[R] plot level, velocity, acceleration with one x axis
Eric Berger
er|cjberger @end|ng |rom gm@||@com
Tue May 30 17:23:59 CEST 2023
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 (%)')
On Tue, May 30, 2023 at 5:45 PM Spencer Graves
<spencer.graves using 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.graves using 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 <ericjberger using 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.graves using 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.graves using 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)
> >>>>>>>
> >>>>>>> ______________________________________________
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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.
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