Thanks to Kit Baum, an update to the -moremata- package
is available from SSC.
-moremata- provides various Mata functions.
To install the update, type
. ssc install moremata, replace
or, if -moremata- is already installed,
. adoupdate moremata, update
New functions:
o mm_bs(): perform bootstrapping in Mata
o mm_jk(): perform jackknifing in Mata
o mm_polint(): polynomial interpolation
o mm_root(): Brent's univariate zero (root) finder
o mm_nrroot(): Newton-Raphson zero (root) finder
o mm_finvert(): univariate function inverter
o mm_locate(), mm_hunt(): locate position in an ordered
vector
o mm_expand(), mm_repeat(): duplicate contents of a
matrix
o mm_callf(): a programmers tool to pass optional
arguments to functions within functions
o mm_nobs(): shortcut to determine the number
observations or sum of weights depending on context
o mm_mse(), mm_sse(): shortcut to compute mean squared
error and the sum of squared errors
o mm_kern(), mm_kint(): various kernel functions and
their integrals
Changes to existing functions:
o mm_quantile(): new -altdef- argument to compute the
quantiles using a linear interpolation formula; great
speed improvements for unweighted data; the -p-
argument is optional now (the default for p is
(0,.25,.5,.75,1)); -p- may be a matix now.
o The -w- argument (weights) is optional now in
mm_quantile(), mm_iqrange(), mm_median(), mm_ecdf(),
mm_ranks(), mm_freq(), mm_gini(), and mm_histogram().
o The -g- argument (interval boundaries) is optional
now in mm_histogram().
o The default for -m- in makegrid() is now 512.
o Slight changes have been made to the output produced
by mm_panels().
o The -fw- argument has been deleted from mm_linbin(),
mm_fastlinbin(), and mm_exactbin()
o q in relrank(x,w,q) may now be matrix
o mm_rank() now hat a -ties=4- option to order ties
according to size of weights
ben
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
