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Reply to Peculiar EXC_BAD_ACCESS, involving sparse matrices
Hello Claude, First of all, I am sorry about the absence of comments. It would be a headache for me too if I had not written the code myself, so I should have thought about adding comments earlier... I will add them and send the code again soon. The xValues form the vector x in the equation Ax = B, where A and B are matrices that are the arguments of the leastSquaresSolution function. Apple describes how the Ax = B equation can be solved with Swift in this article. xValues is indeed modified by updating xPtr. xPtr's baseAddress is passed to the DenseVector_Double that holds x: let x = DenseVector_Double( count: Int32(A.transpose().count), data: xPtr.baseAddress! ) Then, x is passed to the constant 'status', which should modify x and thereby should modify xPtr and xValues: let status = SparseSolve(SparseLSMR(), a, b, x, SparsePreconditionerDiagScaling)
Topic: Programming Languages SubTopic: Swift Tags:
Jun ’24
Reply to develop 1 project on 2 macs?
Alright I have purchased a GitHub monthly membership and I don't know how to proceed. I created a private repo called iOS Projects and it generated a hyperlink to the repo.first think I need to know is how is a repo different from an xcode project? does a repo hold many xcode projects or is 1 repo meant to be for 1 project.Next, I see two places in xcode that take in GIT info.xcode>preference>accounts>add repoSource Control>Project Name <master> >configure Project Name>Remotes.Please help me out as to what I am supposed to do? Thanks...
Sep ’15
Reply to System Voraussetzung Xcode
Ich habe eine Zeit lang ein MacBook Air 2010 mit OS X 10.11 El Capitan für Xcode 7 verwendet. Mit 2 GB RAM und 250 GB Festplatte. Ich benutze jetzt XCode 11 auf einem MBP 2016, Catalina, 16 GB RAM, 500 GB Festplatte und es läuft gut. Bei einem großen Code hatte ich jedoch Probleme mit dem iMac mit 16 GB RAM mit XCode 9. Sie sollten also in der Lage sein, das MacBook Air mit 8 GB zu verwenden, aber Sie riskieren eine Verlangsamung, wenn Sie große Projekte kompilieren.I used a MacBook Air 2010 with OS X 10.11 El Capitan for Xcode 7 for a while. With 2GB RAM and 250 GB Disk. I now use XCode 11 on a MBP 2016, Catalina, 16 GB RAM, 500 GB Disk and it's doing well. But for a large code, I had problems on iMac with 16 GB RAM with XCode 9. So, you should be able to be able to use MacBook Air with 8 GB, but you risk slow down if you compile large projects.
Mar ’20
Reply to How Would You Solve For A Variable In An Equation?
Thanks! That's very helpful! Do you know how I might make a basic text parser that can extract the values of a, b, and c from one text field if written as something like this: a * x² + b * x + c = 0Also, since I'm not quite as good at math as you are, I have to ask; does the above code solve for x in any instance with one instance of x?
Topic: Programming Languages SubTopic: Swift Tags:
Feb ’17