stata4.key

是一个经济学管理应用软件 很难找的 但是经济学学生又必须用到

		FAQS/data/leapyear.html

.e FAQ
.c faq
.t Problems with reshape
.a N. J. Cox
.k data-sets set-s manage-ment reshape wide long reorganize
.k xpose unab name-s
.x
	12/03	I am having problems with the reshape command. Can
		you give further guidance?
		FAQS/data/reshape3.html

.e FAQ
.c faq
.t Malformed end-of-line sequence
.a J. Hassell
.k data-sets set-s manage-ment infile miss-ing value-s row-s
.k end line-s hex-dump dump anal-yze anal-ysis file-filter
.k filter-s file-s
.x
	12/03	Why do I get rows of missing data when I use infile?
		FAQS/data/miss_data.html

.e FAQ
.c faq
.t Dropping spells of missing values
.a N. J. Cox
.k value-s miss-ing drop panel-s data-sets set-s
.k sort manage-ment spell-s
.x
	9/03	How can I drop spells of missing values at the
		beginning and end of panel data?
		FAQS/data/dropmiss.html

.e FAQ
.c faq
.t Converting other format files into Stata dataset files
.a S. Driver
.k data-sets set-s manage-ment infile infix insheet format-s ascii text
.k import-ing transfe-rring statt-ransfer spread-sheets odbc convert-ing
.k format file-s dta .dta read-ing input-ting input-ing convers-ion dbmscopy
.x
	5/03	How can I convert other packages' files to Stata
		format data files?
		FAQS/data/convert2.html

.e FAQ
.c faq
.t Configuring ODBC for Mac and Linux
.a K. S. Turner
.k data-sets set-s manage-ment odbc iodbc mac-intosh linux dsn-s source name-s
.k driver-s manager database base
.x
	4/03	How do I set up an ODBC Data Source Name for Stata
		on Mac or Linux?
		FAQS/data/odbcmu.html

.e FAQ
.c faq
.t Making ^foreach^ go through all values of a variable
.a N. J. Cox
.k data-sets set-s manage-ment for-each each for-values value-s loop-s
.k loop-ing repeat-ing command-s iter-ate list-s level-s var-iables
.x
	4/03	Is there a way to tell Stata to try all values of a
		particular variable in a @foreach@ statement without
		specifying them?
		FAQS/data/foreach.html

.e FAQ
.c faq
.t The ^destring^ command
.a N. J. Cox
.k data-sets set-s manage-ment destring str-ings encode
.x
	3/03	Why doesn't the @destring@ command in Stata include
		an ^encode^ option?
		FAQS/data/destring.html

.e FAQ
.c faq
.t Using the STATATMP environment variable
.a P. Huckelba
.k data-sets set-s manage-ment rc 699 r(699) disk-s space dir-ectory
.k temp-orary tmpdir statatmp
.x
	2/03	Why am I getting an error message that there is
		"insufficient disk space"?
		FAQS/data/statatmp.html

.e FAQ
.c faq
.t Handling date information when numbers are in a continuous sequence
.a D. Reichel
.k data-sets set-s date-s mdy elap-sed format-s
.x
	2/03	How do I convert date variables into Stata elapsed
		dates when the numbers run together, like 4151999?
		FAQS/data/dateseq.html

.e FAQ
.c faq
.t Changing the default memory setting
.a W. Gould
.k data-sets set-s manage-ment mem-ory max-imums size limit-s stor-age default
.x
	2/03	Each morning I have to set my memory size to, say,
		20m.  The default, 1m, is not sufficient for my data.
		Is there a way of changing the default setting?
		FAQS/data/setmemory1.html

.e FAQ
.c faq
.t True and false in Stata
.a N. J. Cox
.k data-sets set-s manage-ment boolean true false logic-al
.x
	2/03	What is true and false in Stata?
		FAQS/data/trueorfalse.html

.e FAQ
.c faq
.t Creating variables recording whether any or all possess some char.
.a N. J. Cox
.k data-sets set-s var-iables all any member-ship group-s egen gen-erate
.k create
.x
	2/03	How do I create a variable recording whether any
		members of a group (or all members of a group)
		possess some characteristic?
		FAQS/data/anyall.html

.e FAQ
.c faq
.t Creating dummy variables
.a W. Gould
.k data-sets set-s manip-ulation dum-my var-iables creat-e dum-mies indica-tor
.x
	2/03	How do I create dummy variables?
		FAQS/data/dummy.html

