Customize pch

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Christoph Ruehlemann

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Mar 1, 2018, 10:34:31 AM3/1/18
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Hi all,

How do you customize point characters for one variable depending on levels in another variable?

For example, in this dataframe:

> dat
             A B
1   0.11254994 X
2   0.12960958 Y
3   0.13028834 X
4   0.14787580 X
5   0.14313576 Y
6  -0.01997931 X
7   0.13029203 X
8   0.15085300 X
9   0.01596402 X
10  0.06396085 Y

how do assign

Christoph Ruehlemann

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Mar 1, 2018, 10:36:31 AM3/1/18
to corplin...@googlegroups.com
Sorry, that got sent off too early:


Hi all,

How do you customize point characters for one variable depending on levels in another variable?

For example, in this dataframe:

> dat
             A         B
1   0.11254994 X
2   0.12960958 Y
3   0.13028834 X
4   0.14787580 X
5   0.14313576 Y
6  -0.01997931 X
7   0.13029203 X
8   0.15085300 X
9   0.01596402 X
10  0.06396085 Y

how do you assign, say, pch=1 to all A-values that have "X" on Variable B and pch=20 to all A-values that have "Y" on Variable B?

Best
Chris

Matías Guzmán Naranjo

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Mar 1, 2018, 10:37:56 AM3/1/18
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dat$pch <- 1
dat[dat$B==Y, "pch"] <- 20

2018-03-01 16:36 GMT+01:00 'Christoph Ruehlemann' via CorpLing with R <corplin...@googlegroups.com>:
Sorry, that got sent off too early:

Hi all,

How do you customize point characters for one variable depending on levels in another variable?

For example, in this dataframe:

> dat
             A         B
1   0.11254994 X
2   0.12960958 Y
3   0.13028834 X
4   0.14787580 X
5   0.14313576 Y
6  -0.01997931 X
7   0.13029203 X
8   0.15085300 X
9   0.01596402 X
10  0.06396085 Y

how do you assign, say, pch=1 to all A-values that have "X" on Variable B and pch=20 to all A-values that have "Y" on Variable B?

Best
Chris

On Thu, Mar 1, 2018 at 4:34 PM, Christoph Ruehlemann <chrisruehlemann@googlemail.com> wrote:
Hi all,

How do you customize point characters for one variable depending on levels in another variable?

For example, in this dataframe:

> dat
             A B
1   0.11254994 X
2   0.12960958 Y
3   0.13028834 X
4   0.14787580 X
5   0.14313576 Y
6  -0.01997931 X
7   0.13029203 X
8   0.15085300 X
9   0.01596402 X
10  0.06396085 Y

how do assign



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Stefan Th. Gries

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Mar 1, 2018, 11:31:32 AM3/1/18
to CorpLing with R
Three suggestions:

# for 2 plotting symbols
set.seed(12)
head(dat <- data.frame(X=rnorm(20), Y=rnorm(20),
PCH=sample(letters[1:2], 20, replace=TRUE))) #
2 plotting symbols
with(dat, plot(X, Y, pch=ifelse(PCH=="a", 1, 20)))

# for n plotting symbols, simpler
set.seed(12)
head(dat <- data.frame(X=rnorm(20), Y=rnorm(20),
PCH=sample(letters[1:5], 20, replace=TRUE)))
with(dat, plot(X, Y, pch=as.numeric(PCH)))
# and of course as.numeric(PCH) could be used with subsetting

# for n plotting symbols, more customizable
with(dat, plot(X, Y, pch=c(20, 18, 16, 1, 10)[as.numeric(PCH)]))

Best,
STG
--
Stefan Th. Gries
----------------------------------
Univ. of California, Santa Barbara
http://tinyurl.com/stgries
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