search for: indextrow

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2012 Jul 03
1
remove loop which compares row i to row i-1
I would like to remove a loop to speed up my code. I want to remove a loop which references the last row. In general I want to a remove a loop which looks something like this: for 2 to number of rows in a matrix do{ if indextrow-1 is < currentIndexRow then do something. } My R code: for (i in 2:length(tUnitsort$Hour)){ ifelse(tUnitsort[i,4]>=tUnitsort[i-1,4],(tempMC =tUnitsort[i,7]),tempMC ) #col. 4 = BlockNumber; note tests to see if the offers have change to the next set of blocks. ifelse(tUnit...