gnuplot \u3060\u3051\u3067\uff0c\u78c1\u529b\u7dda\u3092\u6570\u5024\u7684\u306b\u89e3\u304d\uff0c\u78c1\u529b\u7dda\u306b\u6cbf\u3063\u305f\u78c1\u5834\u30d9\u30af\u30c8\u30eb\u3092\u63cf\u304f\u3002\u78c1\u5834\u30d9\u30af\u30c8\u30eb\u304c\u78c1\u529b\u7dda\u306e\u63a5\u30d9\u30af\u30c8\u30eb\u3067\u3042\u308b\u3053\u3068\u304b\u3089\uff0c\u5fae\u5206\u65b9\u7a0b\u5f0f\u3092\u30eb\u30f3\u30b2\u30fb\u30af\u30c3\u30bf\u6cd5\u3067\u89e3\u304d\uff0c\u6570\u5024\u89e3\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u4fdd\u5b58\u3057\uff0c\u305d\u308c\u3092\u8aad\u307f\u8fbc\u3093\u3067\u78c1\u5834\u30d9\u30af\u30c8\u30eb\u306e\u59cb\u70b9\u306e\u5ea7\u6a19\u3068\u3057\u3066\u30d9\u30af\u30c8\u30eb\u5834\u3092\u63cf\u304f\u3002\u3053\u308c\u3092\u5168\u3066 gnuplot \u3060\u3051\u3067\u3084\u308b\u3002<\/p>\n
\u53c2\u8003\uff1a<\/p>\n
gnuplot \u3060\u3051\u3067\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3057\u305f\u308a\uff0c\u6570\u5024\u8a08\u7b97\u3057\u305f\u308a\u3059\u308b\u969b\u306e\u53c2\u8003\u3068\u3057\u3066<\/p>\n
$$\\boldsymbol{B} = \\frac{1}{2\\pi\\varepsilon_0 c^2} \\frac{\\boldsymbol{I}_1\\times \\left(\\boldsymbol{\\rho} – \\boldsymbol{r}_1\\right)}{|\\boldsymbol{\\rho} – \\boldsymbol{r}_1|^2}
\n+ \\frac{1}{2\\pi\\varepsilon_0 c^2} \\frac{\\boldsymbol{I}_2\\times \\left(\\boldsymbol{\\rho} – \\boldsymbol{r}_2\\right)}{|\\boldsymbol{\\rho} – \\boldsymbol{r}_2|^2}$$\\begin{eqnarray}
\n\\boldsymbol{I}_1 &=& (0, 0, \\pm I)\\\\
\n\\boldsymbol{I}_2 &=& (0, 0, I) \\\\
\n\\boldsymbol{\\rho} &=& (x, y, 0) \\\\
\n\\boldsymbol{r}_1 &=& (-1, 0, 0) \\\\
\n\\boldsymbol{r}_2 &=& (1, 0, 0) \\\\
\n\\end{eqnarray}<\/p>\n
\u3068\u3057\uff0c\u9069\u5b9c\u5b9a\u6570\u90e8\u5206\u3092\u898f\u683c\u5316\u3057\u3066
\n\\begin{eqnarray}
\nB_x(x,y) &=& \\pm \\frac{-y}{\\left(x-x_1\\right)^2 + \\left(y-y_1\\right)^2 }
\n+\\frac{-y}{\\left(x-x_2\\right)^2 + \\left(y-y_2\\right)^2} \\\\
\nB_y(x,y) &=& \\pm \\frac{x}{\\left(x-x_1\\right)^2 + \\left(y-y_1\\right)^2 }
\n+\\frac{x}{\\left(x-x_2\\right)^2 + \\left(y-y_2\\right)^2} \\\\
\n\\end{eqnarray}<\/p>\n
\u898f\u683c\u5316\u3057\u305f $\\hat{\\boldsymbol{B}}$ \u306f<\/p>\n
\\begin{eqnarray}
\nB(x,y) &=& \\sqrt{\\left\\{B_x(x,y) \\right\\}^2 + \\left\\{B_y(x,y) \\right\\}^2}\\\\
\n\\hat{B}_x(x,y) &=& \\frac{B_x(x,y)}{B(x,y)} \\\\
\n\\hat{B}_y(x,y) &=& \\frac{B_y(x,y)}{B(x,y)} \\\\
\n\\end{eqnarray}<\/p>\n