generate may be abbreviated by gen or even g and can be used with the following mathematical operators and functions:
+addition-subtraction*multiplication/division^power
A large number of functions is available. Here are some examples:
abs(x)absolute value of xexp(x)antilog of xint(x) or trunc(x)truncation to integer valueln(x), log(x)natural logarithm of xround(x)rounds to the nearest integer of xround(x,y)x rounded in units of y (i.e., round(x,.1) rounds to one decimal place)sqrt(x)square root of xruniform()returns uniformly distributed numbers between 0 and nearly 1rnormal()returns numbers that follow a standard normal distributionrnormal(x,y)returns numbers that follow a normal distribution with a mean of x and a s.d. of y
egen
A number of more complex possibilities have been implemented in the egen command like in the following examples:
egen nkids = anycount(pers1 pers2 pers3 pers4 pers5), value(1)egen v323r = rank(v323)egen myindex = rowmean(var15 var17 var18 var20 var23)egen nmiss = rowmiss(x1-x10 var15-var23)egen nmiss = rowtotal(x1-x10 var15-var23)egen incomst = std(income)bysort v3: egen mincome = mean(income)
Detailed usage explanations can be found at this link.
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