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New posts in matrix
model.matrix generates fewer rows than original data.frame
Nov 12, 2019
r
model
matrix
dataframe
Linear indexing, logical indexing, and all that
Sep 01, 2022
arrays
matlab
matrix
matrix-indexing
Combining (cbind) vectors of different length
Sep 01, 2022
list
r
merge
matrix
How to fill a matrix with zero (0)
Sep 01, 2022
r
matrix
zero
A Cache Efficient Matrix Transpose Program?
Sep 01, 2022
algorithm
caching
matrix
How to fill matrix with random numbers in R?
Sep 01, 2022
r
matrix
What is SVD(singular value decomposition)
Sep 01, 2022
math
matrix
linear-algebra
svd
subtract a constant vector from each row in a matrix in r
Sep 01, 2022
r
vector
matrix
Isn't double[][] equivalent to **double?
Sep 08, 2022
c++
pointers
matrix
multidimensional-array
Scipy sparse matrices - purpose and usage of different implementations
Sep 01, 2022
python
matrix
scipy
sparse-matrix
How to get mean, median, and other statistics over entire matrix, array or dataframe?
Sep 01, 2022
arrays
r
matrix
dataframe
r-faq
Why does numpy.linalg.solve() offer more precise matrix inversions than numpy.linalg.inv()?
Oct 25, 2022
python
arrays
numpy
matrix
linear-algebra
Matrix "Zigzag" Reordering
Jul 09, 2022
matlab
loops
matrix
Python (NumPy, SciPy), finding the null space of a matrix
Nov 27, 2018
numpy
matrix
scipy
linear-algebra
svd
How do you concatenate the rows of a matrix into a vector?
Sep 01, 2022
matlab
matrix
concatenation
How to convert a column or row matrix to a diagonal matrix in Python?
Sep 01, 2022
python
numpy
matrix
scipy
Combining matrices into an array in R
Sep 01, 2022
arrays
r
matrix
How to remove rows of a matrix by row name, rather than numerical index?
Sep 01, 2022
r
matrix
subset
rowname
R - image of a pixel matrix?
Sep 27, 2022
r
image
ggplot2
matrix
Organizing felt tip pens: optimizing the arrangement of items in a 2D grid by similarity of adjacent items, using JS [updated]
Mar 06, 2022
javascript
arrays
algorithm
matrix
mathematical-optimization
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