spectra | A header-only C++ library for large scale eigenvalue

 by   yixuan C++ Version: v1.0.1 License: MPL-2.0

kandi X-RAY | spectra Summary

kandi X-RAY | spectra Summary

spectra is a C++ library. spectra has no bugs, it has a Weak Copyleft License and it has low support. However spectra has 1 vulnerabilities. You can download it from GitHub.

NOTE: If you are interested in the future development of Spectra, please join this thread to share your comments and suggestions. NOTE: Spectra is moving to the 1.0.0 release, with a lot of API-breaking changes. Please see the migration guide for a smooth transition to the new version. Spectra stands for Sparse Eigenvalue Computation Toolkit as a Redesigned ARPACK. It is a C++ library for large scale eigenvalue problems, built on top of Eigen, an open source linear algebra library. Spectra is implemented as a header-only C++ library, whose only dependency, Eigen, is also header-only. Hence Spectra can be easily embedded in C++ projects that require calculating eigenvalues of large matrices.
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            kandi-support Support

              spectra has a low active ecosystem.
              It has 643 star(s) with 117 fork(s). There are 36 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 36 open issues and 83 have been closed. On average issues are closed in 282 days. There are 5 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of spectra is v1.0.1

            kandi-Quality Quality

              spectra has 0 bugs and 0 code smells.

            kandi-Security Security

              spectra has 1 vulnerability issues reported (0 critical, 1 high, 0 medium, 0 low).
              spectra code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              spectra is licensed under the MPL-2.0 License. This license is Weak Copyleft.
              Weak Copyleft licenses have some restrictions, but you can use them in commercial projects.

            kandi-Reuse Reuse

              spectra releases are available to install and integrate.
              Installation instructions, examples and code snippets are available.

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            spectra Key Features

            No Key Features are available at this moment for spectra.

            spectra Examples and Code Snippets

            No Code Snippets are available at this moment for spectra.

            Community Discussions

            QUESTION

            How to convert a Spark rdd containing np.array (or list) to a Spark DataFrame?
            Asked 2022-Apr-05 at 10:27

            How to convert a Spark rdd containing np.array (or list) to a Spark DataFrame?

            ...

            ANSWER

            Answered 2022-Apr-03 at 16:08

            Issues with such an approach, an alternative and use Double, some ballast at end:

            Source https://stackoverflow.com/questions/71726746

            QUESTION

            Check if character within string; pass if True, do stuff if False
            Asked 2022-Mar-27 at 14:26

            I am writing code to process a list of URL's, however some of the URL's have issues and I need to pass them in my for loop. I've tried this:

            ...

            ANSWER

            Answered 2022-Mar-27 at 14:26

            There's no need to compare the result of re.search with True. From documentation you can see that search returns a match object when a match is found:

            Scan through string looking for the first location where the regular expression pattern produces a match, and return a corresponding match object. Return None if no position in the string matches the pattern; note that this is different from finding a zero-length match at some point in the string.

            So, when comparing a match object with True the return is False and your else condition is executed.

            Source https://stackoverflow.com/questions/71636698

            QUESTION

            How to read excel with starting filename using openpyxl
            Asked 2022-Mar-25 at 18:44

            I have to read excel file with starting file name. So I use glob which return me the file path with file name in list. Now I want to pass the file path to Openpyxl so I can read excel. How can I do that?

            ...

            ANSWER

            Answered 2022-Mar-25 at 18:44

            The load_workbook() function will accept a WindowsPath as an arugment.

            Try something like this:

            Source https://stackoverflow.com/questions/71621660

            QUESTION

            Splitting csv into multiple files with header using awk
            Asked 2022-Mar-17 at 08:32

            I am attempting to split a csv file based on unique column values into multiple files using awk. I am able to split the csv successfully with awk -F\, '{print > $2".csv"}' example.csv however it is committing the header column from the new files.

            For example:

            ...

            ANSWER

            Answered 2022-Mar-17 at 08:32

            You are almost there. Would you please try:

            Source https://stackoverflow.com/questions/71506534

            QUESTION

            Calling a func from a Python file
            Asked 2022-Mar-08 at 19:54

            I have two Python files (using PyCharm). In Python file#2, I want to call a function in Python file#1.

            ...

            ANSWER

            Answered 2022-Mar-08 at 16:27

            You can wrap up the functions of file 1 in a class and in file 2 you can create object and can call the specific function. However if you can share the file 1's code then it would be clear. For your reference find below...

