All Questions
7 questions
1
vote
1
answer
35
views
how to randomize a matrix keeping the rows fixed in python
I'm trying to randomize all the rows of my DataFrame but with no success.
What I want to do is from this matrix
A= [ 1 2 3
4 5 6
7 8 9 ]
to this
A_random=[ 4 5 6
7 8 9
...
- 51
0
votes
1
answer
171
views
Creating matrix from random block rows of another matrix without loop (in R)?
I am trying to create a matrix by drawing random block rows from another matrix. I have managed to do so with a loop.
set.seed(1)
a_matrix <- matrix(1:10,10,5) # the matrix with original sample
...
- 151
0
votes
1
answer
294
views
Random row from matrix with row number Matlab
How to pick a random row from a matrix in Matlab, and also row number of picked row?
I'v a matrix named M of 4x3 is following:
-21.8318 19.2251 -16.0000
-6.2788 8.6988 -10.0000
1.5553 ...
user3396151
3
votes
3
answers
9k
views
C - Matrix, random numbers
I wrote a code to print 5x6 matrix of numbers, but i'm trying to figure out how can I make numbers within matrix random (if possible, within interval). How similar is it to getting random numbers in ...
- 301
0
votes
2
answers
153
views
Python: Why randint on a matrix keeps giving me the same rows [duplicate]
I'm using Python 3 and with this code:
import random
mat = [[0]*5]*5
for i in range (0,5) :
for j in range (0,5) :
mat[i][j] = random.randint(10,50)
print (mat)
I'm getting results ...
1
vote
1
answer
2k
views
Generate several random values where the sum equals a specified criteria (matlab) [duplicate]
Possible Duplicate:
Random numbers that add to 100: Matlab
I am looking to do the following:
Generate several random numbers between 10 and 50.
Have the sum of the random numbers equal 500.
...
- 43
11
votes
2
answers
16k
views
Randomly re-order (shuffle) rows of a matrix?
I would like to randomly re-order the rows of matrix A to generate another new matrix. How to do that in R?
- 3,843