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Illinois Goal Assessment Program

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Presentation on theme: "Illinois Goal Assessment Program"— Presentation transcript:

1 Illinois Goal Assessment Program

2 Ugly Data Http://research.umbc.edu/~coates/ec611/612_sample.txt
$, decimals, dashes, semicolons 709 variables, 3835 observations Try reading the data into excel How many variables? Open wordpad, paste and save as a txt file

3 Stata data dictionary dictionary using “raw data file name” _column() tells Stata where the variable begins storage (memory management) variable name format and length label

4 Stata data dictionary Infile using “dictionary file name”
infile using 612_sample.dct recall that dictionary calls the raw data set

5 IGAP Layout Columns variable description column numbers
number of columns variable description

6 IGAP Layout variable format alphanumeric (strings)
fortran (total columns, how many after decimal) comma (total columns, comma separates thousands) $ (dollar sign, comma separates thousands)

7 Dictionary again Handout - find school enrollment
comma5, sixth column a ; example: 2,345; example: ; Look at the dictionary What did I do to get the variable?

8 IGAP enrollment variable
Senrollt, senrollo, denrollo, denrollt gen senroll=senrollt* senrollo What happens? Replace senrollt=0 if senrollt==. Drop senroll then try again Create denroll

9 IGAP dictionary Write a dictionary to read the data set RC97
Get full record layout from computer lab Download rc97.zip


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