maple : how to extract the data.

Question

while doing optimization in MAPLE, i am getting the output in the form of a list, which is as follows. \begin{equation} t=[.366595121038205462, [pr = 14.2982930082790, ps = 22.5165237470778]] \end{equation} I just want to extract the value $pr \quad\&\quad ps $ from $t$, and store it in x and y respectively. Please help me.

till now i have used whattype() in order to check the type of t. And it comes out to be a list. Now i have to extract the floating values of ps and pr and put them in x and y respectively.

Answer 1

The following is sometimes referred to as 2-argument eval. It's nicer than assigning those values to pr and ps because it allows those names to continue to be used directly (as names) in forming new expressions.

t:=[.366595121038205462,[pr=14.2982930082790,ps=22.5165237470778]]:

eval(pr,t[2]);

                   14.2982930082790

eval(ps,t[2]);

                   22.5165237470778

And you can use it in compound formula too, all together.

eval(  ps^2 - sin(pr), t[2] );

                     506.0067945