add option for sorting profile data by x-axis values before plotting

[Agustin Lobo]

How can it go backards ~1000 nm ?

[Andreas Janz]

That is just the detector overlap between VNIR and SWIR.

[Andreas Janz]

Same behaviour as in ENVI Classic:

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[Agustin Lobo]

Not in HypPy (https://blog.utwente.nl/bakker/hyppy/), this is just a matter of sorting in terms of wavelength, which is

the variable chosen for the x axis.

The plot is correct in enmapbox if bands is selected for the x axes.

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[Andreas Janz]

Sure, we could decide to sort profile data points according to the wavelength before plotting.

Having said that, I wouldn’t recommend to do that unasked, because it can slow down plotting of larger libraries (and it somehow alters the data).

@Benjamin Jakimow shall we have a checkbox “Sort by x values” in the plotting options?

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[Agustin Lobo]

Having said that, I wouldn’t recommend to do that unasked, because it can slow down plotting of larger libraries

I cannot argue there. Another alternative is just displaying points, avoiding the link of one point to the next one with a segment (after all, there is no reason for linking points in the spectrum with segments: the data are only at the points).

.(and it somehow alters the data)

That it is not true: I just refer to the plot display, not to actually modifying the data on disk. Data must be displayed by the order of the

magnitude displayed on the X axis.

marked as enhancement

You can name it as you wish, but the current plots in with the spectrum does not follow the order of the variable selected for the X axis, is wrong. A different thing would be that the user would optionally select another variable (i.e., band order) for sorting (as he/she would do for coloring, a good example would be a trajectory: an spatial pattern of points in X,Y plane linked by segments according to time), but this would need to be specifically declared.

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[Andreas Janz]

I cannot argue there. Another alternative is just displaying points, avoiding the link of one point to the next one with a segment (after all, there is no reason for linking points in the spectrum with segments: the data are only at the points)

It is possible to just plot the points. You can change the line style here:

@Benjamin Jakimow I would say that the location of the line style setting for temporally linked profiles is a bit counter intuitive. Why is it under the visualization settings of the SpectralView? It should be right next to the temporally linked profiles color setting, right?

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[Andreas Janz]

That it is not true: I just refer to the plot display, not to actually modifying the data on disk. Data must be displayed by the order of the

magnitude displayed on the X axis.

Alright, true, data is not really altered.

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You can name it as you wish, but the current plots in with the spectrum does not follow the order of the variable selected for the X axis, is wrong. A different thing would be that the user would optionally select another variable (i.e., band order) for sorting (as he/she would do for coloring, a good example would be a trajectory: an spatial pattern of points in X,Y plane linked by segments according to time), but this would need to be specifically declared.

I created a fresh follow-up issue here: https://bitbucket.org/hu-geomatics/enmap-box/issues/906/add-an-sort-by-x-values-checkbox-to-enable

[Agustin Lobo]

@Benjamin Jakimow

I would say that the location of the line style setting for temporally linked profiles is a bit counter intuitive. Why is it under the visualization settings of the SpectralView? It should be right next to the temporally linked profiles color setting, right?

I agree switching from line to points should be in a more straightforward button