hyperspy/hyperspy

Multidimensional data analysis

Mingquan Xu

@Mingquan_Xu_twitter

Could you give me a hint for this?

Mingquan Xu

@Mingquan_Xu_twitter

I have used the above method to do this, but not sure whether there is a better way?

Tan-Shengdong

@Tan-Shengdong

Hi all, when I used Hyperspy to deal with EDS data, I noted that there is some shift of the same peak (such as Pt_La) among different data.

I have used add_elements(), add_line() and calibrate_xray_lines()

Thomas Aarholt

@thomasaarholt

@Tan-Shengdong is there a question there? :)

@Mingquan_Xu_twitter Could you explain a bit further what you want? "map out Signal (Dynamic)" wasn't very clear.

Tan-Shengdong

@Tan-Shengdong

@thomasaarholt I just want to ask why there is a shift？ I think the x-ray position of each element should be a constant.

Thomas Aarholt

@thomasaarholt

Oh, I see. I'm not sure of the physical reason either, but I've definitely heard of shifts before - it's why the calibration functions exist.

Zanetta Pierre-marie

@ZanettaPM

@Tan-Shengdong I think that is because you use calibrate_xray_lines() it tunes the parameter of the Gaussian and among them the center position. I you just wants to change the energy resolution use calibrate_energy_resolution()

adriente

@adriente

Hello,

I am using VSCode as an IDE. I use the jupyter plugin that enables jupyter notebooks to be used in the interface of VSCode. Everything was working well until recently. Now when I have a cell with :

import hyperspy.api as hs

The kernel dies. It is working well with import hyperspy though. Is that a known issue ? Is anybody else using VSCode and the hyperspy api ?

Thomas Aarholt

@thomasaarholt

Interesting! I can give it a shot later this weekend. Any idea how recently it was working?

18 replies

Abohaitham92

@Abohaitham92

Hello all, I have a question regarding loading an .edm file and then saving it to hdf5 file, i just loaded an edm file using s = hs.load(edm_file), which gave me a list of signals, what is the best way to save all of these signals into one hdf5 file ? I used to save one signal using s.save(test.hdf5). But now using the save command for each signal in my list on the same file will overwrite the file.

1 reply

lnaglecocco

@lnaglecocco

Hi, I think someone explained this to me before but I don't remember the explanation and can't find it - sorry. When I plot a model with plot_components=True, some of the components have features which shouldn't be part of the component. For example the red peak here is a GaussianHF yet it has features around 800 eV which contribute to the overall fit. What is that all about?

2 replies

lnaglecocco

@lnaglecocco

Another unrelated question, and thank you in advance. I have a dataset for which fitting a model can be quite time-consuming. So rather than re-fitting every time I load it up and want to look at it, I'd like to save it and simply load the file. However - when I try code like ".model.save("model",extension="hspy")", and then "model_2 = hs.load("model.hspy")", model_2 doesn't seem to have the model, just the experimental data. How can I save a model?

2 replies

DENSmerijn

@DENSmerijn

Hi all, we are trying to load a Velox .mrc file but we keep getting the following error: ValueError: cannot convert float NaN to integer
We have tried multiple files, all with the same outcome. Any idea what could be causing this issue?

7 replies

Mingquan Xu

@Mingquan_Xu_twitter

If I want to fit a fractional energy-range in my spectrum, how can I use the m.fit() function?

Like only fit the energy range marked in orange above

2 replies

Mingquan Xu

@Mingquan_Xu_twitter

3 replies

Hi, all, if I want to get the data-points of my model-fitting, the green line, how to do it? Because I want use those data-points to plot it individually.

