Mailman 3 March 2017 - SciPy-Dev

Owen's T function
by Evgeny Zhurko March 3, 2017

March 3, 2017

Hi all, I started implementing Owen's T function( https://github.com/scipy/scipy/pull/7120). I have implemented Omen's T1, T2, T4,T6 from "Fast and accurate calculation of Owen's T Function ( https://www.jstatsoft.org/article/view/v005i05/t.pdf) already(not pushed yet). I have problem with T3 and T5. I can't evaluate C2i - obtained from the coefficients of Chebyshes polynomials in T3 and can't evaluate Wi - wieghts and Xi - values of abcissas. As i see in Boost library, they doesn't evaluate C2i, Wi, Xi(constants in source). Maybe someone know how i can evaluate it using scipy or numpy? Best Regards, Evgeny Zhurko

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GSoC'17 candidate - Interested in Nose to Pytest Migration.
by Karan Desai March 2, 2017

March 2, 2017

Hello developers, I am Karan Desai, a third year undergraduate from Indian Institute of technology, Roorkee. I went through the GSoC Ideas page on Scipy github wiki, and I think that I'll be most comfortable with the idea "Make the SciPy test suite work with pytest". I believe that I match the required prerequisites, and I'll present some facts to support my belief. 1. I have completed my GSoC'16 with TARDIS. Their integration tests took more than a day to execute, hence Travis was not fit for that. I developed an Integration Testing Framework inpytest to schedule their execution on a local server when a commit occurs on Github. Also, it generated an automated HTML Report with comparison plots between various astronomical quantities in order to debug failed tests. 2. I have contributed to joblib, a multiprocessing library in Python. I have helped with the migration of joblib testing framework from nose to pytest. Including review cycles, it took about 25 days to do so. Scipy and numpy will be bigger than that. With sufficient knowledge of how pytest flavored tests are designed, and some important differences between nose and pytest styles, I think I'll be very much comfortable with this project.I saw recent mail threads in the archive and I was happily surprised to see a few familiar names, Gael Varoquaux and Olivier Grisel might have remembered my contributions in Joblib back in December… Relevant Links: 1. Github Profile:https://www.github.com/karandesai-96/ 2. Issues and Pull Request thread about Pytest Migration: https://www.github.com/joblib/joblib/issues/411 3. GSoC 2016 project: https://summerofcode.withgoogle.com/archive/2016/projects/4796129849901056/ I will be happy to hear from the community. Thanks. Karan Desai,Department of Electrical Engineering, IIT Roorkee.

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Interested in contributing BILP solver and interior-point method for linprog; SciPy-dev search down?
by Matt Haberland March 2, 2017

March 2, 2017

Hi all, I'm new to the list. 1. I am interested in contributing a binary integer linear programming solver now, and possibly a more general MILP solver in the future. Existing solutions (lp_solve, cvxopt, PuLp w/ GLPK) are not as easy to use as they should be, at least for Windows users. As I was writing the BILP code, I found a bug in linprog in which it would report success, yet the bounds were not at all respected by the returned solution. I will report that bug, but in the meantime I started writing an interior-point linear programming solver, which I'd be interested in contributing as well. Please let me know if you'd be interested in me contributing: * A binary integer linear programming solver similar to Matlab's old bintprog, but with options for both Balas' method and bintprog's branch and bound algorithm * A primal-dual interior-point method for linprog 2. I was trying to search the archives to see if there is already discussion about integer programming or additional methods for linprog, but it seems that the server: http://dir.gmane.org/ isn't working? I checked: http://www.isitdownrightnow.com/dir.gmane.org.html and it's down for everyone. I just thought I should report that. Thanks! Matt -- Matt Haberland Assistant Adjunct Professor in the Program in Computing Department of Mathematics 7620E Math Sciences Building, UCLA

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GSoC 2017 Project- scipy.diff(numerical differentiation)
by Aditya Singh March 1, 2017

March 1, 2017

Hello Developers! I am a GSoC enthusiast! any tips on how to begin? I am particularly interested in the project - " Implement scipy.diff(numerical differentiation) " Also this is the first time I am contributing to SciPy, so I need some help getting started!

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GSoC17 - Question about candidacy
by Євгеній Гизила March 1, 2017

March 1, 2017

Dear developers I'm Yevhenii Hyzyla and I'm an undergraduate student from Taras Shevchenko National University of Kyiv in Ukraine. I don't have any experience of open source contributing, but I want to start this way from SciPy. I have good knowledge of Python (some small pet project) and C on sufficient level (university course). Also, I have an experience of working with SciPy library and SciPy stack in general. After seeing the wiki page with ideas and I think I could develop scipy.diff, because I have good knowledge about differential and how to calculate them using numerical or symbolic methods. (I had courses at university from Mathematical analysis and Numerical analysis). And my hobbies are Math and Python. 1) If I make some patches to scipy, what chance of being accepted will be? 2) How many students applies to scipy each year? Could I get feedback about my candidacy from developers? Thank for reading! Yevhenii

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