Changes between Version 33 and Version 34 of DataParallel/Replicate


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Timestamp:
Aug 16, 2011 1:18:03 PM (3 years ago)
Author:
chak
Comment:

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  • DataParallel/Replicate

    v33 v34  
    116116vsegs: [:0, 0, 0:] 
    117117pstart: [:0:] 
    118 plen:   [ 3:] 
     118plen:   [:3:] 
    119119data:  [:1, 2, 3:]) 
    120120}}} 
     
    129129will now be 
    130130{{{ 
    131 start: [:0, 0, 1, 1, 1:] 
    132 len:   [:2, 1:] 
     131vsegs: [:0, 0, 1, 1, 1:] 
     132pstart: [0, 2:] 
     133plen:  [:2, 1:] 
    133134data:  [:1, 2, 3:]) 
    134135}}} 
     
    152153With overlapping segments, we have 
    153154{{{ 
    154 (as_start, as_len, as_data) !:^ is = bpermutePA as_data (as_start +^ is) 
    155 }}} 
    156 In the case of `smvm`, where the first argument is produced by `replicatePA (lengthPA row) v`, we have `as_start = replicatePA (lengthPA row) 0` and `as-data = v`.  In other words, lifted indexing draws from a single copy of `v`, which is what we wanted. 
     155(as_vsegs, as_pstart, as_plen, as_data) !:^ is = bpermutePA as_data (bpermutePA as_start as_vsegs +^ is) 
     156}}} 
     157In the case of `smvm`, where the first argument is produced by `replicatePA (lengthPA row) v`, we have `as_vsegs = replicatePA (lengthPA row) 0` and `as-data = v`.  In other words, lifted indexing draws from a single copy of `v`, which is what we wanted. 
    157158 
    158159=== Reduction ===