h h See all the help at once.
. Denotes the top of the stack
It is possible to move the . marker upwards through the stack, temporarily hiding some numbers from commands like +. This is called stack truncation, see Truncating the Stack, if you are interested.
n Change sign of the number in the top of the stack
Q Square root of the number in the top of the stack
NOTE These commands replace the top of the stack with the result of the calculation.
U Undo operations on the stack.
D Redo operations on the stack.
<RET> If you press <RET> when you're not entering a number, the effect is to duplicate the top number on the stack.
<SPC> Does the same <RET> does.
<TAB> Exchanges the top two elements of the stack.
M-<TAB> Rotates the top three elements of the stack.
<DEL> Removes the top of the stack.
M-0 <DEL> Removes the entire stack.
The Trails records everything we did since we loaded the Calculator.
t d Display/Hide the Trail.
There should be a little ‘>’ arrow (the trail pointer) resting on the last trail entry.
t ] Reset the trail pointer.
t p Move the trail pointer to the previous entry.
t n Move the trail pointer to the next entry.
t y Yank an entry number back onto the stack.
t r Trail search reverse. Use C-s or C-r to continue the search forwards or backwards.
All calculator commands begin with the word calc-. You can type x directly which is just like the regular M-x key except that it types the calc- prefix for you.
The notation (a, b) represents a complex number.
' Enter algebraic expression.
m a Activates/Deactivates the Algebraic mode.
In Algebraic mode, when you press any key that would normally begin entering a number (such as a digit, a decimal point, or the _ key), or if you press ( or [, Calc automatically begins an algebraic entry.
vector-mean
u M Calculate the mean of a vector.
f h
hypot Calculate hypotenuse using Pythagorean Theorem.