Agilent Technologies All Troubleshooting Guide download pdf (Page 156)

Lab Exercise: Commands

Registers, Objects, and Tables

148

Try typing:

Item$=ObjHdrName$(ChromReg[1],3) <enter>

Obtype=ObjHdrType(ChromReg[1],item$) <enter>

Print "Item 3 in object 1 is called",Item$,"and is

a",Obtype,"variable" <enter>

Note: The answer to your print appears above the command line. 0 is a

string variable.

Data Matrix

To complete the next section, you will need to load the method, democal1.m, load

the data file, demo\005_0101.d, and print a report. Do these tasks now.

1) To obtain the actual x and y coordinates of a chromatogram or spectrum, use

the Data(Register,axis,datapoint) function. Type:

Timeof3rddatapoint=Data(ChromReg[1],0,3) <enter>

where 0 indicates the x-axis

Print Timeof3rddatapoint <enter>

Absorbanceof20thdatapoint=Data(ChromReg[1],1,20) <enter>

where 1 specifies the y-axis

Print Absorbanceof20thdatapoint <enter>

2) Reference a time value in the chromatographic signal directly using the

DataIndex function. You can use the index number to retrieve the absorbance

data at a given time.

Index=DataIndex(ChromReg[1],5.0)

Absorbance=Data(ChromReg[1],1,Index)

The above commands obtain the data index at time 5.0.

Use the print command to access the values obtained.

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Agilent Technologies All Troubleshooting Guide Page 156