.e FAQ
.c faq
.t Using a value label multiple times
.a P. Lin
.k data-sets set-s manip-ulation value-s label-s
.x
	2/03	Can I apply the ^label values^ command to more than one variable
		at once?  I want to attach the same value labels to several
		variables.
		FAQS/data/label.html

.e FAQ
.c faq
.t Results of the mod(x,y) function
.a N. J. Cox and T. J. Steichen
.k data-sets set-s manage-ment mod-ulus func-tions precis-ion
.x
	2/03	Why does the mod(x,y) function sometimes give
		puzzling results?
		Why is mod(0.3,0.1) not equal to 0?
		FAQS/data/mod.html

.e FAQ
.c faq
.t Logical expressions and missing values
.a W. Gould
.k data-sets set-s manip-ulation expr-essions miss-ing value-s logic-al
.k boolean if
.x
	2/03	Why is x > 1000 true when x contains missing value?
		FAQS/data/values.html

.e FAQ
.c faq
.t Keeping the same variable labels with ^collapse^
.a N. J. Cox
.k data-sets set-s manage-ment collapse var-iables label-s
.x
	2/03	How can I collapse my dataset and keep the same
		variable labels?
		FAQS/data/variables.html

.e FAQ
.c faq
.t Saving one or more parts of a dataset
.a P. Seed, N. J. Cox, and J. M. Linhart
.k data-sets set-s manage-ment sav-ed use load read writ-e writ-ing restore
.k file-s sav-ing delete remov-e subset-s drop keep var-iables obs-ervations
.x
	2/03	How can I save one or more parts of a large dataset?
		FAQS/data/savesome.html

.e FAQ
.c faq
.t Multiple operations on data records
.a D. Kantor
.k data-sets set-s manage-ment if cond-itions state-ment
.x
	2/03	How do I perform multiple operations on data records
		if a condition is met?
		FAQS/data/condition.html

.e FAQ
.c faq
.t Expanding datasets to all possible pairs
.a N. J. Cox
.k data-sets set-s manage-ment expand all pair-s
.x
	2/03	How do I produce a dataset based on all possible
		pairs of identifiers within each group?
		FAQS/data/pairs.html

.e FAQ
.c faq
.t Variable arrays in Stata
.a W. Gould
.k data-sets set-s sas array-s var-iables
.x
	2/03	How do I implement SAS-like ARRAYs in Stata?
		FAQS/data/arrays.html

.e FAQ
.c faq
.t Replacing missing values
.a N. J. Cox
.k data-sets set-s miss-ing value-s previous following replace cascade
.k cascad-ing nonmiss-ing non
.x
	2/03	How can I replace missing values with previous or
		following nonmissing values?
		FAQS/data/missing.html

.e FAQ
.c faq
.t Current date and time
.a J. Wernow and D. Kantor
.k data-sets set-s date-s time-s stamp-s s_time s_date log-s datetime
.x
	2/03	How can I put the current date and time in my log files?
		FAQS/data/dateandtime.html

.e FAQ
.c faq
.t Calculating variables containing weighted group summary statistics
.a N. J. Cox and S. P. Jenkins
.k data-sets set-s manage-ment stat-istics summ-ary weight-ed weight-se group-s
.x
	1/03	I want to calculate a variable containing weighted
		group summary statistics, but I do not want to
		collapse the data and ^egen^ does not support weights.
		How can I do this?
		FAQS/data/weighted.html

.e FAQ
.c faq
.t Identifying runs of consecutive observations in panel data
.a N. J. Cox and V. Wiggins
.k data-sets set-s manage-ment gap-s run-s panel-s cross section-al
.k time-series series xt tsspell
.x
	8/02	How do I identify runs of consecutive observations
		in panel data?
		FAQS/data/panel.html

.e FAQ
.c faq
.t Selecting a subset of observations with a complicated criterion
.a N. J. Cox
.k data-sets set-s manage-ment selec-tion subset-s group-s
.x
	7/02	How do I select a subset of observations using a
		complicated criterion?
		FAQS/data/selectid.html

.e FAQ
.c faq
.t Converting other format files into Stata dataset files
.a N. J. Cox
.k data-sets set-s excel transfe-r read-ing input-ting input-ing spread-sheets
.x
	7/02	How do I get information from Excel into Stata?
		FAQS/data/newexcel.html

