Data for: CFLab: A MATLAB GUI program for decomposing sediment grain size distribution using Weibull functions

Here we provide a flexible and efficient MATLAB® GUI (Graphic User Interface) program CFLab (Curve Fitting Lab) to perform curve fitting on sediment grain size distributions using Weibull Probability Distribution Functions. CFLab deals with one grain size distribution each time. It considers the curve fitting problem as a problem of constrained nonlinear programming. In CFLab, initial solution for this problem can be set either by designating a series of numbers for the undetermined parameters in the problem or using a novel interactive strategy. The trust-region-reflective algorithm is used to solve the problem. Major results generated by CFLab include the percentages and grain size distributions of subpopulations fitting the raw grain size distribution data and many statistic parameters of the subpopulations calculated using two methods. CFLab can be used to study a wide range of eolian and hydraulic sediments.本研究提供一款灵活高效的MATLAB®图形用户界面（Graphic User Interface，GUI）程序CFLab（Curve Fitting Lab，即曲线拟合实验室），可基于威布尔概率分布函数（Weibull Probability Distribution Functions）对沉积物粒度分布开展曲线拟合工作。CFLab单次仅处理一组粒度分布数据，将曲线拟合问题建模为约束非线性规划问题。在CFLab中，该问题的初始解可通过两种途径设定：一是为待确定参数指定一组数值，二是采用一种新颖的交互式策略。求解该问题时采用信赖域反射算法（trust-region-reflective algorithm）。CFLab生成的主要结果包括适配原始粒度分布数据的各子群体占比与粒度分布，以及通过两种方法计算得到的各子群体的多项统计参数。该工具可用于研究多种风成沉积物与水成沉积物。