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2010 Aug 03
4
mixing strings and numeric doubles in an array
I have an array called "stocks" which contains numeric dates, ticker
symbols,prices, etc.
> stocks[1:3,]
DATE TICKER PERMNO EXCHCD TSYMBOL TRDSTAT SHROUT PRC
RET
1 19950131 EWST 10001 3 EWST A
2224 -7.75000 -0.031250
2 19950228 EWST 10001 3 EWST A
2224 7.54688 -0.026210
3 19950331 EWST 10001 3 EWST A
2244 7.50000 0.006377...