I sent you an updated response to deal with the redundant copies of the x-axis.
Re-sending.
par(mfrow=c(3,1))
plot(DAX.[, 1], log='y', ylab='DAX', xaxt="n")
plot(DAX.[, 2], ylab='vel (%)', xaxt="n")
plot(DAX.[, 3], ylab='accel (%)')
On Wed, May 31, 2023 at 4:27 PM Spencer Graves
<spencer.gra...@effectivedefense.org> wrote:
>
>
>
> On 5/30/23 10:23 AM, Eric Berger wrote:
> > What if you just precede these commands as follows:
> >
> > par(mfrow=c(3,1))
> > plot(DAX.[, 1], log='y', ylab='DAX')
> > plot(DAX.[, 2], ylab='vel (%)')
> > plot(DAX.[, 3], ylab='accel (%)')
>
> Most of the space is consumed with two extraneous copies of the
> axis.
> We can get around that with three calls to par:
>
>
> op <- par(mfrow=c(3,1), mar=c(0, 4.1, 4.1, 2.1))
> plot(DAX.[, 1], log='y', ylab='DAX')
> par(mar=c(0, 4.1, 0, 2.1))
> plot(DAX.[, 2], ylab='vel (%)')
> par(mar=c(5.1, 4.1, 0, 2.1))
> plot(DAX.[, 3], ylab='accel (%)')
> par(op)
>
>
> However, the three panels are NOT equal in size: roughly 30% vs.
> 44%
> vs. 26%. I can get closer using layout, but if I change the aspect
> ratio, it changes the relationship between the heights of the three
> panels.
>
>
> That's the problem I'm trying to solve. It's also why it makes
> sense
> to me to modify plot.ts to accept a vector for the log argument, with
> the constraint that length(lot) = either 1 or ncol(x).
>
>
> There may be a way to do it using gglot2 / the tidyverse, but I'm
> not
> facile with that, and my web searches have so far failed to produce
> anything better than modifying plot.ts.R (and then submitting such with
> compatible changes to plot.ts.Rd), as I suggested earlier.
>
>
> ???
> Thanks,
> Spencer
>
> >
> > On Tue, May 30, 2023 at 5:45 PM Spencer Graves
> > <spencer.gra...@effectivedefense.org> wrote:
> >>
> >>
> >>
> >> On 5/30/23 8:48 AM, Eric Berger wrote:
> >>> I am a bit confused as to what you are trying to achieve - and even
> >>> if I could guess it is not clear what the interpretation would be.
> >>>> head(DAX)
> >>> 1628.75 1613.63 1606.51 1621.04 1618.16 1610.61
> >>>
> >>> Including the leading NA's, what would be the 6 leading terms of the 3
> >>> series that you want to plot,
> >>> and what would be the Y labels that you want to appear at those levels
> >>> (assuming that there was a
> >>> Y label for each of them - just to understand the units you are talking
> >>> about)
> >>
> >>
> >> DAX <- EuStockMarkets[, 'DAX']
> >> DAX. <- cbind(DAX, diff(log(DAX)), diff(diff(log(DAX))))
> >> colnames(DAX.) <- c("DAX", 'vel (%)', 'accel (%)')
> >> head(DAX.)
> >>
> >>
> >> DAX exhibits growth that is roughly exponential, so I want to
> >> plot it
> >> on a log scale:
> >>
> >>
> >> plot(DAX.[, 1], log='y', ylab='DAX')
> >> plot(DAX.[, 2], ylab='vel (%)')
> >> plot(DAX.[, 3], ylab='accel (%)')
> >>
> >>
> >> This is what I want as three panels of a single plot.
> >>
> >>
> >> I think I could get it by modifying the code for plot.ts so it
> >> accepted ylab as a vector, etc., as I previously mentioned.
> >>
> >>
> >> What do you think?
> >> Thanks,
> >> Spencer Graves
> >>>
> >>>
> >>> On Tue, May 30, 2023 at 4:06 PM Spencer Graves
> >>> <spencer.gra...@effectivedefense.org> wrote:
> >>>>
> >>>>
> >>>>
> >>>> On 5/30/23 6:16 AM, Eric Berger wrote:
> >>>>> My code assumes that DAX is a ts object, as in your original post.
