erfc | Complementary error function | Architecture library

 by   math-io JavaScript Version: Current License: MIT

kandi X-RAY | erfc Summary

kandi X-RAY | erfc Summary

erfc is a JavaScript library typically used in Architecture applications. erfc has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can install using 'npm i math-erfc' or download it from GitHub, npm.

The [complementary error function][complementary-error-function] is defined as. . The [complementary error function][complementary-error-function] can also be expressed using Craig’s formula. .
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              erfc has a low active ecosystem.
              It has 14 star(s) with 0 fork(s). There are 1 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 0 open issues and 1 have been closed. On average issues are closed in 1 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of erfc is current.

            kandi-Quality Quality

              erfc has no bugs reported.

            kandi-Security Security

              erfc has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              erfc is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              erfc releases are not available. You will need to build from source code and install.
              Deployable package is available in npm.
              Installation instructions are not available. Examples and code snippets are available.

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            erfc Key Features

            No Key Features are available at this moment for erfc.

            erfc Examples and Code Snippets

            No Code Snippets are available at this moment for erfc.

            Community Discussions

            QUESTION

            how to calculate inverse erfc while unknown value and constants are involved
            Asked 2021-May-28 at 09:32

            I have this equation in java,

            double BER = (Erf.erfc(Math.sqrt(3 * CodedEb_No) * Math.sin(Math.PI/8)))/3;

            Erf.erfc is from org.apache.commons.math3.special.Erf

            I don't know what is CodedEb_No, but BER is 1E-7. How can I calculate CodedEb_No? I have a hint that I need to use erfcInv() from org.apache.commons.math3.special.Erf. But, since the rest of the values are also part of erfc function, I am bit confused on how to approach this. Can someone help me with this?

            ...

            ANSWER

            Answered 2021-May-28 at 09:32

            I think this is more of a maths than programming question after a very quick look and not testing, I guess you want to rearrange this function to make CodedEb_No the subject. I think that would be

            Source https://stackoverflow.com/questions/67735928

            QUESTION

            Scipy multivariate_normal cdf differs from the manual computing one
            Asked 2021-Mar-16 at 10:17

            I am computing value of normal distribution cdf in two ways:

            1. Using scipy library:
            ...

            ANSWER

            Answered 2021-Mar-16 at 10:17

            Cdf of the multivariate_normal takes a covariation matrix as a parameter, where dispersions (but not deviation) should be on the diagonal. So there is a correct way of using the cdf:

            Source https://stackoverflow.com/questions/66652215

            QUESTION

            Numerical Solution for Integral between -Inf and Inf: Error non-finite function value
            Asked 2020-Nov-05 at 11:17

            I have a function which I would like to integrate for x between -Inf and Inf. I'm using the function integrate in R. However, I do get an error saying Non-finite function value.

            ...

            ANSWER

            Answered 2020-Nov-05 at 11:17

            There are a couple of things to point out here. Firstly, your function needs to have as its first argument the variable over which you want to integrate, so you need to rewrite your function as:

            Source https://stackoverflow.com/questions/64695252

            QUESTION

            How do I calculate integral of exp(a*x**2+b*x+c)?
            Asked 2020-Oct-19 at 17:05

            So i want to calculate integral of exp(-ax^2-bx-c) assuming that a>0, b>0, c>0 using sympy.

            So i done this:

            ...

            ANSWER

            Answered 2020-Oct-19 at 17:05

            The sympy documentation is confusing about this. You are trying to use the "new" assumptions system which is still experimental and is not actually used internally by sympy. You need to use the core assumptions system in which assumptions are set when creating symbols:

            Source https://stackoverflow.com/questions/64426548

            QUESTION

            Parsing file with find gives strange results with different files
            Asked 2020-Jun-25 at 22:20

            I tried asking this question before and rightfully was informed I need to provide a fully working example so others can reproduce my result and then give guidance.

            Here is a shortened version of my code for parsing the file. The point of readFileToStrings is to save the file into seperate strings based on the patterns [Atoms], [GTO], and [MO].

            ...

            ANSWER

            Answered 2020-Jun-25 at 22:20

            There is an issue here:

            Source https://stackoverflow.com/questions/62583909

            QUESTION

            scipy curve_fit not fitting at all correctly even being supplied with good guess?
            Asked 2019-Nov-12 at 11:19

            I am trying to fit an exponentially modified gaussian function to some data. Data provided at top.

            I have the following code:

            ...

