/sci/ - Science & Math

you choose the length based on the expected error.
say you have a file with 16 bits. and you expect 2 bits to fail. you want to make sure that you flip back the two correct bits.
say you have a bit of your checksum be the sum of the bits.
next bit is sum of first half of bits. next will be sum of first 4 bits and the sum of 3rd 4 bits then sum of 1,2,5,6,9,10,13,14
then odds.
I'm not sure, but I think this will give you a way to completely check a 16 bit file.
I'm no expert, just a thought.
Md5 checksums are huge (i think 32 bytes) and data errors are small. which gives an accurate sum for files with that many data points safe from single errors. I honestly don't know. Look it up other places on-line?

>>1079192
lol
so greco-roman gods don't count?

my earliest memory i can date is the birth of my sister. She was born at home, and i can remember hearing my mom scream. I don't know if a different memory is earlier or later, but I recall bouncing on a mattress in a large open room in the same house. I have frequent memories fromt the age of about 5, linked with the next house i lived in.

An infinite number of mathematicians, a polar bear, helium, and a neutrino walk into a bar (ouch). One of the mathematicians then says, "the bar is now empty" and they begin to play hide and seek. The neutrino is then stopped by a police officer. Officer Heisenberg says, "Do you know how fast you were going back there?" The neutrino replies, "I'm positive and a pascal but I don't know where I am." The bar tender then says "You're all idiots, the cows are all black" and pours 10 (in base 2, i mean 10) drinks and there is an extra dollar. The polar bear then dissolves in water while the helium does not react.

Who loves CERN? I love CERN?
http://press.web.cern.ch/press/PressReleases/Releases2010/PR08.10E.html
Pic not related.

>you're
>your
yes, i am trolled.

>>1054422

I approve this message.

You have no idea what you're talking about.
Just thought I'd let you know.
pi is not random, it is pi. I know that may sound philosophical to you, but that string of numbers has a set of properties, and they define that string. It's like saying "How do you explain 1*x=x"

Good luck getting an answer. Most people on here are either ignorant, or in the wrong field for pretty much any question. (I think I fall in the second, but probably the first as well).

TGA is a file format. Like gif or png.
So do I?
It wasn't supposed to be particularly interesting, only noteworthy because it was created with a very simple C program.

shameful self-bump.
Yes, I know i'm pathetic for seeking attention, but when I did the same thing 8 hours ago in python, people were interested.
Oh well.

source and an output are on my website:
http://doolittle.icarus.com/~joseph/Fractal.c
http://doolittle.icarus.com/~joseph/out.jpg
you have to compile Fractal.c
any c complier should work.
then run the output. it will generate a .tga file, which you should be able to convert to jpg.
I don't know of any problems with dimensions, but I think if you try to make an image of size 2000000x2000000 it will break. not sure.

keep in mind that this is /sci/ not /b/
Chris chan is not a part of /sci/ culture.

what a douche.
Congrats OP, way to put in the effort.
Have anything to brag with?

I got a fully functional image maker working in C and TGA
It took me a long time to figure out TGA completely, and then a while more to do it with C. But here is an initial result. Fractal and program on net will come soon.

yay for anonmity.
if anyone was stalking me on here, they would actually know quite a lot about me.

>>1046201
orbital distance.
duh.

1/x^12-1/x^6
or any different values.

>>1045875
I'm rather sure I can handle the data-write.
I know the length of the header, I can create a "number" with the first 64 bites, write to file, repeat. at end of file, does TGA care if there are trailing zeros? do you know?

Ok, I think i got it. I'll repost code in about 24-36 hours. Using C and TGA.

>>1045829
00 00 02 00 00 00 00 20 00 00 00 00 80 07 38 04 18 00
so this is the header I want? after changing the diminsions?

>>1045805
gah, file formats.
i think i could do bmp.
i'll look at png.
i wish there was an easier way...

>>1045773
Thanks, I'll look it up. I may post something using that later.

>>1045740
i know. i could easily do it in C, but I don't know an easy way to turn the output into an image. and it would be a buttload faster.