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Range picking of ethylbenzene is wrong

Open lpatiny opened this issue 4 years ago • 5 comments

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lpatiny avatar May 06 '21 14:05 lpatiny

At the moment we are not able to changes the default parameters of automatic-peak picking in nmrium, it is due probably to a big number of points. We need to think about a dynamic window size for GSD.

jobo322 avatar May 06 '21 14:05 jobo322

@jobo322 Could you test locally by hardcoding some parameters to check if it helps ?

lpatiny avatar May 06 '21 16:05 lpatiny

we need be able to modify the some parameter for the ranges detection tool, otherwise it will not works for all situation. e.g the signal of citrate has a j-coupling of aprox 16 Hz. but the next region has several signals that we should not join as a signal. So how we should handle this peaks grouping.

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jobo322 avatar May 07 '21 12:05 jobo322

I did increment the percent of intensity with respect to the top that a peak should reach to take it into the account. The new default value is 0.01 (10 %)

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jobo322 avatar May 12 '21 16:05 jobo322

Not sure what means this factor. Is it based on the top of a multiplet or the global ratio in the full spectrum.

What is sure is that an heptuplet is not exceptional. A isopropyl for example. The ratio is then 1 6 15 20 15 6 1. Even a isobutyl would give the a nonaplet. So 10% does not seems like a good default value.

Concerning the following molecule the system finds 2 doublets instead of a doublet of doublet as well.

We need to add options for the automatic peak picking.

With ethyl vinyl ether it is quite wrong

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lpatiny avatar May 13 '21 19:05 lpatiny