Error bars missing

[Raiko]

Hello all,

I made a graph with two point-wise traces (see attached MC11 file). After including error bars I noticed that only the first trace's error bars were visible.
First, I assumed that the first trace simply covers the second trace, but then I noticed that the error bar symbol was missing at the Y axis.
Does anybody has a suggestion how to overcome this quirk?

Raiko

[TomGutman]

And where do you suppose that the graph gets the error bar from? The error bar format must be chosen for two consecutive traces, each of the two input data series becomes one of the error bounds.
__________________
� � � � Tom Gutman

[Raiko]

Honestly Tom, I don't understand where the fault is.

Of course, I've chosen error bars for two consecutive traces, but they don't show.

Am I missing something?



Raiko

P.S.

On second thought - the second data column provides the values for the error bars, right?
I was already wondering why the trace option didn't ask for an error range and assumed that it took something like a standard deviation.
Thanks for the hint
Raiko

[RichardJ]

On 9/10/2009 8:19:31 AM, raiko01 wrote:
>Honestly Tom, I don't
>understand where the fault
>is.
Of course, I've chosen
>error bars for two consecutive
>traces, but they don't
>show.
Am I missing
>something?

Raiko

P.S.

On
>second thought - the second
>data column provides the
>values for the error bars,
>right?
I was already wondering
>why the trace option didn't
>ask for an error range and
>assumed that it took something
>like a standard
>deviation.
Thanks for the
>hint
Raiko

You need 3 traces: the data, and the two (which should be consecutive) that represent the upper and lower error bounds.

Richard

[ptc-1368288]

>Honestly Tom, I don't understand where the fault is.<<br> __________________

Look at the Mathsoft work sheet qs, or even at mine !

jmG

[TomGutman]

Not exactly. Both traces provide the error bounds, one is the upper limit, one is the lower limit. Since there are no connecting lines between points it makes no difference which is the uppper limit and which is the lower limit.
__________________
� � � � Tom Gutman

[ptc-1368288]

You are not putting that correct !

jmG

[Raiko]

On 9/10/2009 7:15:27 AM, jmG wrote:
>You are not putting that
>correct !
>
>jmG

Hi JMG,

thank you for that sheet. Now I understand

Raiko