Scilab Presentation for Tech Talk Tuesday 21 July 2015
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The document provides an introduction and overview of Scilab software. Some key points: - Scilab is an open-source software for engineering and scientific computations, developed by Scilab Enterprises. - TBSS became a business partner for Scilab in Singapore and Vietnam in 2013-2014 to oversee Scilab activities like training, projects, and user groups. - The Scilab Challenge project promotes the use of Scilab in academic institutions by having students work on projects using Scilab tools and potentially present their findings at an international conference.
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Scilab Presentation for Tech Talk Tuesday 21 July 2015
- 1. LEE Kar Heng, Ph.D Chief, TBSS Group SCILAB IN VIETNAM An Introduction to Scilab for Tech Talk Tuesday, Ho Chi Minh City
- 2. 2 SCILAB ENTERPRISES • Founded in June 2010 • The official publisher and professional services provider of Scilab software • Provides expertise in the implementation of optimal solutions in terms of technological innovation and helping companies to make the right decisions in computation and simulation tools • Our team is comprised of engineers and doctors of science from higher education schools or universities, graduated in mathematics, automation, telecommunications, physics or computer science • http://www.scilab-enterprises.com/
- 3. 3 THE TBSS-SCILAB PARTNERSHIP • TBSS became the business partner for Singapore and Vietnam of Scilab in 2013. • In 2014, TBSS-Scilab Singapore was incorporated to handle the Scilab business in Singapore. • In Vietnam, the business is represented by TBSS Khai Kinh Company Limited. • http://www.scilab- enterprises.com/partners/ourpartners
- 4. 4 THE TBSS-SCILAB PARTNERSHIP • Oversees and Manages Scilab activities in – Training and Education – Project and Consultancy – Migration and Deployment – Specialized Developments – Scilab User Group Management, Operations and Support • Manages, administers and funds the Singapore and Vietnam Scilab User Groups • Manages Scilab projects in Singapore and Vietnam
- 5. 5 THE SCILAB CHALLENGE PROJECT • Scilab Challenge 2014/2015 requires students to work on a project that uses Scilab as the main scientific tool in the simulation and computation of the solution to the problem they are investigating • Top 3 projects will be presented with cash prize, certificate and medal • All participants will be presented certificate and medal • Identified projects will be required to submit a technical paper to the ScilabTEC2015 Committee • The selected project team member will be sponsored to present the findings at the ScilabTEC Conference in Paris • In May 2015, one project was presented at ScilabTEC
- 6. 6 PROJECT OBJECTIVES • To promote use of Scilab in academic institutions, currently Scilab-Singapore have challenge projects with NTU and TP • To facilitate the use of Scilab to solve a specific problem • To enable the students appreciate Scilab • To provide a channel for students to present findings in the ScilabTEC conference, Paris • To reward capable students accordingly
- 7. BENEFITS • Scilab is an open-source software, hence there is NO licensing issue • Gain skillset in use of Scilab • Participation in project gives advantage in seeking employment • Participation in international conference is widely accepted as a professional recognition • Possibility to work for Scilab Enterprise, TBSS- Scilab or other Scilab partners 7
- 8. 8 • The conference was held from 20 to 21 May in Paris • TBSS was represented by Dr Lee and Miss Li Kexin • Le would be presenting the project “Taxi on the Way” • Lee would be meeting the management staff of Scilab and confirming the representation of new products in Singapore and/or Vietnam
- 9. 9 • The presented topics covered a wide range of specialized areas • The TBSS team learned how Scilab has been used by other professionals • It was a great program with knowledge sharing and networking
- 10. 10 • Lee with Jocelyn, the Marketing Director who is the first contact of Lee in Scilab • Jocelyn had facilitated the partnership between TBSS and Scilab
- 11. 11 • Lee visited Scilab in Jan 2014 and got acquaintance with Dr Gomez and Ms Julie • Dr Gomez is the Advisor and immediate past CEO of Scilab • Ms Julie is the Communications and Public Relations Manager of Scilab
- 12. 12 • Mr Aphan took over Scilab recently • Lee had a good meeting with Mr Aphan on the progression of the partnership in terms of training, 3rd party products and Scilab Academy in Asia.
- 13. 13 • Kexin presented the project with good presentation slides and confident.
