平行坐標(biāo)是數(shù)據(jù)可視化領(lǐng)域中有著廣泛應(yīng)用的一種技術(shù)，為了增強(qiáng)其可視性提出了顏
色比例法以區(qū)分相交折線，圓心角映射法展示信息的分布和坐標(biāo)軸非等值變化顯示重點(diǎn)區(qū)域詳細(xì)信息。顏色比例法根據(jù)后一區(qū)間內(nèi)直線段的顏色構(gòu)成情況判斷出與前一區(qū)間內(nèi)直線段的對應(yīng)關(guān)系；圓心角映射法展示一定條件下信息在多個維上的分布，將一個分組在相應(yīng)維上占有的比例映射成對應(yīng)圓心角的大小；坐標(biāo)軸非等值變化通過多層焦點(diǎn)的交互控制實(shí)現(xiàn)，可以充分利用坐標(biāo)軸空間，在觀察重點(diǎn)區(qū)域詳細(xì)信息的同時保持總體瀏覽。實(shí)驗(yàn)結(jié)果表明能夠得到較好的可視化效果。
關(guān)鍵詞: 平行坐標(biāo)技術(shù)；相交折線；圓心角映射；多層焦點(diǎn)
Abstract: Parallel coordinate is a kind of technology used extensively in data visualization. For
strengthen its visibility, we present color proportion method to distinguish cross poly-lines, central angle mapping method to exhibit information distribution, and axes are not changed equivalently showing the detailed information in the key area. Color Proportion judges the corresponding relation of straight lines in next region and in previous region according to the line color composing information in next region. Central Angle Mapping shows information distribution on multi-dimension under certain conditions, the proportion one group occupying in one dimension corresponds to the size of central angle. The axis is not changed equivalently, through managing multiple focal levels, can fully utilize axis space, keeping overall information while observing detailed information of key area. The experimental results indicate that can get better visual result.
Key words: parallel coordinates; cross poly-lines; central angle mapping; multiple focal levels