用Octave计算微分方程

求\(xy''+3y'=0\)的通解.

程序代码如下

function [text_result, numeric_result] = func84()
    pkg load symbolic;
    x=sym('x');
    y=sym('y(x)');
    de = diff(diff(y)) * x + 3 * diff(y);
    result = dsolve (de);
    text_result = ["\n", disp(result)];
    numeric_result = eval(result);
endfunction

结果如下

>> [text_result, numeric_result] = func84()
text_result =
         C₂
    C₁ + ──
          2
         x

numeric_result = (sym)

         C₂
    C₁ + ──
          2
         x

用Octave计算微分方程

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