ptvalue 0.2.0
- Multiplication and division between a 
ptvalue() and a
double/integer value is now allowed.
- The output is kept as a 
ptvalue() for now. 
- Multiplication and division of a 
ptvalue() with a
negative value are still not allowed and will raises an error. 
- If multiplication and division with a negative value is needed,
ptvalue() can be converted back to double values with
unclass() or as.double(). 
- Test unit have been added.
 
 
- Other helper functions have been added in addition to
invert_sign():
abs_sign() converts values to values with an ‘absolute’
sign (times or div) 
as_times() converts values to times only 
as_div() converts values to div only 
- Documentation for these four functions have been added and grouped
into a single page.
 
- Test units have been added.
 
 
- More details were added in README:
- About 
div() and times(), for creating
directly PT values. 
- About 
abs_sign(), as_times(), and
as_div() 
 
ptvalue 0.1.0
ptvalue 0.0.0.9000