Message Boards Message Boards

GROUPS:
Mathematica Algebra Wolfram Language
Daniel Solis

Digit precision with N command when working with machine precision numbers

Daniel Solis, UPIIZ - IPN
Posted 9 years ago
2236 Views
|
3 Replies
|
0 Total Likes
|

I have something like this:

N[Mean[{3.81913, 243.354}], 3]

It outputs

123.587

because the mean of that list is a Machine Precision number and then, N[ ] does nothing. How can I force Mathematica to show the number of digits I want in a case like this one?
POSTED BY: Daniel Solis
3 Replies
Sort By:

SetPrecision[...,3] should do this.
POSTED BY: Daniel Lichtblau

Possibly 

N[Mean[Rationalize@{3.81913, 243.354}], 3]

is one way to go.... when you are working with machine precision numbers then machine precision arithmetic is used throughout the calculation.
POSTED BY: David Reiss

Thanks!, both options worked.
POSTED BY: Daniel Solis
Reply to this discussion
Community posts can be styled and formatted using the Markdown syntax.
Tag limit exceeded
Note: Only the first five people you tag will receive an email notification; the other tagged names will appear as links to their profiles.
Reply Preview
Attachments
Remove
or Discard

Group Abstract Group Abstract