            File-1

            Source https://stackoverflow.com/questions/71397897

            QUESTION

            Interpolate: spectra (wavelength, counts) at a given temperature, to create grid of temperature and counts
            Asked 2022-Mar-08 at 15:47

            I have a number of spectra: wavelength/counts at a given temperature. The wavelength range is the same for each spectrum.

            I would like to interpolate between the temperature and counts to create a large grid of spectra (temperature and counts (at a given wavelength range).

            The code below is my current progress. When I try to get a spectrum for a given temperature I only get one value of counts when I need a range of counts representing the spectrum (I already know the wavelengths).

            I think I am confused about arrays and interpolation. What am I doing wrong?

            ...

            ANSWER

            Answered 2022-Mar-08 at 15:47

            I think what you want to achieve can be done with interp2d:

            Source https://stackoverflow.com/questions/71395048

            QUESTION

            an issue with openfile function in python
            Asked 2022-Feb-15 at 02:11

            I wrote a function to open a txt file and returns me three numpy array. However, I get this error all the time, which I do not have any idea why?

            ...

            ANSWER

            Answered 2022-Feb-15 at 02:08

            The error you are referring is when you call the function load_data_from_file().It seems that you are not passing the filename correctly in the parameters. The correct way to call it should be something like:

            Source https://stackoverflow.com/questions/71115676

            QUESTION

            How to install specific github repo branch?
            Asked 2021-Nov-18 at 19:51

            I am trying to install a very recent branch of a github repo into my google colab editor. I guess I haven't yet figured out the correct syntax, despite trying out different suggestions on StackOverflow. What I have tried so far is

            ...

            ANSWER

            Answered 2021-Nov-18 at 14:17

            Try this, it worked in my colab:

            Source https://stackoverflow.com/questions/70021135

            QUESTION

            Troubles predicting fixed effects from a hierarchical GAM in mgcv
            Asked 2021-Jul-20 at 19:20

            I have been fitting different hierarchical GAMs (hereafter: HGAM) using mgcv in R. I can extract and plot their predictions for their random effects without problems. Conversely, extracting and plotting their predictions for their fixed effects only works for some models, and I don't know why.

            Here is a practical example, which refers to the color spectra of flowers from two species (Taxon) sampled at various localities (also discussed here):

            ...

            ANSWER

            Answered 2021-Jul-20 at 11:14

            I think you are conflating several things here; The by trick to turn off random effects only works for bs = "re" smooths. Locality is a factor (otherwise your random effect isn't a random intercept) and setting it to 0 is creating a new level (although it could be creating an NA as 0 isn't among the original levels.

            If what you want to do is turn off anything to do with Locality, you should use exclude; however you have the invocation wrong. The reason why it's not working is because you are creating a character vector with a single element "c(Locality)". This fails for obvious reasons once you realize that c(Locality) doesn't related to anything in your model. What you need to provide here is a vector of smooth names as printed by summary(). For example, to exclude the smooth s(Locality, bs = "re"), {mgcv} knows this as s(Locality), so you would use exclude = "s(Locality)".

            In your case, it is tedious to type out all the "s(wl):LocalityLevelX" labels for each smooth. As you have only two taxa, it would be easier to use the complimentary argument terms, where you list smooth labels that you want to include in the model. So you could do terms = c("s(wl):TaxonSpeciesB", "s(wl):TaxonSpeciesC") or whatever summary() displays for these smooths.

            You also need to include the Taxon term in terms, which I think needs to be:

            Source https://stackoverflow.com/questions/68438028

            QUESTION

            How to merge files in a directory with r?
            Asked 2021-Jul-15 at 17:49

            Good afternoon,

            have a folder with 231 .csv files and I would like to merge them in R. Each file is one spectrum with 2 columns (Wavenumber and Reflectance), but as they come from the spectrometer they don't have colnames. So they look like this when I import them:

            ...

            ANSWER

            Answered 2021-Jul-15 at 16:05

            no need for a loop here simply use lapply.

            first set your working directory to file location###

            Source https://stackoverflow.com/questions/68397122

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install spectra

            An optional CMake installation is supported, if you have CMake with at least v3.10 installed. You can install the headers using the following commands:. By installing Spectra in this way, you also create a CMake target 'Spectra::Spectra' that can be used in subsequent build procedures for other programs.

            Support

            The API reference page contains the documentation of Spectra generated by Doxygen, including all the background knowledge, example code and class APIs. More information can be found in the project page https://spectralib.org.
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