查看“IDL中的微分和积分程序”的源代码

==积分==
===内置程序===
*qromb
:using Romberg integration.
*qromo
:using a modified Romberg's method (section 4.4 of Numerical Recipes in C)
*qsimb
:using Simpson's rule

*INT_2D,INT_3D,INT_TABULATED

===astro_lib===
*也有一个qsimp，但是是子程序形式，上面内禀的是函数形式
:该子程序比内禀函数更快，因为用的是数组运算* QTRAP
* QTRAP
:  Integrate using trapezoidal rule to specified accuracy. (section 4.2 of Numerical Recipes)