FE515 EViews Topics – Data Management
FE515 EViews Topics – Data ManagementBasic TerminologyNormal DistributionStandard DeviationSkewnessKurtosisRename SeriresGenr – Creating VariablesCalculating Simple Percentage ChangeSummary StatisticsLine GraphSimple Summary Statistics
Basic Terminology
Normal Distribution
The Normal Distribution has:
[mean] = [median] = [mode]
symmetry about the center
50% of values less than the mean and 50% greater than the mean
Standard Deviation
68% of values are within 1 standard deviation of the mean
95% of values are within 2 standard deviations of the mean
99.7% of values are within 3 standard deviations of the mean
Skewness
Kurtosis
Rename Serires
AVERAGE_HOUSE_PRICE HP
Will change the Column name AVERAGE_HOUSE_PRICE to HP
Genr – Creating Variables
Variables of interest can be created in EViews by selecting the Genr button from the workfile toolbar and typing in the relevant formula.
Suppose that we have a time series called Z:
Commonly Used Functions and Operations in EViews:
| Syntax | Description | Syntax | Description |
|---|---|---|---|
Z/2 | devide Z by 2 | Z(-1) | first lag of Z |
Z*2 | multiply Z by 2 | Z(-n) | |
Z^2 | square of Z | d(Z) | first difference of Z (equivalent to |
sqr(Z) | square root of Z | d(Z,n) | |
log(Z) | natural logarithm of Z | dlog(Z) | first difference of the log of Z |
exp(Z) | exponential function of Z | abs(Z) | absolute value of Z |
Other functions that can be used in the formulae includes:
abssincos…
Syntax:
newvariable = function of old variable(s)
Calculating Simple Percentage Change
Syntax: DHP = 100* (HP - HP(-1)) / HP(-1)
which calculated the simple percentage change:
Summary Statistics
Descriptive summary statistics of a series can be obtained by selecting Quick/Series Statistics/Histogram and Stats and typing in the name of the variable (DHP).
which generated:
Line Graph
Then select the series to plot
Then select the graph type:
The rsesults can be printed or saved to the Clipboard
Simple Summary Statistics
First open the Spread Sheet View
Then create Stat Table which contains simple summary statistics
