Here are two more things that might be bugs or intended behavior... I didn't find informations on the manual telling me either way.
1) I have entered several data points with Sigma+. Then I chose, from the STAT catalog, x^ (the ^ goes above the x of course), and the calc showed a numerical value, and "Linear" on top. If then I press the up/down arrows, on the top line, I see the contents of the program memory, and the numerical value changes according to the step that is displayed above.
I know next to nothing about statistics, but this looks like a strange behavior...
2) If I want to write a program that as the first thing, it duplicates what is in x to y (like the DUP command of RPL), I have to put two ENTER steps. I thought just one should do. Why does the first ENTER do nothing?
Thanks,
Cristian