Better selection in CAS expressions

[marcin1812]

Hi, is there any method (apart copy/paste) for more accurate selection within expression in CAS?
Currently I Can mark whole expression in stack by using cursor Up and Down.
But I want to mark part of expression. and I Cant.
Copy / paste is quite slow and clumsy...
I thougth that cursor left/right should divide selection by for example parts of expression.
But I didn't find any key combination to do this.

Is marking really so unfinished function after more than 10 years of development firmware?

Rerards

[Didier Lachieze]

• Recall the expression to the command line,
• then open the Copy menu (Shift Copy),
• position the cursor to the beginning of the part you want to select,
• press the soft key Begin,
• position to the cursor at the end of the part to select and press End,
• the sub expression is now selected.
  

[parisse]

This is something that was available on the hp49/50/40 equationwriter and is really missing on the Prime: being able to select a part of an expression, and not only copy this part, but also be able to rewrite the selection, for example factor it, or rewrite trig with sin, cos, tan, etc.

[marcin1812]

Didier:
Yes, I know Copy/Paste is working, but... this is not effective and a bit primitive.

Prime has a great hardware, but soft sometimes can't keep up with hardware.

In my opinion "left" should split selection to smaller part of expression, then up/down should move to the next parts of expression.

30 Years old Derive for DOS was it well resolved
So there are old good examples, and no need to reinvent.

Regards

[ramon_ea1gth]

(11-06-2024 07:33 AM)parisse Wrote:  This is something that was available on the hp49/50/40 equationwriter and is really missing on the Prime: being able to select a part of an expression, and not only copy this part, but also be able to rewrite the selection, for example factor it, or rewrite trig with sin, cos, tan, etc.

I also have to agree with this point, which has been widely discussed in previous threads. The great speed of the Prime and the updated CAS, compared to the HP 50g, is diminished by the inability to select subexpressions, e.g. to rewrite some isolated trigonometric terms/factors, as mentioned. Splitting the whole expression by copying and pasting and regrouping later is a workaround, but you lose a lot of agility and the procedure is prone to errors when regrouping.
I hope the new team has this feature on their to-do list.