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How to keep my real numbers rounded

asked 2015-11-09 11:44:41 -0600

Erel Segal-Halevi gravatar image

The following code:

var('t')
test(x) = e^(x * t)
test(0.326)

gives:

e^(0.326000000000000*t)

For some reason, Sage converted my "0.326" to "0.326000000000000".

I want to keep the number rounded. i.e:

e^(0.326*t)

I don't even care if Sage rounds it like this:

e^(0.33*t)

How can I do this?

I know it is possible to use fractions, E.g, I can use "326/1000" instead of "0.326", but this doesn't look good. All I want is that the floating point numbers remain rounded.

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answered 2015-11-09 12:10:52 -0600

FrédéricC gravatar image

Maybe like that

sage: myR=RealField(12)
sage: var('t')
t
sage: test(x) = e^(x * t)
sage: test(myR(0.326))
e^(0.326*t)
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OK. So I have to convert each real number to the field "real number with 12 bit precision"?

Erel Segal-Halevi gravatar imageErel Segal-Halevi ( 2015-11-11 11:43:53 -0600 )edit

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Asked: 2015-11-09 11:44:41 -0600

Seen: 71 times

Last updated: Nov 09 '15