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how to do some evaluation in quadruple precision arithmetic

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Vicky
Vicky 2013-2-19
回答： Pavel Holoborodko 2014-7-23
hi. im using Matlab version 7.9.0.(R2009b) and i would like to do some evaluations with unit roundoff u=2.5*10^32, that is in quadruple precision arithmetic. How can i do that or what should i change? thank you.

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Sean de Wolski
Sean de Wolski 2013-2-19
Either use VPA in the Symbolic Math Toolbox or John's HPF class:
http://www.mathworks.com/matlabcentral/fileexchange/36534-hpf-a-big-decimal-class

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Pavel Holoborodko
Pavel Holoborodko 2014-7-23
Or try Advanpix toolbox if you need high-speed quadruple precision.

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