levelof有两种不同的功能。首先,它提供了varname的不同值的列表。更常见的情况是,当你想要循环使用(比如)foreach;参见[P] foreach。levelof会留下一个r(levels)的列表,可以在后续的命令中使用。当需要获得非整数数据的级别时,可以使用matrow(matname)来获得完全精确的级别。 案例1: . use https://www.stata...
Tool to ensure the sampling of all levels of a factorial variabledamien g
Even various levels of variability (intra- vs. inter-individual, intra- vs. inter-population variability) can be determined and compared with this method. In addition, the MPD can be calculated independently for any acoustic variable. This opens up a broad variety of research options in the ...
Recent empirical studies have demonstrated that speciation with gene flow is more common than previously thought. From a conservation perspective, the potential negative effects of hybridization raise concerns on the genetic integrity of endangered speci
This is a new objective for a scoring method that's based on patterns learned from all the available variables. 展开 关键词: Practical/ distributed databases optimisation regression analysis statistics unsupervised learning/ scoring level categorical variable heterogeneous mixed-type data supervised learning...
Estrone did not correlate with any disease variable, whereas estradiol correlated strongly and positively with all measured indices of inflammation. CONCLUSION: Men with RA had aberrations in all sex hormones analyzed, although only estradiol consistently correlated with inflammation. The high levels of ...
程序错误warning C4047: 'function' : 'char *' differs in levels of indirection from 'char '的原因是char*不能与char转换（不同级别）
The paper reviews different approaches, technologies, and strategies to manage large-scale schemes of variable renewable electricity such as solar and wind power. We consider both supply and demand side measures. In addition to presenting energy system flexibility measures, their importance to renewable...
The experimental design employed for the present study was a four-variables (five levels of each variable), second order central composite design with five replications at the center points (0,0,0,0) in coded levels of variables (1.414,1, 0, 1, and 1.414) (Akhnazarova and Kafarov,...
New research results in several areas that can help to facilitate the large-scale integration of variable renewable power sources into the electric power s... Apt,Jay - MRS Energy & Sustainability - A Review Journal 被引量: 3发表: 2015年 Perspective on multi-scale assets for clean energy tec...