ndwarshuis
/
org-mode
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Improve documentation on calc accuracy in tables 

Patch by Michael Brand
This commit is contained in:
Carsten Dominik 2010-03-03 13:19:43 +01:00
parent 38f1b209d4
commit 463d60c57b
1 changed files with 15 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
doc/org.texi
View File

@ -2129,8 +2129,11 @@ compact. The default settings can be configured using the variable
@code{org-calc-default-modes}.
@example
p20 @r{switch the internal precision to 20 digits}
n3 s3 e2 f4 @r{normal, scientific, engineering, or fixed display format}
p20 @r{set the internal Calc calculation precision to 20 digits}
n3 s3 e2 f4 @r{Normal, scientific, engineering, or fixed}
@r{format of the result of Calc passed back to Org.}
@r{Calc formatting is unlimited in precision as}
@r{long as the Calc calculation precision is greater.}
D R @r{angle modes: degrees, radians}
F S @r{fraction and symbolic modes}
N @r{interpret all fields as numbers, use 0 for non-numbers}
@ -2140,8 +2143,16 @@ L @r{literal}
@end example
@noindent
In addition, you may provide a @code{printf} format specifier to
reformat the final result. A few examples:
Unless you use large integer numbers or high-precision-calculation
and -display for floating point numbers you may alternatively provide a
@code{printf} format specifier to reformat the Calc result after it has been
passed back to Org instead of letting Calc already do the
formatting@footnote{The @code{printf} reformatting is limited in precision
because the value passed to it is converted into an @code{integer} or
@code{double}. The @code{integer} is limited in size by truncating the
signed value to 32 bits. The @code{double} is limited in precision to 64
bits overall which leaves approximately 16 significant decimal digits.}.
A few examples:
@example
$1+$2 @r{Sum of first and second field}