💾 Archived View for blitter.com › apl-books › apl.maxhost.org › aplx-notes.html captured on 2024-05-12 at 16:35:24.
⬅️ Previous capture (2022-07-16)
-=-=-=-=-=-=-
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<pre>
use aplx-notes.sh to edit this file
kedit uses monospace fonts with utf-8 encoding
keys for APLX using Unified Keyboard
------------------------------------
shift-k '
shift-4 $
shift-alt-4 ⍋ grade up, e.g. ⍋B returns indices of B which will arrange B in ascending order
shift-alt-5 ⌽ reverse elements of array along last axis
shift-8 * exponential
shift-9 (
shift-0 )
shift-' " double quotes
alt-= ÷ divide or reciprocal
alt-dash × multiply
alt-l ⎕ box
alt-+ ! factorial
alt-i ⍳ indexed list character or iota function
alt-g ∇ start/end of function
alt-2 ¯ high minus sign
alt-[ ← left arrow means assign e.g. a ←1 means assign 1 to variable a
alt-r ⍴ reshape or rho operator
alt-o ○ PI times
alt-h △ triangle
alt-~ ◇ diamond
alt-q ? roll, e.g. ?3 returns a random number from 1 to 3
alt-d ⌊ floor
alt-s ⌈ ceiling
)LOAD MARK1 load program MARK1.aws
)SAVE MARK1 save program MARK1.aws
)IN MARK1 import a Transfile File MARK1.atf
)OUT MARK1 create a Transfile File MARK1.atf
)OFF exit aplx environment
)CLEAR clears workspace
)DISPLAY V display variable V
)DIGITS displays how many digits after decimal point is printed
)SYMBOLS display how many symbols have been used
)TIME displays date and time
)HOST cmd execute a host command, e.g. )HOST pwd prints working directory
)HOST displays which operating system you are working on
)VARS displays variables
)LIB list all workspace names
)FNS list all functions in current workspace
)WIDTH displays print width, normally 80 characters
variables and functions are case sensitive e.g. m is different from M
v ← 1 2 3 4 5
store the numbers 1 through 5 in v
⌽ v 5 4 3 2 1
v[3] 3
v + 1 2 3 4 5 6
v - 1 0 1 2 3 4
v * 2 1 4 9 16 25 gives the array elements to the power of 2
+/v sum all elements of v
×/v product of all elements of v
:Repeat ∇ goob ∇ :EndRepeat
repeat a function
a ← 1 2 3
b ← 0 1 0
a + b 1 3 3
a x 2 2 4 6
(a b c) ← 1 2 3 compound assignment a = 1, b = 2, c = 3
M -> 'GERBIE POWER'
⌽ M REWOP EIBREG
3 ⌽ M BIE POWERGER (rotates letters 3 to the left)
? 100 generate a random number 1 and 100
? 5 10 20 generate a random number between 1 and 5, 1 and 10, and 1 and 20
!4 factorial 4
3⌊5 returns the lower number 3
÷2 returns reciprocal of 2
14 5 78 145×1.15
multiple series of numbers by 1.15
2 3 ⍴ 1 2 3 4 5 6 (2 rows, 3 columns)
1 2 3
4 5 6
BINGO ← 4 4 ⍴ 16 ? 100
store 16 numbers from 1 to 100 in a 4x4 matrix in BINGO
3 5 ⍴ 1
1 1 1 1 1
1 1 1 1 1
1 1 1 1 1
○ 1 displays pi multiplied by 1 (alt-o)
1 ○ 1 returns sine at 1 in radians
2 ○ 1 returns cosine at 1 in radians
⍳ 10 returns numbers 1 to 10
⎕ a returns lower case alphabet
⎕ A returns upper case alphabet
v ← ⍳ 10 stores numbers 1 to 10 in v
data ← ?100 p 100
store 100 random numbers from 1 to 100 in data
x[⍋x←6?40] pick 6 lottery numbers from 1 to 40
2 6 9 19 22 31
v ← 6 1 3 4 5
v[⍋v] returns array v in ascending order
⌊ 45.9 returns floor of 45
⌈ 45.9 returns ceiling of 46
a ← ⍳4
a ← 2 2 ⍴ a reshape a into 2x2 matrix
label: label
∇ goob define function goob
'this is it'
∇
system variables
----------------
⎕PP ← 3 set print precision to 3 digits
⎕RL ← 12345 set random link value
⎕DISPLAY 1 2 3 display data in a box
⎕AV display all characters (atomic vector)
keys
----
ctrl-up arrow recalls previous line
workspaces
----------
located in /usr/local/aplxpe/ws/
HELPDRAW.aws
ALL_DEMOS
HELPQWI.aws
DEMO_Button
DEMO_Menu
DEMO_Picture
DEMO_RoundRect
TOOLKIT.aws
fibspiral
triangle
</pre>
</head>