[Octave-bug-tracker] [bug #37328] errorbar incorrectly connects points

[Aqeel Akber]

Follow-up Comment #4, bug #37328 (project octave):

Hi Rik, thanks for your participation. 

I should clarify that all the plots attached were made with the same script.
Using your first test case provides no difference.

(3.2.4): The errorbar bug in 3.2.4 after downgrading is identical to that of
bug #30998 and Simon's proposed fix works. It is a ugly hack but works well.
I'm not sure why the behaviour changed with the same package from the debian
repo's. 

(3.6.3): 
Using the code

errorbar (x,y1,1,"~x", x,y2, 0.5,"~^", x,y3,2,"~*")


Works as intended with gnuplot 4.6.0.
Sorry, it's just a change in syntax I did not pick up which changed in
versions. This bug can be considered closed.

I must say though, the implementation of errorbar in 3.6.3 is poorer than in
3.2.4.
If I may add some suggestions here? As I am a very heavy user of Octave. (I
also have found another problem)
Firstly, it is important to understand Error bar plots ordinarily don't have
lines connecting the points.

1. Do not have errorbar lines connected by default instead make it an option.
2. In 3.2.4 the marker style of the error bar changes for multiple plots by
default. This is great. 
3. (PROBLEM WITH 3.6.3): When a legend is created in 3.6.3 of error bar plots
it does not show the marker style. If the plot is printed in monochrome it
will be impossible to differentiate the plots. In 3.2.4 there is not this
issue. I have attached two images as png files showing the difference.

In fact, after applying fix to the bug #30998 of 3.2.4's errorbar function it
is perfect and 3.6.3's should be identical to this.



(file #26538, file #26539)
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Additional Item Attachment:

File name: errorbar324.png                Size:20 KB
File name: errorbar363.png                Size:20 KB


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