一种改进的Radviz数据可视化方法  

An Improved Radviz Data Visualization Method

作　　者：胡健[1] 李济龙 曹丹阳[1] 

机构地区：[1]北方工业大学电子信息工程学院,北京100144

出　　处：《北方工业大学学报》2015年第3期30-35,共6页Journal of North China University of Technology

基　　金：国家自然科学基金项目(61105045);北京市自然科学基金资助项目(4144073);2014年北方工业大学科研启动基金项目

摘　　要：针对原有Radviz可视化算法将属性值均匀分布在圆周上造成属性间的值相互抵消,从而导致数据遮盖度较大及可视化图形有内缩趋势等问题,提出了一种新的可视化算法.新算法只使用1/4圆周,增强了属性间的合力,降低了数据遮盖度,更好的保持了原有数据集的特征.通过2组实验对新提出的Radviz改进型算法进行验证,2组实验结果表明改进型的算法可视化效果好于原Radviz可视化算法的效果.新算法为了继续使用弹簧模型,提出了固定点弹性系数的概念,并给出了2个确定弹性系数值的公式.Aiming to solve the problem of the present Radviz visualization algorithm of attribute value being uniformly distributed on the circumference of a circle between properties that resulted in the value offsetting of each other, which may lead to a larger data hiding, and the problem of the visual graphics being retracted, we propose a new visualization algorithm. By using only a quarter of a circle, the new algorithm enhances the force between the attributes, reduces the data cover degree, and better maintains the characteristics of the original data set. Through two groups of experiments to verify this new improved algorithm of Radviz, the experimental result shows that the modified algo- rithm visualization effect is better than that of the original Radviz. In order for the spring model to con- tinue to be used in the new algorithm, we put forward the concept of fixed point elasticity coefficient and propose two formulae to determine the elastic coefficient.

关 键 词：Radviz 数据可视化 弹簧模型 1/4圆弧 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]