- 14. 14 • TBSS practices Corporate Social Responsibility • Scilab Challenge is an initiative that allows outreach of Scilab and provision of opportunity for students to experience knowledge sharing in international events • https://www.facebook.com/groups/TBSSCharity/
- 15. SUPPORT • Community support – TBSS-Scilab User Group at Facebook (General enquiries on Scilab) – Specific project Facebook group, example: the Scilab Challenge@NTU 2014/2015 (Project related matters, announcement, …) • Contact – Lee Kar Heng (karheng@tbssc3e.com) (project matters) – Tan Thiam Huat (tanthiamhuat@e.ntu.edu.sg) (Scilab matters)
- 16. 1 - Scilab made by Inria 2003 – 2007: Scilab Consortium phase 1 (Inria) 2008 – 2012: Scilab Consortium phase 2 (DIGITEO Foundation) 2008: Free Scilab (GPL compatible) 2009: Xcos industrialization 1980: first MATLAB 1980 – 1990: BASILE software at Inria / Simulog 2010: Transfer to Scilab Enterprises Company 2012: Exclusivity of trademark, development and publishing of Scilab 1990 – 2003: Open Source Scilab (Research) Scilab freely distributed on the Net in 1994 2 - Scilab industrialization 3 – Scilab Enterprises HISTORY
- 17. • Scilab Powerful Computation Engine • Xcos Dynamic Systems Modeling and Simulation • ATOMS (AuTomatic mOdules Management for Scilab) Module Management SCILAB DISTRIBUTION
- 18. • High level programming language • Hundreds of mathematical functions • Advanced data structures & user- defined data types • Computation engine easy to embed into applications • Open System: extended capabilities with professional & specialized modules SCILAB: FREE AND OPEN SOURCE
- 19. • Mathematical functions • Matrix computation, sparse matrices • Polynomials and rational functions • Simulation: ODE and DAE • Classic and robust control, LMI optimization • Differentiable and non differentiable optimization • Interpolation, approximation • Signal processing • Statistics • Xcos: hybrid dynamical systems modeler and simulator More than 2,000 functions: KEY SCIENTIFIC FEATURES
- 20. • Dynamic System Modeling and Simulation • A user-friendly GUI-based editor for modeling and simulating hybrid dynamical systems as block diagrams: model construction, edition and customization • Integrated Modelica Compiler • Freely Available and distributed with Scilab XCOS
- 21. • Graphically model, compile, and simulate dynamical systems • Combine continuous and discrete-time behaviors in the same model • Select model elements from Palettes of standard blocks • Program new blocks in C, Fortran, or Scilab language • HDF5 standard which has been chosen to guarantee data exchanges between Scilab and Xcos Editor • Free Modelica compiler which enables the simulation of implicit diagrams • Graphical user interface based on JGraphX XCOS MAIN FEATURES
- 23. 2-D/3-D VisualizationEditor Embedded Help External Modules Manager Variable Editor PROGRAMMING ENVIRONMENT
- 24. • Great number of functionalities to create Graphical User Interfaces • Accessible from Scilab • Interaction between GUI and plots • Fully integrated in OS environment GRAPHICAL USER INTERFACES
- 25. What’s new? • Graphics: speed (Matplot), datatips, interactions, 3-D lightning • Graphical User Interface: new UI Controls • Remote file Access (sciCurl) • Scilab/MPI (Message Passing Interface) • Java Integration (JIMS) • HDF5 management • Localization of external modules Works under Windows XP/Vista/7/8, GNU/Linux and Mac OS X, 32 bits and 64 bits LATEST RELEASE SCILAB 5.5.2
- 26. • Management of C, C++, Fortran, Java, Python, .net... from Scilab: JIMS module for Java • Available as a computing engine with C, C++, Java, Python, .net API... • Links with: – Excel®, COM/DCOM® (Microsoft), – Labview® (National Instruments), – Isight® (Dassault Systèmes), – Alternova® (Eurodecision), – modeFRONTIER® (ESTECO), – etc. • [Video] Interface Scilab to Arduino LINKS WITH OTHER LANGUAGES
- 27. About 100,000 monthly downloads from 150 countries on www.scilab.org DOWNLOADS
- 28. 28 DOWNLOADS
- 29. Main industrial sectors • Aerospace: Airbus Group, CNES, Safran, Dassault Aviation • Transportation: Renault, LEONI, Siemens, Alstom, Faurecia • Mechanical: ArcelorMittal, Aperam • Energy: EDF, RTE, CEA, Total, IFP • Defence: DGA, THALES • Health: SANOFI • Telecom: Orange • Earth Science: BRGM, Eramet Academics, education High schools (French high schools) Engineering schools (TP, …) Universities (HCMUT, NUT, SUTD, …) In red: Scilab Enterprises customers USERS
