我是靠谱客的博主 坦率橘子，最近开发中收集的这篇文章主要介绍[MATLAB调试笔记]Update magnetic field in one step，觉得挺不错的，现在分享给大家，希望可以做个参考。
概述
function [field] = bfield(field,prm)
% Update magnetic field in one step
X2 = prm.X2;
f = field; % reference to Field obj
f.by(X2) = f.by(X2) + f.ez( X2) - f.ez(X2-1);
f.bz(X2) = f.bz(X2) - f.ey(X2+1) + f.ey(X2 );
f.by(prm.nxp2)= f.by(2);%对称边界条件
f.bz(prm.nxp2)= f.bz(2);
f.by(1) = f.by(prm.nxp1);
f.bz(1) = f.bz(prm.nxp1);
end
>> prm.X2
ans =
Columns 1 through 16
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Columns 17 through 32
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
Columns 33 through 48
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
Columns 49 through 64
50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65
Columns 65 through 80
66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
Columns 81 through 96
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97
Columns 97 through 112
98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113
Columns 113 through 128
114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129
>> f.by(X2)
ans =
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
>> f.ez( X2)
ans =
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
>> f.by(X2) = f.by(X2) + f.ez( X2) - f.ez(X2-1)
f =
Field with properties:
ex: [130×1 double]
ey: [130×1 double]
ez: [130×1 double]
by: [130×1 double]
bz: [130×1 double]
rho: [130×1 double]
ajx: [130×1 double]
ajy: [130×1 double]
ajz: [130×1 double]
>> f.by(X2) = f.by(X2) + f.ez( X2) - f.ez(X2-1)
f =
Field with properties:
ex: [130×1 double]
ey: [130×1 double]
ez: [130×1 double]
by: [130×1 double]
bz: [130×1 double]
rho: [130×1 double]
ajx: [130×1 double]
ajy: [130×1 double]
ajz: [130×1 double]
>> f.bz(X2) = f.bz(X2) - f.ey(X2+1) + f.ey(X2 )
f =
Field with properties:
ex: [130×1 double]
ey: [130×1 double]
ez: [130×1 double]
by: [130×1 double]
bz: [130×1 double]
rho: [130×1 double]
ajx: [130×1 double]
ajy: [130×1 double]
ajz: [130×1 double]
>> bfield(field,prm)
Unrecognized function or variable 'bfield'.
Did you mean:
>> field(field,prm)
Unable to use a value of type Field as an index.
>> bfield(field,prm)
ans =
Field with properties:
ex: [130×1 double]
ey: [130×1 double]
ez: [130×1 double]
by: [130×1 double]
bz: [130×1 double]
rho: [130×1 double]
ajx: [130×1 double]
ajy: [130×1 double]
ajz: [130×1 double]
>> 最后
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