Matrix expressions - Stata
carefully, you can derive the rules for yourself. invsym() (inversion) is much like transposition, so row and column names must be swapped. Here, however, the matrix was symmetric, so that amounted to leaving the names as they were. Multiplication amounts to taking the column names of the first matrix and the row names of the second.
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Syntax - Stata
www.stata.com2cluster kmeans and kmedians— Kmeans and kmedians cluster analysis Options Main k(#) is required and indicates that # groups are to be formed by the cluster analysis.
Syntax Description - Stata
www.stata.com2substr()— Extract substring Diagnostics In substr(s, b, l) and substr(s, b), if b describes a position before the beginning of the string or after the end, "" is returned.
Title stata.com generate — Create or change …
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www.stata.commacro— Macro definition and manipulation 3 Macro extended functions related to matrices rownamesjcolnamesjrowfullnamesjcolfullnames matname roweqjcoleq
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Title stata.com putexcel — Export results to an Excel …
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Title stata.com gettoken — Low-level parsing
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