Graph plotting file name = " "," "

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A better plot may result from copying Facets graph coordinates, see "Copy Plot Data to Clipboard".

 

Provides the values plotted in Table 8 for the probability curves and expected score ogive in fixed column format. If comma-separated values are preferred, specify "Graphfile=filename, CSV" or CSV=Y. For Tab-separated values, specify "Graphfile=filename, Tab" or CSV=Tab

 

Heading lines= controls display of heading lines. QM= quotation marks, controls whether labels are within quotation marks.

 

From the Output Tables menu, this Graph Output file controls the production of the Graph output file

 

Field

Columns

Contents

1

1-10

Scale number(matches Sub-Table number for Table 8)

2

11-20

Measure (X-Axis)

3

21-30

Expected Score

4

31-40

Category value corresponding to expected score

5

41-50

Probability for bottom category

6

51-60

Probability for second category

7 ...

61-70, ...

Probabilities for higher categories

 

    Scale   Measure  Expected    ExpCat    Prob:0    Prob:1    Prob:2

        1     -3.00       .10         0       .90       .10       .00

        1     -2.91       .11         0       .89       .11       .00

        1     -2.82       .12         0       .88       .11       .00

 

Example:Provide coordinates so I can plot beautiful probability curves using my graphics package:

Graphfile=plot.dat,CSV; the name of an output file with comma-separated values, produces, for a 3 category rating scale (or partial credit):

 

1,-2.00,.23,0,.79,.20,.01

1,-1.92,.24,0,.77,.21,.02

1,-1.85,.26,0,.76,.22,.02


Help for Facets Rasch Measurement Software: www.winsteps.com.