mongrel73

132 Reputation

4 Badges

14 years, 115 days

MaplePrimes Activity


These are replies submitted by mongrel73

I'm using Maple 11 on Windows vista.

I'm getting really weird results, I've tried it using evalf[3](soln); and this sort of worked; it gave me 0.00175000000000000004, which is rounded from the actual value, but there's that inexplicable 4 at the end! evalf gives it *almost* to 3sf but then adds or subtracts about 10-20 for no apparent reason.

 

Could it be that I'm already within the LinearAlgebra package, and that's messing some numerical things up? By that I mean that instead of writing LinearAlgebra[...] on every line, i wrote with(LinearAlgebra); on the first line of the worksheet. Will I be able to fix this without leaving the LinearAlgebra package?

I'm using Maple 11 on Windows vista.

I'm getting really weird results, I've tried it using evalf[3](soln); and this sort of worked; it gave me 0.00175000000000000004, which is rounded from the actual value, but there's that inexplicable 4 at the end! evalf gives it *almost* to 3sf but then adds or subtracts about 10-20 for no apparent reason.

 

Could it be that I'm already within the LinearAlgebra package, and that's messing some numerical things up? By that I mean that instead of writing LinearAlgebra[...] on every line, i wrote with(LinearAlgebra); on the first line of the worksheet. Will I be able to fix this without leaving the LinearAlgebra package?

ah, I'd never heard of this. This seems to give me 3 decimal places rather than 3 significant figures, and one of the numbers is  -0.00174999999999889480,  so if this comes out as -0.002, it does make quite a big difference. Sorry to be pedantic about a small thing, but it is surprisingly difficult to achieve i'm finding!

ah, I'd never heard of this. This seems to give me 3 decimal places rather than 3 significant figures, and one of the numbers is  -0.00174999999999889480,  so if this comes out as -0.002, it does make quite a big difference. Sorry to be pedantic about a small thing, but it is surprisingly difficult to achieve i'm finding!

Page 1 of 1