> I don't know what other > method could work. I have an integral, which is spread over a large span > along x-axis.
http://www.gnu.org/software/gsl/manual/html_node/QAGP-adaptive-integration-with-known-singular-points.html ? http://www.gnu.org/software/gsl/manual/html_node/QAGS-adaptive-integration-with-singularities.html ? - Rhys