            ANSWER

            Answered 2019-Nov-11 at 16:31

            From the scatterplots, there appear to be two separate overlapping peaks in the data. Here is a graphical Python fitter using your data and fitting to the sum of two Gaussian peaks, with initial parameter estimates for curve_fit() supplied by scipy's Differential Evolution genetic algorithm module. That module uses the Latin Hypercube algorithm to ensure a thorough search of parameter space, requiring bounds within which to search. In this example those bounds are taken from the maximum an minimum data values, with 0.0 used as the lower bounds for parameters that I suspect should be positive only.

            Source https://stackoverflow.com/questions/58802378

            QUESTION

            FFT to find autocorrelation function
            Asked 2019-May-08 at 16:59

            I am trying to find the correlation function of the following stochastic process: where beta and D are constants and xi(t) is a Gaussian noise term.

            After simulating this process with the Euler method, I want to find the auto correlation function of this process. First of all, I have found an analytical solution for the correlation function and already used the definition of correlation function to simulate it and the two results were pretty close (please see the photo, the corresponding code is at the end of this post).

            (Figure 1)

            Now I want to use the Wiener-Khinchin theorem (using fft) to find the correlation function by taking the fft of the realizations, multiply it with its conjugate and then find take the ifft to get the correlation function. But obviously I am getting results that are way off the expected correlation function, so I am pretty sure there is something I misunderstood in the code to get this wrong results..

            Here is my code for the solution of the stochastic process (which I am sure it is right although my code might be sloppy) and my attempt to find the autocorrelaion with the fft:

            ...

            ANSWER

            Answered 2019-May-08 at 16:59

            There are two issues with the code that I can see.

            1. As francis said in a comment, you need to subtract the mean from your signal to get the autocorrelation to reach zero.

            2. You plot your autocorrelation function with a wrong x-axis values.

              v_data is defined with:

            Source https://stackoverflow.com/questions/56009451

            QUESTION

            ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1
            Asked 2019-Feb-12 at 05:15

            I am converting a C++ code to python code using SWIG on MAC OS. I used SWIG before but now I have some bug that I did not succeed to manage. So for using SWIG, I created a file RBergomi.i and applied the following commands

            swig -c++ -python RBergomi.i

            g++ -O2 -fPIC -c -std=c++11 RBergomi_wrap.cxx -I/Users/.../anaconda/include/python2.7

            g++ -std=c++11 -shared RBergomi_wrap.o -o RBergomi.so

            but I get this error

            "ld: symbol(s) not found for architecture x86_64

            clang: error: linker command failed with exit code 1 "

            I tried to look for the issue and it seems that the error is coming from using std::accumulate, which to use I need to call "numeric" header and then I have the issue. if I remove the header "numeric" I do not have the previous error anymore but accumulate is not known. Below the code of my RBergomi.cpp file

            ...

            ANSWER

            Answered 2019-Feb-12 at 05:15

            I solved the issue by using -lpython -dynamiclib to adress the linking issue so the code I used it is

            Source https://stackoverflow.com/questions/54633738

            QUESTION

            jq "strptime/1 is not implemented on this platform" when trying to use 'fromdate'
            Asked 2019-Jan-08 at 22:53

            i run jq v1.6 on Windows 10,

            my input is "2009-12-20 08:00:00" and i want to get the Day of Week.

            my test filter is ("2009-12-20 08:00:00" | sub(" "; "T") + "Z" | fromdate | gmtime) but all i get is an error:

            jq: error: strptime/1 not implemented on this platform

            Tried so many things, but nothing worked.

            builtins returns the relevant functions:

            ...

            ANSWER

            Answered 2019-Jan-08 at 22:53

            Here are two alternatives for solving the problem on a Windows 10 machine:

            Install Linux for Windows

            Then, once jq has been installed (e.g. using linuxbrew), you could use this filter:

            Source https://stackoverflow.com/questions/54100199

            QUESTION

            Does Rust 2018 support "if let" chaining?
            Asked 2018-Nov-11 at 23:07

            I'm parsing a vector of tokens, each of enum type. This means I get a lot of code like:

            ...

            ANSWER

            Answered 2018-Nov-10 at 14:35

            RFC #2497 has not been implemented yet. The GitHub issue you linked is only for describing how to deal with the ambiguity.

            To enable the second interpretation in the previous section a warning must be emitted in Rust 2015 informing the user that [...] will both become hard errors, in the first version of Rust where the 2018 edition is stable, without the let_chains features having been stabilized.

            So no, you cannot use the syntax yet, but instead use tuples as a workaround, as you already did.

            Source https://stackoverflow.com/questions/53235477

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

            Vulnerabilities

            No vulnerabilities reported

            Install erfc

            You can install using 'npm i math-erfc' or download it from GitHub, npm.

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