> >>>>>
> >>>>> On Tue, May 30, 2023 at 2:06 PM Eric Berger <ericjber...@gmail.com>
> >>>>> wrote:
> >>>>>>
> >>>>>> Untested but why not
> >>>>>>
> >>>>>> a <- cbind(log(DAX), exp(diff(log(DAX))), exp(diff(diff(log(DAX)))))
> >>>>>> colnames(a) <- c("logDAX", "vel", "accel")
> >>>>>> plot(a)
> >>>>
> >>>>
> >>>> Progress, but we're not there yet.
> >>>>
> >>>>
> >>>> a <- cbind(DAX, exp(diff(log(DAX))), exp(diff(diff(log(DAX)))))
> >>>> colnames(a) <- c("logDAX", "vel", "accel")
> >>>> plot(a)
> >>>> plot(a, axes=FALSE, log='y')
> >>>> axis(1)
> >>>> axis(2)
> >>>>
> >>>>
> >>>> How do I get each y axis labeled in its original units? I
> >>>> can use
> >>>> pretty to get where I want tick marks, but I don't know where to place
> >>>> them "at" in calling axis(2, at= ___)?
> >>>>
> >>>>
> >>>> (axlb1 <- pretty(range(a[, 1])))
> >>>> (axlb2 <- pretty(range(log(a[, 2]), na.rm=TRUE)))
> >>>> (axlb3 <- pretty(range(log(a[, 3]), na.rm=TRUE)))
> >>>>
> >>>>
> >>>> This suggests I write my own modification of plot.ts that
> >>>> accepts log
> >>>> as a character vector of length = ncol of the ts being plotted and
> >>>> returns invisibly a list with the default "at" and "label" arguments
> >>>> required to produce the default labeling. Then a user who wants a log
> >>>> scale for some but not all variables can get that easily and can further
> >>>> modify any of those scales further if they don't like the default.
> >>>>
> >>>>
> >>>> ???
> >>>> Thanks very much.
> >>>> Spencer Graves
> >>>>>>
> >>>>>>
> >>>>>> On Tue, May 30, 2023 at 1:46 PM Spencer Graves
> >>>>>> <spencer.gra...@effectivedefense.org> wrote:
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>> On 5/29/23 2:37 AM, Eric Berger wrote:
> >>>>>>>> How about this:
> >>>>>>>>
> >>>>>>>> a <- cbind(AirPassengers, diff(log(AirPassengers)),
> >>>>>>>> diff(diff(log(AirPassengers))))
> >>>>>>>> colnames(a)[2:3] <- c("percent increase", "acceleration")
> >>>>>>>> plot(a, xlab="year", main="AirPassengers")
> >>>>>>>
> >>>>>>>
> >>>>>>> My real problem is more difficult: I'm analyzing CO2
> >>>>>>> data from Our
> >>>>>>> World in Data (https://ourworldindata.org/co2-emissions), and I need
> >>>>>>> to
> >>>>>>> plot the CO2 data on a log scale but velocity and acceleration on
> >>>>>>> linear
> >>>>>>> scales. The following is comparable:
> >>>>>>>
> >>>>>>>
> >>>>>>> str(DAX <- EuStockMarkets[, 'DAX'])
> >>>>>>> str(DAX. <- cbind(DAX, diff(log(DAX)),
> >>>>>>> diff(diff(log(DAX)))))
> >>>>>>> colnames(DAX.)[2:3] <- c('vel', 'accel')
> >>>>>>> plot(DAX.)
