Bill: thank you for this useful work-around. Could someone please explain why the original conversion does not work?
Kindly, Mark. On 07/31/2015 04:35 AM, Bill Page wrote: > You could use this as a work-round: > > (1) -> interpret(eval(integrate(x*exp(-(x-u)^2/2)/(sqrt(2*%pi)), > x=a..%plusInfinity), [a=1,u=0.5])::InputForm) > > On 30 July 2015 at 22:23, Leon Baum <[email protected]> wrote: >> Why can't doesn't the following produce a numerical result? >> >> (71) -> eval(integrate(x*exp(-(x-u)^2/2)/(sqrt(2*%pi)), x=a..%plusInfinity), >> [a=1,u=0.5]) >> >> (71) - 0.25 erf(0.3535533905_932737622) + 0.6020653267_6429947778 >> Type: >> Expression(Float) >> (72) -> eval(integrate(x*exp(-(x-u)^2/2)/(sqrt(2*%pi)), x=a..%plusInfinity), >> [a=1,u=0.5])::Float >> >> Cannot convert the value from type Expression(Float) to Float . >> >> >> If I type the expression in manually, it works: >> >> >> >> (72) -> -0.25*erf(0.3535533905_932737622) + 0.6020653267_6429947778 >> >> (72) 0.5063340961_2729292596 >> Type: >> Float >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "FriCAS - computer algebra system" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/fricas-devel. >> For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/fricas-devel. For more options, visit https://groups.google.com/d/optout.
