Pseudorandom number generator image: Difference between revisions
Pseudorandom number generator image (view source)
Revision as of 11:51, 29 January 2024
, 3 months ago→{{header|Wren}}: Updated preamble and changed to Wren S/H
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}
</syntaxhighlight>
=={{header|jq}}==
'''Works with jq and gojq, the C and Go implementations of jq'''
It has been claimed that the elementary cellular automaton with "Rule 30" can
be used as a PRNG,
(see e.g. [[Elementary_cellular_automaton/Random_number_generator]]),
so this entry generates a set of (x,y,color) co-ordinates so that this
hypothesis might be visually evaluated e.g. using the gnuplot program.
To keep things brief, the jq filter definitions at
[[Elementary_cellular_automaton#jq]] are used but not repeated here.
<syntaxhighlight lang=jq>
include "elementary-cellular-automaton" {search : "."}; # the defs at [[Elementary_cellular_automaton#jq]]
def binary2number:
reduce (.[]|tonumber) as $x ({p:1}; .n += .p * $x | .p *= 2) | .n;
# Emit a stream of $n PRNGs in range(0;255)
def prng($n):
# 30 is 11110
("1" + 100 * "0" )
| [automaton(30; 8 * $n) | .[0:1]]
| _nwise(8) | binary2number ;
foreach prng(99*99) as $color ({x:0, y:1};
.color = $color
| .x += 1
| if .x == 100 then .x = 1 | .y += 1 else . end )
| "\(.x) \(.y) \(.color)"
</syntaxhighlight>
Invocation:
<pre>
jq -nrf program.jq > prng.txt
gnuplot
plot("prng.txt") with image pixels
</pre>
=={{header|Julia}}==
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writePgm(img, "prng_img.pgm", string.format("PRNG Image (%d x %d)", size, size))</syntaxhighlight>
=={{header|Maxima}}==
<syntaxhighlight lang="maxima">
genmatrix(lambda([i,j],random(1000)),1000,1000)$
wxdraw2d(image(%,0,0,30,30));
</syntaxhighlight>
[[File:PseudoRandomImageMaxima.png|thumb|center]]
=={{header|Nim}}==
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(prin (if (rand T) 1 0)) )
(prinl) ) )</syntaxhighlight>
=={{header|Python}}==
'''Libraries:''' [https://pypi.org/project/Pillow/ Pillow], [https://docs.python.org/3/library/random.html random]<syntaxhighlight lang="python3">
# pseudorandom number image generator by Xing216
from random import randbytes
from PIL import Image
size = 1500
x = bytes.fromhex(" ".join([randbytes(3).hex() for x in range(size*size)]))
img = Image.frombuffer('RGB', (size, size), x, 'raw', 'RGB', 0, 1)
img.show()
</syntaxhighlight>'''Output:''' [https://transfer.sh/tyN5SS95M0/rcXing216.png rcXing216.png] (transfer.sh)
=={{header|Raku}}==
Line 563 ⟶ 617:
=={{header|Wren}}==
{{libheader|DOME}}
<syntaxhighlight lang="
import "graphics" for Canvas, Color
import "random" for Random
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