Campbell-scientific CR800 and CR850 Measurement and Control Systems Manual de usuario descargar pdf (Pagina 480)

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101

Appendix A. CRBasic Programming Instructions

480

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LevelCrossing

Processesdataintoaone‐ortwo‐dimensionalhistogramusingalevel‐crossing

countingalgorithm.

Syntax

LevelCrossing(Source, DataType, DisableVar, NumLevels,

2ndDim, CrossingArray, 2ndArray, Hysteresis, Option)

RainFlow

ProcessesdatawiththeRainflowcountingalgorithm,essentialtoestimating

cumulativedamagefatiguetocomponentsundergoingstress/straincycles(see

DowningS.D.,SocieD.F.(1982)SimpleRainflowCountingAlgorithms.

InternationalJournalofFatigueVolume4,Issue1).

Syntax

RainFlow(Source, DataType, DisableVar, MeanBins, AmpBins,

Lowlimit, Highlimit, MinAmp, Form)

A.7 String Functions

Read More! See String Operations (p. 237)

& Concatenates string variables.

+ Concatenates string and numeric variables.

- Compares two strings, returns zero if identical.

A.7.1 String Operations

String Constants

Constantstringscanbeusedinexpressionsusingquotationmarks.For

example:

FirstName = "Mike"

String Addition

Stringscanbeconcatenatedusingthe'+'operator.Forexample:

FullName = FirstName + " " + MiddleName + " " + LastName

String Subtraction

String1‐String2resultsinanintegerintherangeof‐255..+255.

String Conversion to/from Numerics

Conversionofstringstonumericsandnumericstostringsisdone

automaticallywhenanassignmentismadefromastringtoanumericor

anumerictoastring,ifpossible.

String Comparison Operators

Thecomparisonoperators=,>,<,<>,>=and<=operateonstrings.

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