HP Prime or HP 50g

[Angus]

The rpn mode of the prime came up in previous posts. You have the comma key for swap. But you need to add a number to the stack. You cannot do something like (...calculations resulting to say 1 on stack level 1) 0.1 SWAP MINUS to calculate "1-0.1". You have to do 0.1 ENTER SWAP MINUS.

I cannot compare this behaviour with the 48 series but I think I memorize that my 48gx behaved differently.

In my eyes it makes no sense having an rpn with a command line that has to be added to a stack prior using stack commands. Entry should be part of the stack. Am i wrong? Francois being happy with rpn puzzles me.

Personally I would really like to have that changed in the soon to come update :-)



It also would be helpful if the function app could define the functions independend variable. Especially when you would like to visualize cas results you frequently have trouble with passing correct data to the app. F1:=f(x) is fine, but F1:=f(r) needs to substitude r to x. F1:=f(a,b,c,d) assigning a,b,c a constant value and use d as indep. variable is voodoo.
btw. I sign that the math exploration stuff is marketing only - these functions will never ever guide a kid to gain a better understanding...

I think Tim hinted that HP is somehow aware that the interconnection of the sub modules need more consistancy and we will have all these issues reworked.