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Recent questions tagged Linear
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linear algebra - Why is Matlab's inv slow and inaccurate?
I read at a few places (in the doc and in this blog post : http://blogs.mathworks.com/loren/2007/05/16 ... someone here could guide me. Thanks ! See Question&Answers more detail:os...
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Oct 17, 2021
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linear programming - Blend : minimize weight but keep it robust
I need to build an object. The object is a mixture of 3 elements. I need to minimize the object ... stackoverflow.com/questions/65829711/blend-minimize-weight-but-keep-it-robust...
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Oct 7, 2021
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linear programming - Adding constrain to check if there exist a combination of pairs such that it statisfy a ratio?
Lets say I have a set of items in a set x0, ..., x14 each consisting its own values v0, ..., v14 I am ... -constrain-to-check-if-there-exist-a-combination-of-pairs-such-that-it-sta...
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Oct 7, 2021
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linear programming with python
I'am trying to solve a following problem. In fact, this is Least Absolute Deviation Regression problem. ... ://stackoverflow.com/questions/65847729/linear-programming-with-python...
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Oct 7, 2021
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linear programming - "gurobipy.gurobipy.GurobiError: Invalid argument to LinExpr multiplication"
I tried to write an objective function but I got error like "gurobipy.gurobipy.GurobiError: Invalid ... /gurobipy-gurobipy-gurobierror-invalid-argument-to-linexpr-multiplication...
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Oct 7, 2021
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linear algebra - Efficient algorithm to find max points on a line given a collection of Vector3 points?
I am trying to figure out an efficient algorithm to detect the most points on the same line given a collection of N ... find-max-points-on-a-line-given-a-collection-of-vector3-p...
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Oct 7, 2021
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620
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linear algebra - Calculation mistakes of SparseLU in Eigen (C++)
Recently I found that in some certain circumstances, the SparseLU solver will get the wrong answer. I give an ... com/questions/65912200/calculation-mistakes-of-sparselu-in-eigen-c...
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Oct 7, 2021
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linear algebra - numpy.linalg.eig does not find obvious eigen vector
I have a matrix A as below: A Out[34]: array([[1, 1, 1, 1, 0, 0, 0, 0], [1, 1, ... https://stackoverflow.com/questions/65950798/numpy-linalg-eig-does-not-find-obvious-eigen-vector...
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Oct 7, 2021
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linear programming - I'd like to use attributes of r function at Rcpp
This is my cpp code.. using lp function (with lpSolve package) I'd like to assign the 'solution' attribute of ... questions/65952624/id-like-to-use-attributes-of-r-function-at-rcpp...
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Oct 7, 2021
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488
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linear programming - Solution region of a system of inequalities in R
I have a system of inequalities Ab >= 0, where A is a n by p matrix, b and 0 are vectors of ... .com/questions/65946081/solution-region-of-a-system-of-inequalities-in-r...
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Oct 7, 2021
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linear programming - How can I change the output of the lp_solver on Linux to show large numbers instead of scientific notation?
I'm working with the lp_solver on ubuntu on some examples. Most of them are based on big prodution problems. Every time ... -of-the-lp-solver-on-linux-to-show-large-numbers-inst...
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Oct 7, 2021
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linear
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389
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linear searching with two letters python
I have this program which should return (using linear searching) a list of all instances of single characters ... .com/questions/65649589/linear-searching-with-two-letters-python...
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Oct 7, 2021
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linear
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670
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linear programming - Solving MIP efficiently problems with z3
I have a reasonably simple MILP (mixed integer linear program): https://0bin.net/paste/B1IE5l8l#2YLLrptC-l1ml+ ... .com/questions/66056792/solving-mip-efficiently-problems-with-z3...
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Oct 6, 2021
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595
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linear programming - Solving MIP efficiently problems with z3
I have a reasonably simple MILP (mixed integer linear program): https://0bin.net/paste/B1IE5l8l#2YLLrptC-l1ml+ ... .com/questions/66056792/solving-mip-efficiently-problems-with-z3...
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Oct 6, 2021
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480
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linear regression - how to test for interaction effect with two categorical independent variables and a time series dependent variable
I have two independent variables: Group (Treatment & Control) and Block (Stressor 1 and Stressor 2). I ... test-for-interaction-effect-with-two-categorical-independent-variables-an...
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Oct 6, 2021
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linear regression - how to test for interaction effect with two categorical independent variables and a time series dependent variable
I have two independent variables: Group (Treatment & Control) and Block (Stressor 1 and Stressor 2). I ... test-for-interaction-effect-with-two-categorical-independent-variables-an...
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Oct 6, 2021
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501
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linear searching with two letters python
I have this program which should return (using linear searching) a list of all instances of single characters ... .com/questions/65649589/linear-searching-with-two-letters-python...
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Jul 7, 2021
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447
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linear searching with two letters python
I have this program which should return (using linear searching) a list of all instances of single characters ... .com/questions/65649589/linear-searching-with-two-letters-python...
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Jul 7, 2021
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linear algebra - How to create a set of output data that can be graphed for a range of variables in MATLAB
I am trying to create a graph of a velocity against my output variables from the set of matrices shown below on ... the produced outputs as variables that can then be plotted....
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Feb 19, 2021
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linear programming - How can I change the output of the lp_solver on Linux to show large numbers instead of scientific notation?
I'm working with the lp_solver on ubuntu on some examples. Most of them are based on big prodution problems. Every ... simplicity to write entries and install. Thanks, Best, J....
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Feb 19, 2021
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