.e FAQ
.c faq
.t Number of distinct observations
.a N. J. Cox and G. Longton
.k data-sets set-s manage-ment distinct uniq-ue obs-ervations value-s count-s
.k num-bers
.x
	4/02	How do I compute the number of distinct observations?
		FAQS/data/distinct.html

.e FAQ
.c faq
.t Tabulating cumulative frequencies
.a N. J. Cox
.k data-sets set-s manage-ment tabl-es tab-ulate tab-ulations freq-uencies
.k freq-uency cumul-ative
.x
	2/02	How do I tabulate cumulative frequencies?
		FAQS/data/tabdisp.html

.e FAQ
.c faq
.t Dealing with very large datasets
.a K. Hernandez
.k data-sets set-s manage-ment merge
.x
	2/02	How do you process very large datasets in Stata?
		FAQS/data/dataset.html

.e FAQ
.c faq
.t Numeric variables input as string
.a N. J. Cox
.k data-sets set-s manage-ment str-ings var-iables num-erical
.x
	2/02	Stata is reading in my variables as string, whereas
		they should be numeric. What should I do?
		FAQS/data/allstring.html

.e FAQ
.c faq
.t Splitting a string variable into parts
.a N. J. Cox
.k data-sets set-s manage-ment str-ings var-iables split
.x
	2/02	How do I split a string variable into parts?
		FAQS/data/splitstr.html

.e FAQ
.c faq
.t Defining group characteristics to create subsets
.a C. F. Baum
.k data-sets set-s manage-ment merge comb-ine join match subset-s group-s
.x
	12/01	How do you efficiently define group characteristics
		in your data in order to create subsets?
		FAQS/data/characteristics.html

.e FAQ
.c faq
.t Listing observations in a group that differ on a variable
.a N. J. Cox
.k data-sets set-s manage-ment obs-ervations list group-s diff-er
.x
	11/01	How do I list observations in a group that differ
		on a variable?
		FAQS/data/diff.html

.e FAQ
.c faq
.t Current date and time
.a J. Wernow and D. Kantor
.k data-sets set-s date-s time-s stamp-s s_time s_date log-s datetime
.x
	2/03	How can I put the current date and time in my log files?
		FAQS/data/dateandtime.html

.e FAQ
.c faq
.t Creating variables that are "plurality" measures
.a N. J. Cox
.k data-sets set-s manage-ment gen-erate var-iables plural-ity meas-ures
.x
	6/01	How do I calculate measures such as percent improved
		minus percent deteriorated?
		FAQS/data/measures.html

.e FAQ
.c faq
.t The accuracy of the float data type
.a W. Gould
.k data-sets set-s manage-ment accur-acy precis-ion float-s stor-age digit-s
.x
	5/01	How many significant digits are there in a float?
		FAQS/data/prec.html

.e FAQ
.c faq
.t Allocating memory in Stata
.a J. Wernow
.k data-sets set-s mem-ory size limit-s increase set obs-ervations max-imums
.x
	3/01	Why do I get the error message "no room to add more
		observations"?
		FAQS/data/setmemory.html

.e FAQ
.c faq
.t Creating group identifiers
.a N. J. Cox and W. Gould
.k data-sets set-s group-s identifier-s var-iables egen gen-erate id-s
.x
	3/01	How do I create individual identifiers numbered
		from 1 upwards?
		FAQS/data/group.html

.e FAQ
.c faq
.t Comparing floating-point values (the float function)
.a J. Wernow
.k data-sets set-s precis-ion float-s compar-e compar-isons equal-ity
.x
	3/01	Why can't I compare two values that I know are equal?
		FAQS/data/float.html

.e FAQ
.c faq
.t Accumulating results from immediate commands
.a N. J. Cox
.k data-sets set-s immed-iate command-s result-s accum-ulate accum-ulating
.x
	3/01	How do I accumulate the results of immediate commands?
		FAQS/data/results.html

.e FAQ
.c faq
.t Encoding a string variable
.a J. Hardin
.k data-sets set-s encod-ing encod-e str-ings var-iables obs-ervations no
.x
	3/01	Why does the command complain that there are no observations?
		FAQS/data/encode.html

.e FAQ
.c faq
.t Setting different observations equal
.a J. Wernow
.k data-sets set-s obs-ervations set-ting in
.x
	6/00	How can I replace an observ