Mingquan Xu

@Mingquan_Xu_twitter

Hi, all, recnetly I am trying Matlab to treat my spectrum image data, but I donot know how to expot the data after processing. Are there any matlab scripts can write the spectrum image data? such as to .mrc ?

lnaglecocco

@lnaglecocco

Hi, is there a way to exclude certain pixels (with each pixel containing a spectrum) from a model before fitting? I've written an algorithm which produces an array of coordinates representing pixels which are not part of my sample, but I'm not sure how to make that happen. I know I can use .inav[x1:x2,y1:y2] but my sample is not a perfect square so just cropping isn't quite what I want to do

8 replies

lnaglecocco

@lnaglecocco

I have another question which probably has a very simple fix. When I do model.plot() the spectrum at each pixel is normalised such that the plot fits perfectly. However, when I set plot_components=True, I get it so that only part of the data fits in the y axis. I've figured out that this is because it's setting the y-axis bounds for the graph based on a single component, rather than the total fit. How can I fix this so that model.plot(plot_components=True) gives each pixel normalised to the total fit rather than the y-span of a single component?

2 replies

OliDG

@OliDG

Hi,
I try to find a way to save my "file.hspy" using the save() function to a specific path, but I can't see a "path" argument in the function description. Ideally, I was hoping to get the path from the hs.load() function ("load.path/of/my/loadedfile") and use it to save to the same folder without having to manually enter a path ( I have many datasets from many different folders).

20 replies

Jędrzej Morzy

@JMorzy

Is there a way of adapting 'fit_component' function to work using multiple threads on a CPU? The only mention of parallel processes that I found in the docs was in SAMFire and in the map function. I have a relatively specific order of component fits (for EELS core-loss data) that I wouldn't want to change. Any advice on how to approach this would be appreciated!

(I just recently got my hands on a computer, where parallelising would save a significant amount of time)

2 replies

Rosenkranz1

@Rosenkranz1

Hello. I am fairly new to programming, and i am trying to write some extensions to the HyperSpy program. I know how to write a class and have the class inherit etc, but when i create a class for a HyperSpy extension, which should basically inherit the "whole" of HyperSpy so i can use the methodes in HyperSpy in my extension, what is the best approach for this?
I should fork the github repo, but for me it is not very intuitive, what the best way to write extensions are.
I have read the documentation on this, from HyperSpys websites, but i need some elaboration.
Any advice is highly appriciated!

6 replies

Rosenkranz1

@Rosenkranz1

Hello, i have a followup question for my question above.

I want to contribute to a package that already excist (The eds packages). How would i go about using my contribution? By forking the repo and including my methodes in the relevant classes or should i create my own class, and have that inherit from eds? In the latter case, i am struggeling to get the inheritance to work properly, i have written some code, but when i try to apply my method too a dataset it exclaim that EDSSpectrum does not have the attribute, should correct inheritance not fix this? Or is the only way to create my code in a forked repo of the relevant signal?
This might be a trivial question but i cant seem to find the answer. (Maybe i lack some understandig of classes)

6 replies

Weixin Song

@winston-song

Hi All, I use DM to record some EDX spectral images, when I process them using PCA, it shows 'ValueError: zero-size array to reduction operation minimum which has no identity' whether anyone knows how to resolve this problem? thanks

Weixin Song

@winston-song

Eric R. Hoglund

@erh3cq

Are there any EXELFS functions or plugins for HyperSpy?

Francisco de la Peña

@francisco-dlp

Is it an EDX model? The issue may be that more elements require more memory—are you saturating your memory by any chance?

1 reply

Markus Wollgarten

@w-markus

Dear all, a rather simple question: when loading dm3 files of diffraction data the metadata only contains the 'General' branch. Is there a signal type one should request upon loading, that more metadata fields are available even if not filled yet? Thanks a lot! Markus

5 replies

Mingquan Xu

@Mingquan_Xu_twitter

1 reply

A simple question: how to improve this fitting.
I used a "g1 = hs.model.components1D.Gaussian()" to do this fit and want to get the center of this peak.

