基于QT的曲线绘制程序模块，可以加入到自己的程序，轻松实现曲线绘制功能！,A class which Plot 2D curve based QT

Qwt类库是一套用于科学计算分析及图形展现的Qt工具集和图表组件。-The Qwt library contains GUI Components and utility classes which are primarily useful for programs with a technical background. Beside a 2D plot widget it provides scales, sliders, dials, compasses, thermometers, wh