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+--- Thread: Red line on the pressure graph (/Thread-Red-line-on-the-pressure-graph)
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Red line on the pressure graph - Greywolfe - 09-08-2022
Does any of the more experienced people on this site have any idea has to why there this red line on the pressure graph?
[attachment=44447]
RE: Red line on the pressure graph - DaveCar - 09-08-2022
Your inhale and exhale pressures are the same (not using EPR), so the values match.
The graph interpreted them a hair differently in that spot.
Thats my guess anyhow.
RE: Red line on the pressure graph - pholynyk - 09-08-2022
You have EPR turned off, so the EPAP and IPAP have the same value - except for that brief time when the calculations don't round to exactly the same value - so both the green and red lines show up almost on top of each other.
My browser gave me a magnifying glass for a cursor, so I clicked and both lines showed up clearly
I suppose it is arguable whether the pressures were different or the just the settings a bit off.
RE: Red line on the pressure graph - Greywolfe - 09-08-2022
(09-08-2022, 05:28 PM)pholynyk Wrote: You have EPR turned off, so the EPAP and IPAP have the same value - except for that brief time when the calculations don't round to exactly the same value - so both the green and red lines show up almost on top of each other.So, are you saying that there is a ”glitch” or a bug in the OSCAR software?
My browser gave me a magnifying glass for a cursor, so I clicked and both lines showed up clearly
I suppose it is arguable whether the pressures were different or the just the settings a bit off.
RE: Red line on the pressure graph - Jeff8356 - 09-08-2022
(09-08-2022, 06:16 PM)Greywolfe Wrote: So, are you saying that there is a ”glitch” or a bug in the OSCAR software?
It's an undocumented feature!
RE: Red line on the pressure graph - Greywolfe - 09-08-2022
(09-08-2022, 05:28 PM)pholynyk Wrote: You have EPR turned off, so the EPAP and IPAP have the same value - except for that brief time when the calculations don't round to exactly the same value - so both the green and red lines show up almost on top of each other.
My browser gave me a magnifying glass for a cursor, so I clicked and both lines showed up clearly
I suppose it is arguable whether the pressures were different or the just the settings a bit off.
Exactly what do hyou mean by an "undocumented feature?"
RE: Red line on the pressure graph - Crimson Nape - 09-08-2022
That's nerd talk for an unexpected result (i.e. a Bug!).
RE: Red line on the pressure graph - Greywolfe - 09-08-2022
(09-08-2022, 06:29 PM)Crimson Nape Wrote: That's nerd talk for an unexpected result (i.e. a Bug!).
Apparently this needs to be brought to the attention of the OSCAR development team, if this is indeed a bug in the OSCAR software
RE: Red line on the pressure graph - Crimson Nape - 09-08-2022
What you describe is not so much of an OSCAR bug, but an issue with the data and the computer's operating system. The graphs are normally drawn in memory before displaying them, so you don't see this. Each line is drawn separately, and the first line may be overwritten by the second one in certain areas.
RE: Red line on the pressure graph - pholynyk - 09-08-2022
>>>or the just the settings a bit off.
>>>>or just the settings a bit off.the
This graph is displaying the 'set value' calculated by the machine for the two variables. They are stored as 16 bit values in the SD card files. A difference of one low order bit could be the difference in the two lines.