indices Questions
1
Solved
I am carrying out a series of calculations using the sqrt() function. My colleagues and I have noticed that we get different results when using the same inputs. Has anyone encountered this pr...
Esquiline asked 13/2, 2015 at 10:49
5
Solved
I had a generic question about JavaScript arrays. Are array indices in JavaScript internally handled as strings?
I read somewhere that because arrays are objects in JavaScript, the index is actuall...
Forgiving asked 18/12, 2014 at 1:13
2
Solved
If I print a matrix, it is shown with row and column indices in the console. E.g.
> print(diag(3))
[,1] [,2] [,3]
[1,] 1 0 0
[2,] 0 1 0
[3,] 0 0 1
How can I suppress the column and row indi...
3
Solved
I frequently use the numpy.where function to gather a tuple of indices of a matrix having some property. For example
import numpy as np
X = np.random.rand(3,3)
>>> X
array([[ 0.51035326, ...
Raver asked 29/2, 2012 at 17:9
1
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I'm trying to map a texture on a cube which is basicly a triangle strip with 8 vertices and 14 indicies:
static const GLfloat vertices[8] =
{
-1.f,-1.f,-1.f,
-1.f,-1.f, 1.f,
-1.f, 1.f,-1.f,
-1....
Outface asked 26/8, 2014 at 10:39
2
Solved
I’m working on SQLite3 indices.
Here’s a table COMAPNY:
CREATE TABLE COMPANY(
ID INT PRIMARY KEY NOT NULL,
NAME TEXT NOT NULL,
AGE INT NOT NULL,
ADDRESS CHAR(50),
SALARY REAL
);
INSERT INTO COMP...
3
Solved
Starting with two lists such as:
lstOne = [ '1', '2', '3', '4', '5', '6', '7', '8', '9', '10']
lstTwo = [ '1', '2', '3', '4', '5', '6', '7', '8', '9', '10']
I want to have the user input how man...
Apiece asked 4/5, 2014 at 17:26
3
Solved
In the C# programming language, how do I pass a row of a multi-dimensional array? For example, suppose I have the following:
int[,] foo;
foo = new int[6,4];
int[] least;
least = new int[6];
for(i...
Coastal asked 6/3, 2012 at 19:2
1
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I am toying with C++11 lambdas and was trying to mimick some function from the functional module of the D programming language. I was actually trying to implement curry and compose. Here is the mai...
3
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I am trying to extend the possibilities offered by std::integer_sequence with a new class named integer_range (which obiously creates a sequence of integers between two bounds). My implementation w...
Lyford asked 22/4, 2014 at 19:52
2
There's the code with the TypeError in it. "list indices must be integers, not list", though they are integers. I'd appreciate you helping me figure out what's wrong. What I need is to get ma...
2
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I'm currently reading Robert Sebesta's Concepts of Programming Languages, 10th edition (2012). In the chapter about data types, it reads "Ruby and Lua support negative subscripts, but Python does n...
1
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I thought OpenMesh would support random access to faces edges vertices.
All I can find are iterators and circulators:
for( auto v : mesh->vertices() )
mesh->point(v).data();
How can I do...
5
I've a vector that I would like to split into overlapping subvectors of size cs in shifts of sh. Imagine the input vector is:
v=[1 2 3 4 5 6 7 8 9 10 11 12 13]; % A=[1:13]
given a chunksize of 4...
1
Solved
I want to find a fast way (without for loop) in Python to assign reoccuring indices of an array.
This is the desired result using a for loop:
import numpy as np
a=np.arange(9, dtype=np.float64).re...
3
Solved
I'm trying to get a list of the indices for all the elements in an array so for an array of 1000 x 1000 I end up with [(0,0), (0,1),...,(999,999)].
I made a function to do this which is below:
de...
1
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I'm trying to apply a function to a group of columns in a large data.table without referring to each one individually.
a <- data.table(
a=as.character(rnorm(5)),
b=as.character(rnorm(5)),
c=...
Rosannarosanne asked 28/5, 2013 at 3:51
1
Solved
Suppose I'm representing a matrix foo of values using std::vector:
int rows = 5;
int cols = 10;
auto foo = vector<vector<double>>(rows, vector<double>(cols));
Is there a cleve...
1
Solved
I recently began exploring indexing in sqlite. I'm able to successfully create an index with my desired columns.
After doing this I took a look at the database to see that the index was created su...
1
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This is somewhat related to a question I asked not too long ago today. I am taking the intersection of two lists as follows:
inter = set(NNSRCfile['datetimenew']).intersection(catdate)
The two ...
Boorish asked 24/9, 2012 at 18:5
2
Solved
For two lists,
a = [1, 2, 9, 3, 8, ...] (no duplicate values in a, but a is very big)
b = [1, 9, 1,...] (set(b) is a subset of set(a), 1<<len(b)<<len(a))
indices = get_indices_of_a(a...
2
Solved
I wonder if anyone can help me understand how indices work with glDrawElements. In the below example (taken from http://www.everita.com/lightwave-collada-and-opengles-on-the-iphone) the author ment...
Athalia asked 14/2, 2012 at 10:8
6
Solved
i have two sq matrix (a, b) of size in order of 100000 X 100000. I have to take difference of these two matrix (c = a-b). Resultant matrix 'c' is a sparse matrix. I want to find the indices of all ...
Towle asked 9/9, 2011 at 12:12
2
Solved
I've always found it awkward to have a function or expression that requires use of the values, as well as indices, of a list (or array, applies just the same) in Haskell.
I wrote validQueens below...
1
Solved
I'm trying to draw a terrain with GL_TRIANGLE_STRIP and glDrawElements but I'm having a really hard time understanding the indices thing behind glDrawElements...
Here's what I have so far:
void T...
Ta asked 24/4, 2011 at 22:57
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