Jonas Lähnemann

@jlaehne

PostDoc offer combining TEM and MBE of (Al,Sc)N nanowires: http://www.pdi-berlin.de/jobs/job-offers/postdoc-fmd-for-epitaxy-and-atomic-scale-characterization-of-alscn-nanowires/

kociak

@kociak

Dear all. I have an annoying issue with installing hyperspy for use in an environment having the last version of nionswift. The conflict comes from the fact that hs requires numba, and numba requires numpy <=1.20 (hs installs 1.20.3). But nionswift requires numpy 1.21.4 (I guess for the Typing functionalities). My question: can we switch off the use of numba in hyperspy? thanks guys

7 replies

kociak

@kociak

@thomasaarholt: lean and fit. i'll take a look at that and tell you if that works (hopefully I won't get stuck by another hidden compatibility issue :)

Javalde91

@Javalde91

Well, this does the job:

s.plot()
roi = hs.roi.RectangularROI(0.0, 0.0, 0.00001, 0.00001)
roi_signal = roi.interactive(s)

Hello Thomas and everyone, I'm trying to apply a CirleROI but I would like it to have it interactive way, is it possible to do it? Thanks

4 replies

Amina Saleh

@Amina_saleh_twitter

Hi, I used to get my spectrum images in color. Now, when I downloaded another version on another laptop, I only get grayscale rather than colorscale. How can I retrieve the color scale back?

1 reply

Joshua F Einsle

@jeinsle

I am trying to layout some results figures for collaborators and trying to be slightly more efficent than my normal save a plot and layout in powerpoint I decided to try set this up in hyperspy. What I would like to get is figure which looks like this example in the 'Visualisation' section of the Hyperspy website.
alt

however when I run my version of that cell I end up with two seperate figures, instead of a single figure with two subfigures like what is seen above. While I know how to do this with matplotlib, I was wanting to leverage the built in hyperspy tools so the metadata/ axis manger information is automatically applied, as opposed to having to do the heavy lifting again. Any insights would be appricaiated.

3 replies

Mohsen

@M0hsend

Hi All, I am trying to open .hspy files written with RELEASE_next_minor branch with the released 1.6.5 version and I get the following error: TypeError: __init__() got an unexpected keyword argument '_type'. Any ideas how to fix / work-around?

2 replies

Mohsen

@M0hsend

Hi All, I am trying to open .hspy files written with RELEASE_next_minor branch with the released 1.6.5 version and I get the following error: TypeError: __init__() got an unexpected keyword argument '_type'. Any ideas how to fix / work-around?

Never mind. Just reading with h5py and populating axes metadata works good enough. Thanks!

Javalde91

@Javalde91

Hello everyone! I'm trying to get the total electron counts from my SI. I usually do it on DM, but I can't get it on hyperspy, I use s.sum(), but the number that I get is "(|2036)>" from the dimension of my SI ("<EELSSpectrum, title: C_CL_0, dimensions: (80, 80|2036)>" What I'm trying to do is to get the total e- counts to normalize my SI and compare them.

Thomas Aarholt

@thomasaarholt

s.T.sum() :)

Thomas Aarholt

@thomasaarholt

(.T swaps around the navigation and signal dimensions)

OliDG

@OliDG

@thomasaarholt Hi,
I try to get quantified EDS from a sample with many elements (Al,C,Co,Cu,Cr,Mo,O,Pt,W,Zn) with a strong peak overlap between Cr-L (0.571 eV) and O-K (0.523 eV).
One layer is expected to be CrC but appears as CrO... the quantification output 30% of O in it, which is very unexpected for several reasons. Checking the EDS spectrum manually I can see the peak shift by maybe 1 channel when seeing Cr-L instead of O-K but the model fitting doesn't.
I am using the EDS model fitting and after several hours in the documentation I come here to ask: Is there a solution to this? is there a function somewhere that can for instance estimate Cr-L from the Cr-K intensity and subtract it from the O-K signal before saving the O-K intensity? I hope this question is clear enough!

Regards,
Olivier

18 replies

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