- 30. Scilab is free software – Easy to install everywhere – Large community of users But freedom is not enough A friendly software with a lot of functionalities – Included toolboxes for most of applied mathematics – Own dedicated OpenGL graphics – Xcos comparable to Simulink – Easy to add interactively external module A comprehensive organization takes care of Scilab – Scilab developed professionally by Scilab Enterprises – Supports and services – IPC Scilab Users Group with important Companies CHANGING TO SCILAB
- 31. Scilab is not a clone of Matlab • Very similar languages • Same simple graphics functions: plot, bar, mesh, pie, surf • But different syntax and semantics for many functions: - Syntax example: “eigen” vs. “spec” - Semantics example: “max” function - Different management of source files Matlab / Scilab dictionary available in the Scilab help SCILAB … MATLAB
- 32. • Matrix computations: A=rand(1000,1000); b=rand(1000,1); x=Ab; norm(A*x-b) vp=spec(A); • 2D plots: plot(real(vp),imag(vp),"*r"); x=linspace(-%pi,%pi,1000); clf; plot(x,sin(x),"r",x,cos(x),"g"); 3D curve: k=tan(%pi/27);t=linspace(-40,40,1000); x=cos(t)./cosh(k*t); y=sin(t)./cosh(k*t); z=tanh(k*t); clf; param3d(x,y,z); SCILAB AS A CALCULATOR
- 33. 3D beautiful surface: 90,000 points function z=f(x,y) // function defining the surface z=exp(exp(-x^2-y^2)*(exp(cos(x^2+y^2)^20)+.. 8*sin(x^2+y^2)^20+2*sin(2*(x^2+y^2))^8)); endfunction x=linspace(-1.5,1.5,300); y=linspace(-1.5,1.5,300); z=feval(x,y,f); f=scf(0); f.color_map=rainbowcolormap(32); surf(x,y,z); // plot the surface e=gce(); e.color_mode=-1; a=gca(); a.box="off"; a.axes_visible=["off","off","off"]; a.x_label.visible="off"; a.y_label.visible="off"; a.z_label.visible="off"; SCILAB AS A CALCULATOR
- 34. To plot data in 2D with color according to the value of the points, modify data and then plot again Data are given in text file mandel.txt (2 million points, 19 Mb). 1. Put data into Scilab matrix M: M=fscanfMat("mandel.txt"); 2. Open graphics window, choose beautiful colormap and plot points according to its value: f=scf(1); f.color_map = rainbowcolormap(256); Matplot(M); 3. Discard points with value between 50 and 210 and plot in another window: M(find(50<M & M<210))=1; f=scf(2); f.color_map = rainbowcolormap(256); Matplot(M); SCILAB AS A PLOTTING TOOL
- 35. First plot Second plot Plotting is instantaneous: SCILAB AS A PLOTTING TOOL
- 36. To read text file takes time: M=fscanfMat("mandel.txt"); // 5 seconds 1. Save matrix into binary SOD (Scilab Open Data) based on HDF5 standard: save("mandel.sod","M"); // 0.04 second 2. Loading into Scilab is now very fast: load("mandel.sod"); // 0.1 second SCILAB FILE HANDLING
- 37. • Friendly editor, powerful mathematical language close to natural language: function u=Newton(f,fprim,u0,eps) u=u0; while abs(f(u))>eps then fp=fprim(u); if abs(fp)<=%eps then error("singularity") end u=u-f(u)/fp end endfunction About 1,300 Scilab functions are written in Scilab SCILAB PROGRAMMING
- 38. function x=Gauss(A,b,eps) n=size(b,"*"); x=b; for k=1:n-1 // when the diagonal term is close to 0 // searching for a non zero element in the column if abs(A(k,k))<eps then kk=find(abs(A(k:n,k))>eps); if kk==[] then disp(“Non invertible Matrix"); return; end // exchanging lines k and kk in A and in b kk=kk(1); lignek=A(k,:); A(k,:)=A(kk,:); A(kk,:)=lignek; lignek=b(k); b(k)=b(kk); b(kk)=lignek; end Gaussian elimination with partial pivoting: Scilab vectorized syntax SCILAB PROGRAMMING // Gauss algorithm for l=k+1:n p=A(l,k)/A(k,k); for m=k:n A(l,m)=A(l,m)-A(k,m)*p; end x(l)=x(l)-x(k)*p; end end if abs(A(n,n))<eps then disp("Non invertible Matrix "); return; end // compute x x(n)=x(n)/A(n,n); for i=n-1:-1:1 s=0; for j=i+1:n s=s+A(i,j)*x(j); end x(i)=(x(i)-s)/A(i,i); end endfunction
- 39. Save and load GUI as XML files : • Save GUI with: saveGui(f,"mygui.xml"); • Load GUI with: f=loadGui("mygui.xml"); New components, speed, default look and feel of the OS GUI WITH SCILAB 5.5.2
- 40. Scilab is The Professional Free Software for Numerical Computation Industry, Education and Research