How can I sum (multiply ...) all elements on the calc stack?

Question

Sometimes I just want to sum a bunch of numbers in calc. Right now I press + until the stack is empty. Is there a shorthand for this?

You can use the prefix C-u, followed by the number of entries on the stack, followed by the symbol of the calculation. — Swedgin, Feb 06 '20 at 15:08

score 3 · Answer 1 · answered Feb 06 '20 at 17:41

3

Summing the whole stack of calc can be achieved using a keyboard macro.

Define the macro (which does just the + operation): C-x ( + C-x ).
- BTW this definition already sums two elements of the stack as a side effect.
Then run the macro until an error occurs with C-0 X.
That's it! The error is expected to occur when one element remains on the stack.

If you know the stack size you possibly better use the suggestion of swedgin.

answered Feb 06 '20 at 17:41

Marco Wahl

2,876
14
16

1

I think both answers are valid. However I can only accept one. But both get an upvote! :) – Arne Feb 11 '20 at 14:53

score 3 · Accepted Answer · answered Feb 06 '20 at 19:10

3

Another solution, if you know from the beginning that you want a sum, is use a vector. Prefix your list of numbers with [, finish with ], and sum using calc-reduce with the + operator (v R +):

[
1
2
...
]
v R +

answered Feb 06 '20 at 19:10

Erik Hetzner

765
3
6

How can I sum (multiply ...) all elements on the calc stack?

2 Answers2