Rank: 346 based on 247 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 View all
Updated   File Tags Downloads
(last 30 days)
Comments Rating
15 Aug 2014 Screenshot Elastic Response Spectra Fast calculation of elastic response spectra Author: George Papazafeiropoulos elastic, response, spectrum, damping, single step, single solve 76 0
30 May 2014 Screenshot Non self-intersecting polyline Connect given points in plane with a polyline which does not intersect itself Author: George Papazafeiropoulos polyline, intersect, plane, point, connect 16 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 27 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 32 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 41 0
  • 4.8
4.8 | 5 ratings
Comments and Ratings by George 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's 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 Suresh, Hamsini

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

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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