> >>>>>>>
> >>>>>>>
> >>>>>>> I want the first of the three panels to plot on the log
> >>>>>>> scale, but
> >>>>>>> the other two on linear scales. The obvious attempt does not work:
> >>>>>>>
> >>>>>>>
> >>>>>>> plot(DAX., log=c('y', '', ''))
> >>>>>>> #Error in length(log) && log != "" :
> >>>>>>> # 'length = 3' in coercion to 'logical(1)'
> >>>>>>>
> >>>>>>>
> >>>>>>> Trying to construct my own axes isn't easy, either:
> >>>>>>>
> >>>>>>>
> >>>>>>> str(logDAX <- cbind(log(DAX), diff(log(DAX)),
> >>>>>>> diff(diff(log(DAX)))))
> >>>>>>> colnames(logDAX) <- c('logDAX', 'vel', 'accel')
> >>>>>>> plot(logDAX, axes=FALSE)
> >>>>>>> axis(1)
> >>>>>>> axis(2)
> >>>>>>>
> >>>>>>>
> >>>>>>> I'm thinking of creating my own copy of "plot.ts", and
> >>>>>>> changing it so
> >>>>>>> it accepts the "log" argument as a vector of length equal to ncol of
> >>>>>>> the
> >>>>>>> ts object to be plotted AND returning an object that would allow a
> >>>>>>> user
> >>>>>>> to call "axis" ncol times.
> >>>>>>>
> >>>>>>>
> >>>>>>> Suggestions?
> >>>>>>>
> >>>>>>>
> >>>>>>> Thanks,
> >>>>>>> Spencer Graves
> >>>>>>>
> >>>>>>>>
> >>>>>>>> HTH,
> >>>>>>>> Eric
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> On Mon, May 29, 2023 at 7:57 AM Spencer Graves
> >>>>>>>> <spencer.gra...@effectivedefense.org> wrote:
> >>>>>>>>>
> >>>>>>>>> Hello, All:
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> I want to plot level, velocity, and acceleration in
> >>>>>>>>> three panels with
> >>>>>>>>> only one x axis. The code below does this using "layout".
> >>>>>>>>> However, I
> >>>>>>>>> want the three plot areas to be of equal size, and this won't do
> >>>>>>>>> that:
> >>>>>>>>> If I stretch the plot vertically, the relative sizes of the three
> >>>>>>>>> panels
> >>>>>>>>> changes. There's probably a way to do this with ggplot2, but I
> >>>>>>>>> have yet
> >>>>>>>>> to find it.
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> Suggestions?
> >>>>>>>>> Thanks,
> >>>>>>>>> Spencer Graves
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> str(AirTime <- as.numeric(time(AirPassengers)))
> >>>>>>>>> str(AP <- as.numeric(AirPassengers))
> >>>>>>>>>
> >>>>>>>>> def.par <- par(no.readonly = TRUE) # save default, for resetting...
> >>>>>>>>> (mat3x1 <- matrix(1:3, 3))
> >>>>>>>>> plot3x1 <- layout(mat3x1, heights=c(1.4, 1, 1.5))
> >>>>>>>>> layout.show(plot3x1)
> >>>>>>>>>
> >>>>>>>>> par(mar=c(0, 4.1, 4.1, 2.1))
> >>>>>>>>> plot(AirTime, AP, log='y', type='l', axes=FALSE,
> >>>>>>>>> main='AirPassengers', ylab='AirPassengers')
> >>>>>>>>> box(col='grey')
> >>>>>>>>> axis(2, las=1)
> >>>>>>>>>
> >>>>>>>>> par(mar=c(0, 4.1, 0, 2.1))
> >>>>>>>>> vAP <- diff(log(AP))
> >>>>>>>>> plot(tail(AirTime, -1), vAP, type='l',
> >>>>>>>>> ylab='percent increase', axes=FALSE)
> >>>>>>>>> box(col='grey')
> >>>>>>>>> axis(2, las=1)
> >>>>>>>>>
> >>>>>>>>> par(mar=c(5.1, 4.1, 0, 2.1))
> >>>>>>>>> plot(tail(AirTime, -2), diff(vAP), type='l',
> >>>>>>>>> ylab='acceleration', xlab='year',
> >>>>>>>>> las=1)
> >>>>>>>>> box(col='grey')
> >>>>>>>>>
> >>>>>>>>> par(def.par)
> >>>>>>>>>
> >>>>>>>>> ______________________________________________
> >>>>>>>>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >>>>>>>>> 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.
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