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Ras=20+x1^2+x2^2-10*(cos(2*pi*x1)+cos(2*pi*x2))
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1592203609: ½ð±Ò+2, лл²ÎÓë½»Á÷ 2013-05-18 20:47:27
chen214365: ½ð±Ò+10, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, ¸ßÊÖ³öÂí£¬¹ûÈ»²»Í¬·²Ïì 2013-05-20 16:35:25
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CODE:
clear
clc
[ x1, x2 ] = meshgrid( -1 : 0.005: 1 );
Ras = 20 + x1 .^ 2 + x2 .^ 2 - 10 * ( cos( 2 * pi * x1 ) + cos( 2 * pi * x2 ) );

% subplot( 1, 2, 1 )
% surf( x1, x2, Ras )
%
% subplot( 1, 2, 2 )
contour( x1, x2, Ras, 20 )
set( gca, 'xlim',[ -1, 1 ], 'ylim', [ -1, 1 ] )

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