Questions tagged [numeric-array]
The numeric-array tag has no usage guidance.
18
questions
2
votes
1
answer
28
views
Fitting a free parameter by matching a an array with another array
I have the following problem that I can't figure out how to solve.
I have two measured signals, (data1 and data1), and their measured sum (datasummeasured). I have a theoretical description of how the ...
- 21
0
votes
2
answers
41
views
Use elements of an array in a function [closed]
I have an array that I am importing from a mat file lets call it $A$.
I want to define a function like
F[n_,m_] = m A[[1,n]]
But when I do this, I get an error
<...
2
votes
3
answers
132
views
How to remove extra parentheses in a matrix [closed]
I have the following matrix with Dimensions[A] = {5}. What is the easiest way to convert it to $8 \times 8$ matrix?
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- 247
3
votes
2
answers
174
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Partition of lists with specified elements
I have an array like this and want to split it into sublists. It should contain the first element "Res" without curly braces and the one sublist starts from 2 to the 9th column the 3rd ...
- 73
2
votes
0
answers
40
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How to multiply NumericArrays element-wise? [duplicate]
Normally, Times threads element-wise over lists, so we can use it to express element-wise multiplication of arrays:
...
- 2,953
2
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0
answers
51
views
Can NumericArray be Compiled?
I've have a big block of code written under Compile. Some other part of the code which receives data from shared Q useing ...
- 403
0
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0
answers
49
views
Cannot generate an array of results for my numerical method
I want to apply the following scheme:
$$
\begin{aligned}
\psi_{i, j+1} &=-\psi_{i, j-1}+\left(\frac{\Delta t}{\Delta r_*}\right)^2\left(\psi_{i+1, j}+\psi_{i-1, j}\right) \\
&+\left(2-2\left(\...
- 19
1
vote
1
answer
58
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Strange behaviour of IntersectingQ
I wanted to check whether two lists of complex numbers have an element in common and stumbled upon this rather strange behaviour of the function IntersectingQ. If I ...
- 1,470
13
votes
2
answers
255
views
Arithmetic operations on NumericArrays
Currently, NumericArrays are directly supported by the most important array-related functions, what makes them a very attractive data structure for implementing ...
- 61.5k
11
votes
1
answer
324
views
What is idiomatic way to extract NumericArray from Image?
It is easy to see that NumericArray is a construct underlying Image:
...
- 61.5k
1
vote
1
answer
62
views
Why the substraction of two big numbers does not yield 0, but taking their quotient yields 1?
I have two series, generated as,
...
3
votes
1
answer
98
views
Problem with ConjugateTranspose on 1D array
Bug introduced in 12.3 or earlier, fixed in 13.0.
Suppose I have a normalized numerical 1D array, B1,
...
- 5,941
3
votes
4
answers
69
views
Making function $S$ such that inputs as an list $\{1,3,2,4, \}$ and produces $s_{1234}$
I want to make $S[\{,\cdots, \}]$ as follows
First input of $S$ is given list $\{1,2,3,\cdots, n\}$ and it produces $s_{123\cdots n}$
Further, if the ordering of the list is given differently, still ...
- 803
2
votes
1
answer
112
views
NumericArray in DICOM Implementation of Version 12.1
The 12.1 reimplementation of import for DICOM data seems to bring in the data from a single slice as a NumericArray, In the past, the data would be returned as a ...
- 328
1
vote
1
answer
70
views
Get all step values from a while-loop
I did a loop (first of my life) for an iterative calculation. Is it possible to get all step values as a matrix. That means the "xValue" variable should be like {215.108,219.688,...} and not only the ...
- 508
1
vote
1
answer
77
views
Identifying transitions in an array
I have two arrays of elements. The second array is generated by the transfer of one or more element to another position. I want to know which element is transferred to which position. Following is the ...
- 1,185
5
votes
0
answers
76
views
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
views
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