Hi to all,
Here is a question which I cannot solve. Appreciate so much for any suggestions!
I have a squared region which is irregularly divided into many rectangular
patches.
Each patch is associated with a value, and two patches possibly share a common
value.
I hope to fill in each patch a pattern according to its value. For
instance, if a patch has value 1, then I fill in that patch with
pattern A; if it has value 2, then fill in it with pattern B,...
The pattern is something like a rectangular region with certain colored
lines in it. For instance, pattern A may be a white rectangular region
filled in by two thick black lines;
pattern B may be a white rectagular region filled in by 10 thick black lines,...
Is this available in matlab? I have serached "polygnon" in matlab user
guide and found a
"fill function" may work, however, there is still a long way to
finally complete it.
Many thanks again!
Jeff
[[alternative HTML version deleted]]
The rect function will draw a rectangle and can fill it with diagonal lines at specified angle and density. But before you do that, really consider if and why you want to. Using the diagonal lines became popular when the only way to get quality graphics was with a pen plotter (mechanical arm actually drawing the plot with a pen), filling an area was not reasonable (you could use a really high density of lines, but that usually made you unpopular with everyone else waiting for their turns, and often just wore a hole in your paper). Research has shown (see Tufte's book) that patterns of lines are not the best approach, they can produce what is called the Moire effect which gives an illusion of color and movement. These pattern fills are better at producing headaches and nausea and less effective at conveying information and producing useful plots. -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.snow at imail.org 801.408.8111> -----Original Message----- > From: r-help-bounces at r-project.org [mailto:r-help-bounces at r- > project.org] On Behalf Of St.Jeff Shang > Sent: Wednesday, February 24, 2010 8:34 PM > To: r-help at r-project.org > Subject: [R] How to fill in a region with different patterns? > > Hi to all, > > > > Here is a question which I cannot solve. Appreciate so much for any > suggestions! > > > > I have a squared region which is irregularly divided into many > rectangular patches. > > Each patch is associated with a value, and two patches possibly share a > common value. > > I hope to fill in each patch a pattern according to its value. For > instance, if a patch has value 1, then I fill in that patch with > pattern A; if it has value 2, then fill in it with pattern B,... > > > > The pattern is something like a rectangular region with certain colored > lines in it. For instance, pattern A may be a white rectangular region > filled in by two thick black lines; > > pattern B may be a white rectagular region filled in by 10 thick black > lines,... > > > > Is this available in matlab? I have serached "polygnon" in matlab user > guide and found a > > "fill function" may work, however, there is still a long way to finally > complete it. > > > > Many thanks again! > > Jeff > > > > [[alternative HTML version deleted]] > > ______________________________________________ > 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.
baptiste auguie
2010-Feb-25 21:15 UTC
[R] How to fill in a region with different patterns?
Hi,
If you are curious you might like to try a highly experimental Grid
function I wrote some time ago,
library(grid)
source("http://gridextra.googlecode.com/svn/trunk/R/patternGrob.r")
grid.newpage()
grid.pattern(x=seq(1/6, 5/6, length=6), width=unit(1/8,"npc"),
height=unit(0.5,"npc"),
motif.width=unit(10, "mm"), pattern=c(1:6),
orientation=45, motif.alpha=0.5,
motif.cex=c(1, 0.5), motif.col=1:2, motif.fill=NA,
gp=gpar(fill="blue", lwd=2, alpha=0.5), clip=T)
If you really insist on using shading patterns despite Greg's sound
advice, it might give you some inspiration.
HTH,
baptiste
On 25 February 2010 04:34, St.Jeff Shang <mathshang at yahoo.com>
wrote:> Hi to all,
>
>
>
> Here is a question which I cannot solve. Appreciate so much for any
suggestions!
>
>
>
> I have a squared region which is irregularly divided into many rectangular
patches.
>
> Each patch is associated with a value, and two patches possibly share a
common value.
>
> I hope to fill in each patch a pattern according to its value. For
> instance, if a patch has value 1, then I fill in that patch with
> pattern A; if it has value 2, then fill in it with pattern B,...
>
>
>
> The pattern is something like a rectangular region with certain colored
> lines in it. For instance, pattern A may be a white rectangular region
> filled in by two thick black lines;
>
> pattern B may be a white rectagular region filled in by 10 thick black
lines,...
>
>
>
> Is this available in matlab? I have serached "polygnon" in matlab
user guide and found a
>
> "fill function" may work, however, there is still a long way to
finally complete it.
>
>
>
> Many thanks again!
>
> Jeff
>
>
>
> ? ? ? ?[[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>
--
____________________
Baptiste Augui?
Departamento de Qu?mica F?sica,
Universidade de Vigo,
Campus Universitario, 36310, Vigo, Spain
tel: +34 9868 18617
http://webs.uvigo.es/coloides