Questions tagged [binary]
The binary tag has no usage guidance.
113
questions
0
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1
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55
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Colorized hexdump
I have this hexdump command that I am writing to display a nicely printed hexdump into a mathematic grid. I want to be able to specify regions that I can highlight, however I am stuck being only able ...
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1
vote
1
answer
144
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How can I Xor two decimal numbers?
I want to take two numbers, say 200 and 101, and transform them into their binary form. Then XOR them together and transform the result back into the decimal form. The result in this case should be ...
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1
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4
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319
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Converting two 8-bit integers into a single 16-bit integer
I have a situation where I have a pair of integers {a, b} where a and b are in bytes from a ...
- 93
2
votes
3
answers
105
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How to calculate the rightmost 1 and the leftmost 1 in the binary representation of a large number x?
So I have an integer $x$ between $1$ and $2^{64}$ and I am looking for the fastest way to get the rightmost 1 (the least significant bit or LSB) and the leftmost 1 (the most significant bit, MSB). How ...
- 305
2
votes
1
answer
127
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Parsing HTTP POST request or how to find a string in a byte array
I am a developer of a Mathematica web-server (see TinyWEB). I managed to parse a multipart POST request containing text files, however, it is hard to expand it to any types of binary data like JPEG, ...
- 1,177
4
votes
2
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178
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DigitCount[], but in negative bases
The DigitCount[n,b] function "counts the gives a list of the numbers of $1, 2, \ldots, b-1, 0$ digits in the base-$b$ representation of $n$".
I want to ...
- 967
9
votes
3
answers
1k
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Convert four bytes to IEEE 754 float
I have some bytes, say bytes=ByteArray@{189,178,61,188}, read from a file with Import[...,"Byte"]. The big endian ...
- 3,897
3
votes
1
answer
217
views
Convert List of integers to Hex
I'm doing some OpenCL computing with Mathematica, I have an SHA256 implementation running on my GPU. It returns a list of uints (64bit, Mathematica mistakenly treats these as signed 64bit ints), how ...
1
vote
1
answer
128
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Importing IDL sav file into Mathematica
I have a rather big (around 400 MB) file written by the IDL (Interactive Data Language) software into its binary format ".SAV" which is a proprietary format, not the spss format expected by ...
- 21
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votes
4
answers
202
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Row function to join together binary number elements
I am trying to join entries of binary numbers at the lowest level of a nested list, e.g.
...
- 65
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votes
0
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75
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Real to IEEE 754 not working for values -1<x<1
I have written a Module that takes a real number and returns the IEEE 754 floating point binary equivalent. It works fine for values above |1|, but I cannot get it to work for inputs less than |1|.
<...
- 65
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votes
1
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71
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Changing values in a list
I am currently working the genetic algorithm, specifically in the mutations part, that takes binary numbers and want to convert some of the values in a string into another value.
For example,
...
- 61
2
votes
1
answer
89
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Need help converting decimals to Binary
I am struggling figuring out how to turn decimals between {0,1} to binary. I am currently trying to use RealDigits[] and FromDigits[] For example using:
...
- 45
4
votes
2
answers
273
views
Numbers to binary and back
I am struggling on how to create a function that converts a number into binary and then back. I know there is a built-in function about this BaseForm[] but I am ...
- 61
0
votes
1
answer
500
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Algorithm to convert real numbers decimal to binary
Currently trying to write code that converts decimal floats to binary base form (I know BaseForm exists).
Currently I'm working with an example that takes 3.3 and converts it:
...
1
vote
3
answers
113
views
Converting Binary Values to Points [closed]
I searched a lot for this question but couldn't find a similar question.
How can I convert my binary values to points. The output of the code I wrote is below, I wrote my expectation also below.
...
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1
answer
47
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How do I get 3 digits binary after calling BaseForm or IntegerDigits [duplicate]
Let's say I have a list called 'solution', I'm converting these numbers into binary form
...
