session(secr)
session()所属R语言包：secr
Session Vector
会议向量
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Extract or replace the session names of a capthist object.
提取或更换的capthist对象的会话名称。
用法----------Usage----------
session(object, ...)
session(object) <- value
参数----------Arguments----------
参数：object
object with "session" attribute e.g. capthist
“会话”属性，例如对象capthist
参数：value
character vector or vector that may be coerced to character, one value per session
字符向量或向量可能被强制转换为字符，每节一个值
参数：...
other arguments (not used)
其他参数（未使用）
Details
详细信息----------Details----------
Replacement values will be coerced to character.
更换的值将被强制转换为字符。
值----------Value----------
a character vector with one value for each session in capthist
字符向量，为每个会话中的一个值capthist
注意----------Note----------
Like Density, secr uses the term "session" for a closed-population sample. A session usually includes data from several closely-spaced capture occasions (often consecutive days). Each 'primary session' in the "robust" design of Pollock (1982) would be treated as a session in secr. secr also uses "session" for independent subsets of the capture data distinguished by characteristics other than sampling time (as above). For example, two grids trapped simultaneously could be analysed as distinct sessions if (i) they were far enough apart that there was negligible prospect of the same animal being caught on both grids, and (ii) there was interest in comparing estimates from the two grids, or fitting a common detection model.
样密度，secr使用的术语“会话”对一个封闭的人群样本。会话通常包括几个紧密间隔的采集场合（通常是连续两天）的数据。波洛克（1982）稳健的设计每个主会话“，在将被视为secr会话。 secr还使用以外的采样时间（如上述）的特性区分的捕获数据的独立的子集的“会话”。例如，可以同时两个网格被困分析作为不同的会话，如果（i）它们相隔足够远，是微不足道的前景被夹在两个网格相同的动物，及（ii）在比较从两个估计有兴趣网格，或安装一个共同的检测模型。
The log likelihood for a session model is the sum of the separate session log likelihoods. Although this assumes independence of sampling, parameters may be shared across sessions, or session-specific parameter values may be functions of session-level covariates. For many purposes, "sessions" are equivalent to "groups". For multi-session models the detector array and mask are specified separately for each session. Group models are therefore generally simpler to implement. On the other hand, sessions offer more flexibility in defining and evaluating between-session models, including trend models.
会话模型的对数似然是单独的会话log似然的总和。虽然这是假设独立的采样，参数可能会被共享的会话，或特定会话的参数值可能是会话级的协变量的函数。出于多种目的，“会议”是等价的团体“。对于多会话模型的探测器阵列和掩码分别指定每个会话。因此，集团车型一般更容易实现。另一方面，会话在定义和评价之间的会话模型提供了更多的灵活性，包括趋势模型。
Sessions are a recent addition to secr and the documentation and testing of session capability is therefore less advanced than for other features.
会议是最近除了secr和库文件和测试的会话能力，因此比其他功能先进。
参考文献----------References----------
probability of capture. Journal of Wildlife Management 46, 752–757.
参见----------See Also----------
capthist
capthist
实例----------Examples----------
session(captdata)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注：
注1：为了方便大家学习，本文档为生物统计家园网机器人LoveR翻译而成，仅供个人R语言学习参考使用，生物统计家园保留版权。
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发表于 2012-9-30 00:04:48
