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Given an unpivoted form of Aasen's algorithm, how does one add pivoting?

I've implemented the version of Aasen's algorithm described in the book Matrix Computations 4th Edition. The version there doesn't have pivoting. The book's description of how to add pivoting is a bit ...
14 views

Plotting piecewise function with python and matplotlib [closed]

Can someone please help me with plotting this graph in python? This is my code so far. I tried plotting it with the equation for each line but it didn't give me the expected result. ...
19 views

Why did they make Julia array 1-base indexed? [closed]

Why did they make Julia arrays 1-base indexed? Any grounds for this? I think languages with 1-based arrays are doomed :)
35 views

How do I extract the output of Aasen's algorithm into a usable form?

I tried implementing the algorithm in Aasen's 1971 paper on factorizing symmetric indefinite matrices. I've translated the code verbatim from Algol into Python, and I used the test example given in ...
81 views

Is it possible to resample grid in such a way so that continuous objects remain continuous?

Suppose I rasterize a rectangle of width 2.5 gridpoints and get the values as shown: =============== | 0 | 1 | 1 | 0.5 | 0 | Now I resample that ...
39 views

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How to classify collected data into different matrices on Mathematica? [closed]

I have a text with collected data taken for an interval of time for several variables (32) (time, pressure, temperature, height...etc.) The text file just contains values separated by a space, each ...
112 views

How to set up the differential equation system to speed up computation?

I've set up a system of differential equations, obtained after discretizing pde, in the following way ...
323 views

Resources on mesh generation for finite element methods

I know that this is not really apart of the rules as this is a recommendation question and these don't really have an answer per say. But, like this forum posting: https://stackoverflow.com/questions/...