- 113
2
votes
1
answer
50
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How to read doubles from specific location of a large file
I have a 1GB file in a proprietary format that is a mix of ASCII characters and doubles (floating point numbers). I need to read in a sequence of twelve doubles. They are in consecutive bytes of the ...
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3
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555
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Generating a matrix with specific number of 1's in every row and column
I would like to have a function f(n,k) that generates a random nxn matrix with k elements equal to 1 in each row and column and has an all-zero diagonal, with all other elements equal to 0. In other ...
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1
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73
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Extracting data from binary file without reading the whole file - is this possible? [duplicate]
Suppose I have a binary data file that holds 1 million lists each composed of five integers. i.e. $\{ x1,x2,x3,x4,x5 \}$
Perhaps I am missing something obvious (quite likely) - but if I know I want to ...
- 747
1
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0
answers
110
views
Implementing the Binary GCD algorithm in Mathematica
Well, I have $n\in\mathbb{N}$ and I want to transform $n$ to a binary number which can be done using FromDigits[IntegerDigits[n, 2]]. I want to compute the ...
- 1,941
4
votes
1
answer
259
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Using Mathematica to derive analytic form of single variable function
I am interested in finding an analytical form of the following function $f(n)$ defined as:
$$f(n):=\sum_{\{\bar{K}\}}\prod_{l<j}^{n}e^{ik_lk_j},$$ where $\{\bar{K}\}$ is the full set of binary ...
- 295
2
votes
1
answer
143
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How to separate these circle based on their pixels mean intensity?
I have this image I want to separate green circles from yellow circle in two different images whiteout changing the pixel intensity information. I used the mean intensity
...
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4
votes
1
answer
113
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Binary permutation list code in Mathematica
Given some natural number $N$, I am interested in the set of all binary permutations of length $N$ (with the intention of storing in lists depending on how many $1$'s appear in each permutation). My ...
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3
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234
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Minimizing a function over a bounded domain with binary variables
I want to minimize the following function:
$$
f(m,n)= \sum_{i=1}^N\Big\{ \alpha_i(x_i-m)^T(x_i-m) \Big\} + \sum_{i=1}^N\Big\{\beta_i (x_i-n)^T(x_i-n) \Big\}
$$
where $m,n$ are all 2-d vectors:
$$
m:= ...
- 419
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votes
1
answer
400
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What is the relationship between the Wolfram executables? Where is this documented?
The relatively new wolframscript now accompanies the traditional math and wolfram binaries. ...
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5
votes
1
answer
543
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Read binary files and separate the 64-bit unsigned integers into certain forms？
I have a binary file where each data is a 64-bit unsigned integer (little endian). For simplicity, let's say the data in testdata.bin file opened in HxD is:
namely:...
- 1,586
2
votes
1
answer
422
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How do I get the data from this binary file? [duplicate]
I have a file which contains the following binary data:
...
- 9,113
7
votes
1
answer
734
views
Convert ByteArray to integer and real values
during the import of a complex file format I handle ByteArray or lists of byte values. While I can easy transform them from one type to each other:
...
- 857
4
votes
2
answers
187
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How to generate the 8^th order symmetric binary matrices whose sum of absolute eigenvalues is 8?
It is needed to generate all 8th order(8 by 8) symmetric binary matrices(of 0's and 1's) such that the sum of the absolute eigenvalues is 8. Listing all the 8th order symmetric binary matrices and ...
- 117
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0
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38
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FindClusters Hamming Distance giving error
I am trying to run FindClusters[hex, DistanceFunction -> HammingDistance[IntegerDigits[#, 2, 8], IntegerDigits[0, 2, 8]] &] over a list of data but I keep ...
- 477
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1
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95
views
Import and create a hexdump view of file
How would I go about creating a hexdump type of view of an imported binary file?
for example, (format is
...
