[R] Multi-line graph?

2010-10-15 Thread barnhillec

Hi,

I am relatively new to R but not to graphing, which I used to do in Excel
and a few other environments on the job. I'm going back to school for a PhD
and am teaching myself R beforehand. So I hope this question is not
unacceptably ignorant but I have perused every entry level document I can
find and so far I'm out of luck.

I'm trying to graph some simple music psychology data. Columns are musical
intervals, rows are the initials of the subjects. Numbers are in beats per
minute (this is the value at which they hear the melodic interval split into
two streams). So here's my table:

 Tenth Fifth Third
GG 112152   168
EC  100120   140
SQ  160   184NA
SK   120   100   180

I want a multi-line graph where the intervals are on the X axis, and the y
axis is the beats per minute, and each subject has a different line. In
Excel this would be no problem but I am having trouble in R.

The only way I can figure out how to plot this in R is if the columns or
rows are taken as variables. But the variable is beats per minute. Any
suggestions?

I appreciate the help. -Eric
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Re: [R] Multi-line graph?

2010-10-15 Thread Dieter Menne


barnhillec wrote:
 
 I'm trying to graph some simple music psychology data. Columns are musical
 intervals, rows are the initials of the subjects. Numbers are in beats per
 minute (this is the value at which they hear the melodic interval split
 into two streams). So here's my table:
 
  Tenth Fifth Third
 GG 112152   168
 EC  100120   140
 SQ  160   184NA
 SK   120   100   180
 
 I want a multi-line graph where the intervals are on the X axis, and the y
 axis is the beats per minute, and each subject has a different line. 
 
 
The most difficult part of it (at least that's what my students think) is
getting the data into the right format. If you have the changes to start
with the data in the long format, use it. What you need is:

init interval beats
GC   Tenth112

In this case, reformatting almost works with the default version of the melt
function in package reshape.

It's good that you supplied a data example, but in general it is better if
you could provide it in a copy-and-paste format as shown below. I needed
more time to reformat the data than to write the rest.


Dieter


library(lattice)
library(reshape)
dt = data.frame(
   init  = c(GG,EC, SQ,SK),
   Tenth = c(112,100,160,120),
   Fifth = c(152,120,184,100),
   Third = c(168,140,NA,180))

# The data should look like this
#init interval beats
#GC   Tenth112
#dtlong = melt(dt) # almost does it, but column variable is ugly
dtlong = melt(dt,variable_name=beats) # better
dtlong
   
xyplot(value~variable,groups=init,data=dtlong,type=l, 
auto.key=list(lines=TRUE))





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Re: [R] Multi-line graph?

2010-10-15 Thread William Revelle

?matplot

e.g.,

copy your data to the clipboard then

library(psych)
my.data - read.clipboard()

 my.data

   Tenth Fifth Third
GG   112   152   168
EC   100   120   140
SQ   160   184NA
SK   120   100   180

matplot(t(my.data),type=b)

Bill



At 10:27 AM -0700 10/15/10, barnhillec wrote:

Hi,

I am relatively new to R but not to graphing, which I used to do in Excel
and a few other environments on the job. I'm going back to school for a PhD
and am teaching myself R beforehand. So I hope this question is not
unacceptably ignorant but I have perused every entry level document I can
find and so far I'm out of luck.

I'm trying to graph some simple music psychology data. Columns are musical
intervals, rows are the initials of the subjects. Numbers are in beats per
minute (this is the value at which they hear the melodic interval split into
two streams). So here's my table:

 Tenth Fifth Third
GG 112152   168
EC  100120   140
SQ  160   184NA
SK   120   100   180

I want a multi-line graph where the intervals are on the X axis, and the y
axis is the beats per minute, and each subject has a different line. In
Excel this would be no problem but I am having trouble in R.

The only way I can figure out how to plot this in R is if the columns or
rows are taken as variables. But the variable is beats per minute. Any
suggestions?

I appreciate the help. -Eric
--
View this message in context: 
http://r.789695.n4.nabble.com/Multi-line-graph-tp2997402p2997402.html

Sent from the R help mailing list archive at Nabble.com.

__
R-help@r-project.org mailing list
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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.