computation speed: C vs MATLAb

lahjenan — Thu, 03 Jul 2008 22:18:06 +0800

sesiapa biasa dengan heuristics @ search algorithms? nk tanya pendapat korg, yg mana lg pantas utk selesaikan heuristic algorithms, sama ada C atau MATLAB, dan kenapa?
agak2nya, C lg pantas, tp aku x biasa dgn MATLAB & tak tau kesesuaian penggunaan MATLAB.

need help with awk @ sed;

lahjenan — Mon, 29 Oct 2007 23:57:36 +0800

I would like to read a file name tmpACO.txt, and check for each line, whether the item in column i has the same value as the item in column 8. If the item i has the same value as the item in the 8th column, I want to print a bold "y" marker before the item and print the item in bold. If the item i is different from the item in the 8th column, I want to print the item i normally, and reprint the results in a file named markedACO.txt.

CODE

cat tmpACO.txt | awk -F' ' '{for(i = 1; i < 8; i++) {if($i == $8) $i = "y "$i; else $i = $i} print}' > markedACO.txt

below are a few lines from file tmpACO.txt;

kra30a.dat 0.02 0.89 0.1 0.02 0.01 0.29 0.01
kra30b.dat 0.13 0.9 0.14 0.54 1.2 2.1 0.13
kra32.dat 0.1 0.18 0.14 0.87 0.2 1.22 0.1

the output should be like this;

kra30a.dat 0.02 0.89 0.1 0.02 y 0.01 0.29 0.01
kra30b.dat y 0.13 0.9 0.14 0.54 1.2 2.1 0.13
kra32.dat y 0.1 0.18 0.14 0.87 0.2 1.22 0.1

thanks

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computation speed: C vs MATLAb

need help with awk @ sed;