Re: [Gnuplot-info] Errorbars not showing if specified as time/date data

[Federico M. <fed...@gm...>]

Marek, Hans,

On Mon, Aug 26, 2013 at 11:15 PM, Hans-Bernhard Bröker
<HBB...@t-...> wrote:

>> I am using gnuplot 4.4 patchlevel 4 (compied via homebrew) on Mac OS X
>> 10.7.5 (GCC 4.2.1).
>
> Hmmm... if you're compiling your own gnuplot, why would you pick such an
> outdated version?

I've upgraded to 4.6: the remainder of this email refers to tests
conducted with 4.6 patchlevel 3.

On Mon, Aug 26, 2013 at 8:01 PM, Marek W. Gutowski <gu...@if...> wrote:
> Looks like you error column (3) is not always in correct (time) format.
> Otherwise the plot is as expected, I don't see anything wrong with it.

that was my point:

1) this script shows *no* errobars, whereas it should:

# code: https://gist.github.com/4dfa75d1eeb7f4e5b54f
# screenshot: http://screencast.com/t/jUY84naoxltV
reset
set timefmt "%H:%M:%S"
set ydata time
plot "-" u 1:2:3 w yerrorbars t ''
1 00:02:16 00:00:52
2 00:02:14 00:02:00
3 00:02:01 00:00:52
4 00:01:58 00:00:52
5 00:01:45 00:00:52
6 00:01:32 00:01:01
7 00:01:32 00:00:52
8 00:01:22 00:00:52
9 00:01:17 00:00:52


2) this script shows errobars correctly, as expected:

# code: https://gist.github.com/c15f8ddc754f330acda7
# screenshot: http://screencast.com/t/VycQZFvRrlU
reset
plot "-" u 1:2:3 w yerrorbars t 'Script 2'
1 16 2
2 14 0
3 01 2
4 58 2
5 45 2
6 32 1
7 32 2
8 22 2
9 17 2


3) this script (correctly) shows the errorbars if these are specified
as plain integers, whereas it does not shows any errorbars if these
are specified as time values. Why?

# code: https://gist.github.com/d52c622c19c2103792d4
# screenshot: http://screencast.com/t/cPucckjITl

reset
set timefmt "%H:%M:%S"
set ydata time
plot "-" u 1:2:3 w yerrorbars t 'Script 3'
1 00:02:16 00:00:52
2 00:02:14 00:02:00
3 00:02:01 2
4 00:01:58 1.1
5 00:01:45 2.3
6 00:01:32 00:01:01
7 00:01:32 1.5
8 00:01:22 2
9 00:01:17 3

> Why the last character in your plot command is "t"?

it's the (empty) title specification.

-F