RTW_TLC_命令数据流.docx

guide.rtw 记录文件的全文# $Revision: $# File: guide.rtwIllustrative record file, which cant be used by Simulink# Note: string values MUST be in quotesTop # Outermost Record, called Top Date 21-Aug-2008 # Name/Value pair named Top.Date Employee # Nested record within the Top record FirstName Arthur # Alpha field Top.Employee.FirstName LastName Dent # Alpha field Top.Employee.LastName Overhead 1.78 # Numeric field Top.Employee.Overhead PayRate 11.50 # Numeric field Top.Employee.PayRate GrossRate 0.0 # Numeric Field Top.Employee.GrossRate # End of Employee record NumProject 3 # Indicates length of following list Project # First list item, called Top.Project0 Name Tea # Alpha field Name, Top.Project0.Name Difficulty 3 # Numeric field Top.Project0.Difficulty # End of first list item Project # Second list item, called Top.Project1 Name Gillian # Alpha field Name, Top.Project1.Name Difficulty 8 # Numeric field Top.Project1.Difficulty # End of second list item Project # Third list item, called Top.Project2 Name Zaphod # Alpha field Name, Top.Project2.Name Difficulty 10 # Numeric field Top.Project2.Difficulty # End of third list item # End of Top record and of fileTLC文件read-guide.tlc如下：% File: read-guide.tlc (This line is a TLC Comment, and will not print)% $Revision: $% To execute this file, type: tlc -v -r guide.rtw read-guide.tlc% Set format for displaying real values (default is EXPONENTIAL)%realformat CONCISEUsing TLC you can:* Directly access any fields value, e.g./输出到文件%assign td = % + /assing后的语句不会出现在数据流中，仅仅起到分配变量的作用 % - evaluates to: /td为拼接后的字符串 %* Assign contents of a field to a variable, e.g.%assign worker = Top.Employee.FirstName %assign worker = Top.Employee.FirstName worker expands to Top.Employee.FirstName = %* Concatenate string values, e.g.%assign worker = worker + + Top.Employee.LastName %assign worker = worker + + Top.Employee.LastName worker expands to worker + + Top.Employee.LastName = % * Perform arithmetic operations, e.g.%assign wageCost = Top.Employee.PayRate * Top.Employee.Overhead %assign wageCost = Top.Employee.PayRate * Top.Employee.Overhead wageCost expands to Top.Employee.PayRate * Top.Employee.Overhead . - % * % = % * Put variables into a field, e.g. Top.Employee.GrossRate starts at %assign Top.Employee.GrossRate = wageCost %assign Top.Employee.GrossRate = wageCost Top.Employee.GrossRate expands to wageCost = %* Index lists of values, e.g.%assign projects = Top.Project0.Name + , + Top.Project1.Name.+ , + Top.Project2.Name %assign projects = Top.Project0.Name + , + Top.Project1.Name. + , + Top.Project2.Name projects expands to Top.Project0.Name + , + Top.Project1.Name + , + Top.Project2.Name = %* Traverse and manipulate list data via loops, e.g.%assign diffSum = 0.0%foreach i = Top.NumProject - At top of Loop, Project = %; Difficulty = . % %assign diffSum = diffSum + Top.Projecti.Difficulty - Bottom of Loop, i = %; diffSum = %endforeach%assign avgDiff = diffSum / Top.NumProject Average Project Difficulty expands to diffSum / Top.NumProject = % . / % = % End of read-guide.tlc运行命令： tlc -v -r guide.rtw read-guide.tlc 输出数据流如下：Using TLC you can:* Directly access any fields value, e.g. % - evaluates to: 21-Aug-2008* Assign contents of a field to a variable, e.g. %assign worker = Top.Employee.FirstName worker expands to Top.Employee.FirstName = Arthur* Concatenate string values, e.g. %assign worker = worker + + Top.Employee.LastName worker expands to worker + + Top.Employee.LastName = Arthur Dent * Perform arithmetic operations, e.g. %assign wageCost = Top.Employee.PayRate * Top.Employee.Overhead wageCost expands to Top.Employee.PayRate * Top.Employee.Overhead - 11.5 * 1.78 = 20.47 * Put variables into a field, e.g. Top.Employee.GrossRate starts at 0.0 %assign Top.Employee.GrossRate = wageCost Top.Employee.GrossRate expands to wageCost = 20.47* Index lists of values, e.g. %assign projects = Top.Project0.Name + , + Top.Project1.Name. + , + Top.Project2.Name projects expands to Top.Project0.Name + , + Top.Project1.Name + , + Top.Project2.Name = Tea, Gillian, Zaphod* Traverse and manipulate list data via loops, e.g. - At top of Loop, Project = Tea; Difficulty = 3 - Bottom of Loop, i = 0; diffSum = 3.0 - At top of Loop, Project = Gillian; Difficulty = 8 - Bottom of Loop, i = 1; diffSum = 11.0 - At top of Loop, Project = Zaphod; Difficulty = 10 - Bottom of Loop, i = 2; diffSum = 21.0 Average Project Difficulty expands to diffSum / Top.NumProject = 21.0 / 3 = 7.0逐句分析：%assign td = % + % - evaluates to: % %被转化为：Using TLC you can:* Directly access any fields value, e.g. % - evaluates to: 21-Aug-2008 21-Aug-2008 % 这种语法是错误的，因为不可嵌套。而如下这种方式：%a