blank") + 

+   xlab(expression(paste("\nDistribution of node ages, ", italic(gamma)))

- Patrick 

---

From: scott_chamberlain <myrmec...@gmail.com>
To: ggp...@googlegroups.com
Sent: Monday, October 3, 2011 10:14 AM
Subject: newline in expression