冶金研究中线性作图的依据及线性图评价

比较了目前冶金研究中常用的几种线性作图方法的优缺点及其理论根据，并检验了目前文献中的一些线性作图。研究认为：与以往的描点法和最小二乘法相比，以相关系数ｒ表示线性程度好坏的方法最为准确。用这种方法检验了有关文献中的１０组线性作图，表明只有在等于或小于９５％的置信度水平下，这些线性图在统计意义上才是合格的。通常在数据小于５组以下时，不合格的可能性很大。

Theory and Review of Linear Drawings in Metallurgical Research

Theory and advantages as well as disadvantages of several approaches of drawing linear graphs in metallurgical research have been given and compared,and some linear drawings chosen in current periodicals have also been examined.The study indicates that compared with the depicting and the least square methods the linear correlation coefficient r is the most reasonable way to express a degree of linear correlation.The linear drawings chosen from current periodicals are basically significant only at or less than 95% confident level according to the examinations by the linear correlation coefficient r .