Simplifying numbers in symbolic function

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David H
David H 2014-4-30
评论： Kyle Langford 2022-2-18
Upon substituting into a symbolic expression I get very long analytic expressions for numbers, e.g. (2^(1/2)*(3^(1/2)*pi*(5^(1/2)/4 - 1/4)*(1/120000 + i/6000000)t + .... is there any way to simplify these numbers down to a single double precision complex number in the symbolic expression to make for easier viewing? I can't just use double (expression) as it still have a symbolic variable.
Many thanks.
David

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Mischa Kim
Mischa Kim 2014-4-30
编辑：Mischa Kim 2014-4-30
David, have you tried vpa(expr)?
syms x t
x = 2^(1/2)*3^(1/2)*pi*(5^(1/2)/4 - 1/4)*(1/120000 + i/6000000)*t;
vpa(x,10) % you can adjust the number of significant digits
ans =
t*(0.00001981648468 + 0.0000003963296937*i)

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