transpose Questions
4
I have a square boolean matrix M of size N, stored by rows and I want to count the number of bits set to 1 for each column.
For instance for n=4:
1101
0101
0001
1001
M stored as { { 1,1,0,1}, {0...
Laaspere asked 23/7, 2018 at 9:37
1
We consider a bit matrix (n x m) to be a regular array containing n lines of integers of size m.
I have looked in Hacker's Delight and in other sources and the algorithms I found for this were rath...
Watery asked 15/2, 2017 at 13:19
15
Solved
Python has a nice zip() function. Is there a PHP equivalent?
4
I am trying to understand, if there is a fast way to do a matrix transpose (64x64 bits) using ARM SIMD instructions.
I tried to explore the VTRN instruction of ARM SIMD but am not sure of its effec...
15
How would you flip 90 degrees (transpose) a multidimensional array in PHP? For example:
// Start with this array
$foo = array(
'a' => array(
1 => 'a1',
2 => 'a2',
3 => 'a3'
),
'...
Noll asked 28/4, 2009 at 10:29
5
Solved
I am trying a very basic example in Python scipy module for transpose() method but it's not giving expected result. I am using Ipython with pylab mode.
a = array([1,2,3]
print a.shape
>> (3,)...
3
After using transpose on a dataframe there is always an extra row as a remainder from the initial dataframe's index for example:
import pandas as pd
df = pd.DataFrame({'fruit':['apple','banana'],...
12
Solved
I have a matrix (relatively big) that I need to transpose. For example assume that my matrix is
a b c d e f
g h i j k l
m n o p q r
I want the result be as follows:
a g m
b h n
c I o
d j p
e k...
1
Solved
Consider the following code in Python, where multiplying a pre-transposed matrix yields faster execution time compared to multiplying a non-transposed matrix:
import numpy as np
import time
# Gene...
2
I am trying to transpose rows into columns, grouping by a unique identifier (CASE_ID).
I have a table with this structure:
CASE_ID AMOUNT TYPE
100 10 A
100 50 B
100 75 A
200 33 B
200 10 C
...
Dornick asked 18/10, 2013 at 18:52
25
Solved
I've got an array of arrays, something like:
[
[1,2,3],
[1,2,3],
[1,2,3],
]
I would like to transpose it to get the following array:
[
[1,1,1],
[2,2,2],
[3,3,3],
]
It's not difficult to...
Intra asked 2/7, 2013 at 14:43
2
Solved
I have the following Pandas sub-dataframe
col1 name1 name2
522 a 10 0.2
1021 b 72 -0.1
col1 has no duplicate. I want to transpose the dataframe and change the column header to col1 values. Ideall...
Karilla asked 6/11, 2017 at 14:29
33
Solved
I have a huge tab-separated file formatted like this
X column1 column2 column3
row1 0 1 2
row2 3 4 5
row3 6 7 8
row4 9 10 11
I would like to transpose it in an efficient way using only bash comm...
9
Solved
I'm trying to transpose some columns of my table to row.
I'm using Python and Spark 1.5.0. Here is my initial table:
+-----+-----+-----+-------+
| A |col_1|col_2|col_...|
+-----+-----------------...
Dyson asked 16/6, 2016 at 16:6
6
I'm trying to create a function that takes in any array and transpose it so that rows turns to columns and columns to rows.
Not sure what I've done wrong or missing but keep getting this message on...
Trilbie asked 18/5, 2013 at 6:37
9
Solved
I have a data frame that follows the below long Pattern:
Name MedName
Name1 atenolol 25mg
Name1 aspirin 81mg
Name1 sildenafil 100mg
Name2 atenolol 50mg
Name2 enalapril 20mg
And would like ...
4
Solved
Lets say I have an array
a = np.arange(16).reshape((4,4))
0 1 2 3
4 5 6 7
8 9 10 11
12 13 14 15
But I want
15 11 7 3
14 10 6 2
13 9 5 1
12 8 4 0
which is a flip across the secondary diagon...
3
How can we transpose a Redshift table from columns to rows?
For example, if we have a generic (not already known) table like the following:
source table:
date id alfa beta gamma ... omega
2018-0...
Supernormal asked 4/9, 2018 at 21:59
1
I have a rather large rectangular (>1G rows, 1K columns) Fortran-style NumPy matrix, which I want to transpose to C-style.
So far, my approach has been relatively trivial with the following Rust...
7
I have a list of vectors:
asdf = list(c(1, 2, 3, 4, 5), c(10, 20, 30, 40, 50))
Now I want to "transpose" it, that is, obtain a list of 5 pairs instead of a pair of lists of 5.
To be more specif...
5
Solved
I have the following data.frame
df = structure(list(HEADER = c("HOME_TRPM", "AWAY_TRPM", "HOME_TEAM","AWAY_TEAM"),
price = c("0.863104076023855", "-0.845186446996287","CHA", "NOP")),
.Names = c(...
3
Solved
I have a 3D matrix x_test of size (100, 33, 66) and I want to change its dimensions to (100, 66, 33).
What is the most efficient way to do this using python3.5? I look for something along those li...
Ambit asked 24/11, 2017 at 9:58
1
I'm having a hard time to code this python line in C++:
Python:
frame_nn = cv2.cvtColor(padded, cv2.COLOR_BGR2RGB).transpose(2,0,1).astype(np.float32)[None,]
What I already got:
cv::cvtColor(image...
5
Solved
Let's say I have 4 arrays with the same amount of values in each:
$array1 = array(0, 7, 5, 0);
$array2 = array(2, 6, 10, 0);
$array3 = array(4, 8, 15, 10);
$array4 = array(6, 7, 20, 10);
I want to...
Purge asked 11/2, 2021 at 18:27
12
Solved
I have a row-based multidimensional array:
/** [row][column]. */
public int[][] tiles;
I would like to transform this array to column-based array, like following:
/** [column][row]. */
public i...
Crandale asked 7/12, 2011 at 20:55
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