Rank: 250 based on 392 downloads (last 30 days) and 9 files submitted
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George Papazafeiropoulos

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Company/University
National Technical University of Athens
Lat/Long
37.97754, 23.77779

Personal Profile:

George Papazafeiropoulos

First Lieutenant, Infrastructure Engineer, Hellenic Air Force
Civil Engineer, M.Sc., Ph.D. candidate, NTUA

Mailto: gpapazafeiropoulos@yahoo.gr
Website: http://users.ntua.gr/gpapazaf/
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Files Posted by George Papazafeiropoulos View all
Updated   File Tags Downloads
(last 30 days)
Comments Rating
27 Nov 2014 Screenshot Computational Geometry Toolbox Convex hull, mesh generation, Delaunay triangulation, Voronoi diagram and other algorithms. Author: George Papazafeiropoulos bounding box, concave, convex, cube, delaunay, duality 93 0
08 Sep 2014 Screenshot Elastic Response Spectra Fast calculation of elastic response spectra Author: George Papazafeiropoulos elastic, response, spectrum, damping, single step, single solve 82 0
13 May 2014 Screenshot Stroop Test Test two key cognitive skills, response inhibition and selective attention Author: George Papazafeiropoulos stroop, test, response, inhibition, selective, attention 36 0
  • 5.0
5.0 | 1 rating
13 Mar 2014 Screenshot Fractional differentiation and integration The n-th order derivative or integral of a function is calculated through Fourier series expansion. Author: George Papazafeiropoulos gauss, legendre, fractional, differentiation, derivative, integration 28 0
10 Mar 2014 Screenshot Arc-length method Finds the roots of a function using the arc-length method Author: George Papazafeiropoulos arc length method, nonlinear equation, aders, national technical un..., equilibrium path, fsolve 66 0
  • 4.8
4.8 | 5 ratings
Comments and Ratings by George Papazafeiropoulos View all
Updated File Comments Rating
20 Nov 2013 Newton method with line search Finds the roots of a function using the Newton method with line search Author: George Papazafeiropoulos

It seems you want to use the simple full Newton-Raphson algorithm. In case you use the line_search function, g(u) could be the first argument of your function and K (stiffness matrix) the second argument (its jacobian). In your algorithm, the iteration termination condition should be r(n)<tol, where tol would be some very small tolerance.

06 Aug 2013 Write Cell Array to Text File A cell array is written to a delimited output file, incl. options for appending & custom delimiters. Author: Roland Pfister

I changed the lines 96 to 104 which were the following:

% Cell i,j is written to the output file. A delimiter is appended
% for all but the last element of each row.
fprintf(output_file,'%s',output{i,j});
if j ~= size(cell_array,2)
fprintf(output_file,'%s',delimiter);
end
end;
% At the end of a row, a newline is written to the output file.
fprintf(output_file,'\r\n');

into the following:

% Cell i,j is written to the output file. A delimiter is appended for
% all but the last element of each row. At the end of a row, a newline
% is written to the output file.
if j < size(cell_array,2)
fprintf(output_file,['%s',delimiter],output{i,j});
else
fprintf(output_file,'%s\r\n',output{i,j});
end
end;

and it runs fine. The newline written to the output file at the end of each line was erroneously left outside the for j = 1:size(cell_array,2) loop. In addition the delimiter and the '%s' strings were concatenated into a single string to provide input for the fprintf function.

Comments and Ratings on George Papazafeiropoulos' Files View all
Updated File Comment by Comments Rating
15 Jun 2014 Arc-length method Finds the roots of a function using the arc-length method Author: George Papazafeiropoulos Hamsini Suresh

05 Jun 2014 Stroop Test Test two key cognitive skills, response inhibition and selective attention Author: George Papazafeiropoulos Adam Danz

12 Mar 2014 Arc-length method Finds the roots of a function using the arc-length method Author: George Papazafeiropoulos konnos

12 Mar 2014 Arc-length method Finds the roots of a function using the arc-length method Author: George Papazafeiropoulos Eugene

28 Jan 2014 Arc-length method Finds the roots of a function using the arc-length method Author: George Papazafeiropoulos Benyamin

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