Hi Adrian,

This is probably taking a long time. I first tried with 7x10^6 times

and values and it took several minutes. The following code does what I

expected:

amdat<-data.frame(time=1:700000,value=rnorm(700000,-4))

amdat$value[amdat$value<0]<-0

sum(amdat$value)

[1] 5.07101

plot(amdat$time,amdat$value)

plot(amdat$time,amdat$value,type="l")

Perhaps convert the time series to two ordinary vectors?

Jim

On Sat, Apr 23, 2016 at 9:37 PM, Adrian Mcmenamin <

[hidden email]> wrote:

> I have a time series with many millions of points.

>

> Each point is of the form (time, value) but where the value is 0 there is

> no record - ie the data set is sparse.

>

> If I plot this using plot(myData) I get a correct plot going from time 0 to

> time 7x10e7.

>

> Given that there are many millions of points (it's not *that* sparse), this

> looks very busy.

>

> But if I attempt to plot this as a line - plot(myData, type="l") - the plot

> is wrong (it looks like solid semi-sinusoidal curves) and although the

> x-axis is drawn from 0 to 7x10e7, the plotting stops at about 3x10e7.

>

> The same thing is seen if I use plot(myData[[1]], myData[[2]], type="l").

>

> If I use plot(myData[[2]], myData[[1]], type="l") I do get a line (albeit

> that the orientation seems odd), but again, while the y-axis is drawn

> between 0 and 7x10e7, the plotting again seems to stop at 3x10e7 or

> thereabouts.

>

> What have I got wrong? How can I get a line (preferably with the standard

> orientation)?

>

> Adrian

>

> [[alternative HTML version deleted]]

>

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https://stat.ethz.ch/mailman/listinfo/r-helpPLEASE do read the posting guide

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