- 477
1
vote
0
answers
45
views
Reading product of same ByteArrays
I am handling a huge set of data and I am trying to optimize my code. I have very large expressions to expand and simplify and I've seen that converting the expressions to ByteArrays improves a lot ...
- 1,628
4
votes
4
answers
288
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Generating all symmetric binary matrices of order up to 7?
I want to create all symmetric binary matrix with order up to 7. Can anybody help in creating this?
I want to obtain the subset of all symmetric matrices, with all diagonal entries being zero.
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3
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231
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Simplifying expressions containing binary variables
Consider an expression with two binary variables, $a,b\in\left\{ 0,1\right\} $, given by $F=(1-a-b)^{3}(1-b)$, with truth table:
...
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2
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77
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FindMaximum under binary constrains
I'm trying to find a maximum for a function whose variables have binary values (either -1 or 1). The clumsy code for that constraint I use is shown below. There must be a more compact code, and I ...
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44
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Table Glitch / Error with binary data
I have a large group of binary files that I am loading with
binaryList = Table[ BinaryReadList[ paths[[i]], "Byte"], {i, Length@paths}];
specifically ...
- 180
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1
answer
355
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Import OVF 2.0 Vector field files
I'm using a simulation software (mumax3) which outputs OVF_2.0 files. It can either export binary or text files. The binary files are usually much smaller than the text files. I would like to use the ...
- 400
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7
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Find if there are consecutive 1s in a binary representation of a number
Given a list of numbers in decimal form, what is the most efficient way to determine if there are any consecutive 1s in the binary forms of those numbers? My solution so far:
...
- 831
1
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1
answer
194
views
Construct a binary tree where nodes are labeled according to given rule
I want to plot a binary tree in Mathematica where the nodes are labeled according to a given rule. In fact, whether a node has a left child or a right child or both, will be determined by a rule. And ...
- 11
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vote
1
answer
98
views
How to understand and use bit operation for programming
I got the following code using bit operation from here:
...
6
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0
answers
141
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Importing a 12 bit array
I have a binary file of 12 bits integers obtained from a camera software. It can produce FITS files from these but the processing time on the large data set I have is excessive. What I have is the ...
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2
votes
0
answers
145
views
How to recover plaintext from .MX files?
I need a function to deserialize the contents of an MX source file for reading. We can’t simply use Get because I don’t want to load or run the code, but rather to ...
- 3,601
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0
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480
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Why does Mathematica consume so much memory when reading binary data?
There are somewhat similar questions on here, but I didn't find a satisfying answer for this case: I import a 1.7 GB binary data file using the following command:
...
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3
votes
1
answer
288
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How to get the bit size (bit length) of an integer? [closed]
Suppose I have the integer 255, so 11111111 is its base 2 (bit) representation and the bit size of 255 is 8.
How can I calculate the bit size of a (big) integer in Mathematica?
Is there a built in ...
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1
vote
1
answer
212
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Why ImportByteArray when generate image from bytes
I was trying to generate an image from a list of bytes so I only had to Import an Image once as I want to store a Base64Encoded ...
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0
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74
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Does NumericArray always maintain data unmodified?
Suppose that we create a NumericArray using a LibraryLink function, then pass this to another one. Is NumericArray guaranteed to maintain the binary data as it was ...
- 233k
3
votes
1
answer
401
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Read NumericArray from a file
Suppose I have a binary file which consists of a list of integer or real numbers. Let's say signed 8-bit integers; so each byte of the file is a single such integer. How can I read it and turn it into ...
- 283
4
votes
1
answer
117
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Something is wrong with the implementation of the ThueMorse function
While trying to answer this Math.SE question, I believe I found several bugs in Mathematica and Alpha relating to the Thue-Morse sequence.
As a quick reminder, the $n^{\rm th}$ element of the Thue-...
- 967
7
votes
4
answers
895
views
BitNot does not flip bits in the way I expected
Can anyone explain why the last result in these statements is not the bit-flipped version of arr?
...
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