freq—303
freeze |
Command |
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Creates graph, table, or text objects from a view.
Syntax
Command: freeze(name) object_name.view_command
If you follow the keyword freeze with an object name but no view of the object, freeze will use the default view for the object. You may provide a destination name for the object containing the frozen view in parentheses.
Examples
freeze gdp.uroot(4,t)
creates an untitled table that contains the results of the unit root test of the series GDP.
group rates tb1 tb3 tb6
freeze(gra1) rates.line(m)
show gra1.align(2,1,1)
freezes a graph named GRA1 that contains multiple line graphs of the series in the group RATES, realigns the individual graphs, and displays the resulting graph.
freeze(mygra) gra1 gra3 gra4
show mygra.align(2,1,1)
creates a graph object named MYGRA that combines three graph objects GRA1, GRA2, and GRA3, and displays MYGRA in two columns.
Cross-references
See “Object Commands” on page 6. See also Chapter 4, “Object Basics”, on page 71 of the User’s Guide for further discussion of objects and views of objects. Freezing graph views is described in “Creating Graphs” on page 413 of the User’s Guide.
freq |
Alpha View | Group View | Series View |
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Compute frequency tables.
When used as a series view (or for a group containing a single series), freq performs a one-way frequency tabulation. The options allow you to control binning (grouping) of observations.
304—Appendix B. Command Reference
When used with a group containing multiple series, freq produces an N-way frequency tabulation for all of the series in the group.
Syntax
Object View: |
object_name.freq(options) |
Options
Options common to both one-way and N-way frequency tables
dropna (default) |
[Drop/Keep] NA as a category. |
/ keepna |
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v=integer |
Make bins if the number of distinct values or categories |
(default=100) |
exceeds the specified number. |
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nov |
Do not make bins on the basis of number of distinct |
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values; ignored if you set “v=integer.” |
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a=number |
Make bins if average count per distinct value is less |
(default=2) |
than the specified number. |
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noa |
Do not make bins on the basis of average count; |
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ignored if you set “a=number.” |
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b=integer |
Maximum number of categories to bin into. |
(default=5) |
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n, obs, count |
Display frequency counts. |
(default) |
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nocount |
Do not display frequency counts. |
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p |
Print the table. |
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Options for one-way tables
total (default) / |
[Display / Do not display] totals. |
nototal |
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pct (default) / |
[Display / Do not display] percent frequencies. |
nopct |
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cum (default) / |
(Display/Do not) display cumulative frequency counts/ |
nocum |
percentages. |
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Options for N-way tables
table (default) |
Display in table mode. |
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list |
Display in list mode. |
freq—305
rowm (default) / |
[Display / Do not display] row marginals. |
norowm |
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colm (default) / |
[Display / Do not display] column marginals. |
nocolm |
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tabm (default) / |
[Display / Do not display] table marginals—only for |
notabm |
more than two series. |
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subm (default) / |
[Display / Do not display] sub marginals—only for “l” |
nosubm |
option with more than two series. |
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full (default) / |
(Full/Sparse) tabulation in list display. |
sparse |
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totpct / nototpct |
[Display / Do not display] percentages of total observa- |
(default) |
tions. |
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tabpct / notab- |
[Display / Do not display] percentages of table observa- |
pct (default) |
tions—only for more than two series. |
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rowpct / norow- |
[Display / Do not display] percentages of row total. |
pct (default) |
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colpct / nocolpct |
[Display / Do not display] percentages of column total. |
(default) |
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exp / noexp |
[Display / Do not display] expected counts under full |
(default) |
independence. |
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tabexp / nota- |
[Display / Do not display] expected counts under table |
bexp (default) |
independence—only for more than two series. |
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test (default) / |
[Display / Do not display] tests of independence. |
notest |
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Examples
hrs.freq(nov,noa)
tabulates each value (no binning) of HRS in ascending order with counts, percentages, and cumulatives.
inc.freq(v=20,b=10,noa)
tabulates INC excluding NAs. The observations will be binned if INC has more than 20 distinct values; EViews will create at most 10 equal width bins. The number of bins may be smaller than specified.
group labor lwage gender race
306—Appendix B. Command Reference
labor.freq(v=10,norowm,nocolm)
displays tables of LWAGE against GENDER for each bin/value of RACE.
Cross-references
See “One-Way Tabulation” on page 323 and “N-Way Tabulation” on page 379 of the User’s Guide for a discussion of frequency tables.
frml |
Command || Object Declaration (Alpha) | Object Declaration (Series) |
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Declare a series object with a formula for auto-updating, or specify a formula for an existing series.
Syntax
Command: frml series_name = series_expression
Command: frml series_name = @clear
Follow the frml keyword with a name for the object, and an assignment statement. The special keyword “@CLEAR” is used to return the auto-updating series to an ordinary numeric or alpha series.
Examples
To define an auto-updating numeric or alpha series, you must use the frml keyword prior to entering an assignment statement. The following example creates a series named LOW that uses a formula to compute its values.:
frml low = inc<=5000 or edu<13
The auto-updating series takes the value 1 if either INC is less than or equal to 5000 or EDU is less than 13, and 0 otherwise, and will be re-evaluated whenever INC or EDU change.
If FIRST_NAME and LAST_NAME are alpha series, then the formula declaration:
frml full_name = first_name + " " + last_name
creates an auto-updating alpha series FULL_NAME.
You may apply a frml to an existing series. The commands:
series z = 3
frml—307
frml z =(x+y)/2
makes the previously created series Z an auto-updating series containing the average of series X and Y. Note that once a series is defined to be auto-updating, it may not be modified directly. Here, you may not edit Z, nor may you generate values into the series.
Note that the commands :
series z = 3
z = (x+y)/2
while similar, produce quite different results, since the absence of the frml keyword in the second example means that EViews will generate fixed values in the series instead of defining a formula to compute the series values. In this latter case, the values in the series Z are fixed, and may be modified.
One particularly useful feature of auto-updating series is the ability to reference series in databases. The command:
frml gdp = usdata::gdp
creates a series called GDP that obtains its values from the series GDP in the database USDATA. Similarly:
frml lgdp = log(usdata::gdp)
creates an auto-updating series that is the log of the values of GDP in the database USDATA.
To turn off auto-updating for a series or alpha, you should use the special expression “@CLEAR” in your frml assignment. The command:
frml z = @clear
sets the series to numeric or alpha value format, freezing the contents of the series at the current values.
Cross-references
See “Auto-Updating Series” on page 147 of the User’s Guide.
See also link (p. 338).