Computational Physics - A Practical Introduction to by Konstantinos Anagnostopoulos PDF

By Konstantinos Anagnostopoulos

ISBN-10: 1365583228

ISBN-13: 9781365583223

This e-book is an advent to the computational tools utilized in physics and different similar medical fields. it truly is addressed to an viewers that has already been uncovered to the introductory point of faculty physics, often taught through the first years of an undergraduate application in technological know-how and engineering. It assumes no past wisdom of numerical research, programming or desktops and teaches no matter what is critical for the answer of the issues addressed within the textual content. C++ is used for programming the middle courses and knowledge research is played utilizing the robust instruments of the GNU/Linux atmosphere. all of the worthwhile software program is open resource and freely available.

The publication starts off with extremely simple difficulties in particle movement and ends with an in-depth dialogue of complex recommendations utilized in Monte Carlo simulations in statistical mechanics. the extent of guideline rises slowly, whereas discussing difficulties just like the diffusion equation, electrostatics at the aircraft, quantum mechanics and random walks.

The e-book is given with a CC and GNU Public License and is usually on hand, including the accompanying software program from the book's web site www.physics.ntua.gr/~konstant/ComputationalPhysics

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Additional info for Computational Physics - A Practical Introduction to Computational Physics and Scientific Computing (using C++)

Example text

Close ( ) ; Reading from files is done in a similar way by using the class ifstream instead of ofstream. The next step will be to learn how to define and use functions. The program below shows how to define a function area_of_circle(), which computes the length and area of a circle of given radius. DAT” ) ; f o r ( i =0;i

223 The first line is taken by gnuplot as a comment line, since it begins with a #. In fact, gnuplot ignores everything after a #. In order to plot the second column as a function of the first, type the command: gnuplot > p l o t ” data ” using 1 : 2 with points The name of the file is within double quotes. After the keyword using, we instruct gnuplot which columns to use as the x and y coordinates, respectively. The keywords with points instructs gnuplot to add each pair (xi , yi ) to the plot with points.

1415926535897932; double R = 4 . 0 ; cout << ” P e r i m e t e r= ” << 2 . 0 * PI * R << ”\n” ; cout << ” Area= ” << PI * R * R << ”\n” ; } The first two statements in main() declare the values of the variables PI and R. These variables are of type double, which are floating point numbers³³. The following two commands have two effects: Computing the length 2πR and the area πR2 of the circle and printing the results. 0*PI*R and PI*R*R are evaluated before being printed to the stdout. 0. If we write 2 or 4 instead, then these are going to be constants of the int type and by using them the wrong way we may obtain surprising results³⁴.

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Computational Physics - A Practical Introduction to Computational Physics and Scientific Computing (using C++) by Konstantinos Anagnostopoulos


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