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f1(x,y,z)=x^2+y^2+3*z; f2(x,y,z)=3x*y*z; f(x,y,z)=f1(x,y,z)*f2(x,y,z);ÏÖÔÚÏë»­³ö x=1ʱ£¬f(1,y,z)µÄÈýάͼ£¬²»ÖªµÀÈçºÎ»­£¿Çë½Ì¸÷λÁË
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Originally posted by jszhang at 2011-04-10 21:24:49:
±¾ÈËÒÔǰÓÃmathematical£¬¶Ômatlab²»ÊǺÜÊ죬²éÁË×ÊÁÏ»¹ÊDz»ÖªµÀÈçºÎ×öµ½
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f1(x,y,z)=x^2+y^2+3*z; f2(x,y,z)=3x*y*z; f(x,y,z)=f1(x,y,z)*f2(x,y,z);ÏÖÔÚÏë»­³ö x=1ʱ£¬f(1,y,z)µÄÈýάͼ£¬²»ÖªµÀÈç ...

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CODE:
[ y, z ] = meshgrid( [ -10 : 0.1 : 10 ], [ -10 : 0.1 : 10 ] );
x = 1;
f1 = x ^ 2 + y .^ 2 + 3 * z;
f2 = 3 * x * y .* z;
f = f1 .* f2;
surf( f )

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