Re: [R] fine grain tick marks for zoo plots

From: <tolga.i.uzuner_at_jpmorgan.com>
Date: Wed, 05 Nov 2008 15:08:56 +0000


Hi Gabor,
Thanks very much.

I tried that:

plotmonths<-function(z,...){
 plot(z,xaxt="n",...)
 tt <- time(z)
 m <- unique(as.Date(as.yearmon(tt)))
 jan <- format(m, "%m") == "01"
 mlab <- substr(months(m[!jan]), 1, 1)
 Axis(side = 1, at = m[!jan], labels = mlab, tcl = -0.3, cex.axis = 0.7) #if(abs(as.numeric(head(index(z),1)-tail(index(z),1)))>367) if(any(jan))

        Axis(side = 1, at = m[jan], labels = format(m[jan], "%y"), tcl = -0.7)
 Axis(side = 1, at = unique(as.Date(as.yearqtr(tt))), labels = FALSE)
}

But that fails with the same error message: Error in axis(side, at = z, labels = labels, ...) :   'at' and 'labels' lengths differ, 0 != 1

I think the problem is that, if one has a time series that goes from the 15th of Jan 2008 to 4 Nov 2008, in the absence of the test above, the script attempts to place "08" at the very left when that tick does not really get placed by plot.zoo. By testing that the time series is at least a year long, one ensures that there is space for the "08" tick.

Tolga

"Gabor Grothendieck" <ggrothendieck_at_gmail.com> 05/11/2008 14:47

To
tolga.i.uzuner_at_jpmorgan.com
cc
r-help_at_r-project.org
Subject
Re: [R] fine grain tick marks for zoo plots

Try

if (any(jan)) ...

On Wed, Nov 5, 2008 at 8:55 AM, <tolga.i.uzuner_at_jpmorgan.com> wrote:
>
> By way of follow-up, this will not work if the time series does not run
over
> a year, as the replacement of January by the year fails on the second
call
> to Axis.
>
> The following tests for this:
>
> plotmonths<-function(z,...){
> plot(z,xaxt="n",...)
> tt <- time(z)
> m <- unique(as.Date(as.yearmon(tt)))
> jan <- format(m, "%m") == "01"
> mlab <- substr(months(m[!jan]), 1, 1)
> Axis(side = 1, at = m[!jan], labels = mlab, tcl = -0.3, cex.axis = 0.7)
> if(abs(as.numeric(head(index(z),1)-tail(index(z),1)))>367)
> Axis(side = 1, at = m[jan], labels = format(m[jan], "%y"), tcl =
> -0.7)
> Axis(side = 1, at = unique(as.Date(as.yearqtr(tt))), labels = FALSE)
> }
>
>
>
>
> Tolga I Uzuner/JPMCHASE
>
> 04/11/2008 14:16
>
> To
> "Gabor Grothendieck" <ggrothendieck_at_gmail.com>
> cc
> r-help_at_r-project.org, tolga.i.uzuner_at_jpmorgan.com
> Subject
> Re: [R] fine grain tick marks for zoo plotsLink
>
>
>
> Many thanks all. The following does the trick for me, taken out of the
> vignette:
>
> plotmonths<-function(z,...){
> plot(z,xaxt="n",...)
> tt <- time(z)
> m <- unique(as.Date(as.yearmon(tt)))
> jan <- format(m, "%m") == "01"
> mlab <- substr(months(m[!jan]), 1, 1)
> Axis(side = 1, at = m[!jan], labels = mlab, tcl = -0.3, cex.axis = 0.7)

> Axis(side = 1, at = m[jan], labels = format(m[jan], "%y"), tcl = -0.7)
> Axis(side = 1, at = unique(as.Date(as.yearqtr(tt))), labels = FALSE)
> }
>
> Regards,
> Tolga
>
>
>
>
> "Gabor Grothendieck" <ggrothendieck_at_gmail.com>
>
> 04/11/2008 14:06
>
> To
> tolga.i.uzuner_at_jpmorgan.com
> cc
> r-help_at_r-project.org
> Subject
> Re: [R] fine grain tick marks for zoo plots
>
>
>
>
> And there are additional examples in
> vignette("zoo-faq")
> and
> example(xyplot.zoo)
>
> On Tue, Nov 4, 2008 at 8:26 AM, Gabor Grothendieck
> <ggrothendieck_at_gmail.com> wrote:
>> example(plot.zoo) has an example.
>>
>> On Tue, Nov 4, 2008 at 8:10 AM, <tolga.i.uzuner_at_jpmorgan.com> wrote:
>>> Dear R Users,
>>>
>>> I am trying to get plot.zoo to place monthy tickmarks/labels for a
time
>>> series which spans daily data going back a bit over a year. Right now,
I
>>> am getting only one tick mark on the x-axis for the beginning of 2008.
>>> How
>>> can I force plot.zoo to place more regular x-axis tick marks on a
monthly
>>> basis ?
>>>
>>> Thanks in advance,
>>> Tolga
>>>
>>>
>>> Generally, this communication is for informational purposes only
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>>
>
>
> ________________________________
>
> Generally, this communication is for informational purposes only and it
is
> not intended as an offer or solicitation for the purchase or sale of any
> financial instrument or as an official confirmation of any transaction.
In
> the event you are receiving the offering materials attached below
related to
> your interest in hedge funds or private equity, this communication may
be
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as
> to completeness or accuracy and are subject to change without notice.
Any
> comments or statements made herein do not necessarily reflect those of
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may
> contain information that is privileged, confidential, legally
privileged,
> and/or exempt from disclosure under applicable law. If you are not the
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> responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and
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from
> its use. If you received this transmission in error, please immediately
> contact the sender and destroy the material in its entirety, whether in
> electronic or hard copy format. Thank you. Please refer to
> http://www.jpmorgan.com/pages/disclosures for disclosures relating to UK
> legal entities.

Generally, this communication is for informational purposes only and it is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. In the event you are receiving the offering materials attached below related to your interest in hedge funds or private equity, this communication may be intended as an offer or solicitation for the purchase or sale of such fund(s). All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase & Co., its subsidiaries and affiliates.

This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you.
Please refer to http://www.jpmorgan.com/pages/disclosures for disclosures relating to UK legal entities.

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