prdk_day2b

prdk_day2b - A d v a n c e d P r o g r a m m i n g i n Q u...

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Unformatted text preview: A d v a n c e d P r o g r a m m i n g i n Q u a n t i t a t i v e E c o n o m i c s Introduction, structure, and advanced programming techniques 17 – 21 August 2009, Aarhus, Denmark Charles Bos [email protected] VU University Amsterdam Tinbergen Institute Advanced Programming in Quantitative Economics – p. 1 Tutorial Day 2 - Afternoon 14.30P Tutorial ◦ Exercises HB ◦ Data duration model 16.00 End Advanced Programming in Quantitative Economics – p. 2 Rows or columns Does it make a difference to use rows or columns, for the speed of your program? Find this out... • Make a program which fills a n x n matrix with random numbers. • Do this either 1. at once, using rann(iN, iN); 2. filling mX row by row, mX[i][]= rann(1, iN); 3. filling mX column by column, mX[][i]= rann(iN, 1); • Measure the time each of these takes. Use the dTime= timer(); and println (timespan(dTime)); to measure. • If your computer is too quick, repeat the filling say S = 10 or S = 1000 times, or more, until you see which one works better....
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prdk_day2b - A d v a n c e d P r o g r a m m i n g i n Q u...

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