Initializing help system before first use

Rsetdf

Purpose
Assign a Mosel array to an R data.frame object.
Synopsis
procedure Rsetdf(dst:string, arr:array of boolean|integer|real|string)
Synopsis
procedure Rsetdf(dst:string, arr:array of boolean|integer|real|string, cname:list of string)
Arguments
dst 
An R variable name
arr 
The Mosel array to be assigned to dst
cname 
List of names to be assigned to the data.frame columns
Example
The following: 
 declarations
  CITIES = {"LONDON", "NEW YORK", "ROME"}
  ZONES = 1..4
  myarray: dynamic array(ZONES, CITIES) of integer
 end-declarations
 myarray(1,'LONDON') := 8
 myarray(1,'ROME') := 3
 myarray(2,'NEW YORK') := 9
 Rsetdf("a_df", myarray, ['Zone','City','Value'])
 Rprint("a_df")
produces this output: 
  Zone     City Value
1    1   LONDON     8
2    1     ROME     3
3    2 NEW YORK     9
Further information
1. A new R data.frame is created from arr and assigned to dst
2. The argument dst can represent any assignable expression (including subsetting and attributes).
3. The R data.frame is constructed with n+1 columns (where n is the number of dimensions of arr): one column for each of the array's indices, plus one column for the array's values; and one row for each existing value of the array.
4. Rows are numbered from 1 to the number of existing values of arr and column names are taken from the cname argument, when given.
5. Only the first n+1 strings from cname are used; if cname is shorter, then the right-most columns are left unnamed.
Related topics
Reval, Rset.

Parent Topic Procedures and functions

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