Precision problem in log()

2011 4 13
1 个回答
9 次查看（30 天）

0 个投票

Hello! I am using MATLAB for calculating Lyapynov exponent for dynamical system. I need a very hight precision for this calculations. I use vpa() function: vpa('log(some_value_in_my_precision)',my_precision ); my_precision = 5000 or it can be more. Mean it's that a logarithm will be calculated with this precision? Is it possible to calculate the logarithm with hight precision? Thanks.

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回答（1 个）

the cyclist
the cyclist 2011-4-13

0 个投票

I have not used the symbolic math toolbox myself, but according to this page:
http://www.mathworks.com/help/toolbox/symbolic/vpa.html,
vpa will accept the second argument as large as 2^29+1.

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Tarapun
Tarapun
2011-4-13

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