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The "WR" in my name has nothing to do with the company that develops Mathematica.


Jul
27
answered Dataset with no members
Jul
27
comment Error changing Dataset using Part
Examples such as these are sure to increase the fun factor for the WRI employees working to compile the Query language into SQL ;)
Jul
27
answered Error changing Dataset using Part
Jul
26
comment Converting datasets to nested lists
+1 You could reduce the SP[...][...] expression to SP[GroupBy[Key["SNO"]], KeyDrop["SNO"] /* Values].
Jul
26
comment Converting datasets to nested lists
@Murta +1 you could use: List @@@ Normal @ Normal @ SP[GroupBy[Key["SNO"] -> ({#PNO, #QTY} &)]] to eliminate the "SNO" key.
Jul
26
comment AssociationMap to query Dataset across levels?
Okay, I think I finally see what you are after -- fingers crossed :). Please see my all-new response.
Jul
26
revised AssociationMap to query Dataset across levels?
all-new response using `Query`
Jul
26
awarded  Enlightened
Jul
26
awarded  Nice Answer
Jul
26
revised Geographic background containing both outlines and contours: how?
the options were reversed from their titles
Jul
26
revised Geographic background containing both outlines and contours: how?
added the screenshot that shows the mismatch between the point and polygon coordinates
Jul
26
answered Geographic background containing both outlines and contours: how?
Jul
25
revised AssociationMap to query Dataset across levels?
added the inline version of `baz`
Jul
25
revised AssociationMap to query Dataset across levels?
minor code cliean-up for `baz`
Jul
25
revised AssociationMap to query Dataset across levels?
fixed a typo
Jul
25
comment AssociationMap to query Dataset across levels?
Please see the new section in my response, "starting from titanicClass".
Jul
25
revised AssociationMap to query Dataset across levels?
added the section "starting from titanicClass"
Jul
25
answered AssociationMap to query Dataset across levels?
Jul
24
comment Mathematica 10 : Where is the Mathematica Book?
This is a duplicate of Where (have) the “Function Navigator” and “Virtual Book” gone?.
Jul
23
answered Populate an upper triangular matrix from a vector of elements