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  4. matrix x vector -> vector

matrix x vector -> vector

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  • V Offline
    V Offline
    VeganFanatic
    wrote on last edited by
    #1

    In a template project I am working on I have basic matrix product fine. so given I have that working, I was looking at how to deal with matrix and vector product correctly as my books lack the algorithm I need. vector operator*(const matrix that) { vector result; for (int i = 0; i < that.data.size{}; i++) for (int j = 0; j < that.data[].size(); j++) .... return vector; } I am not sure how this loop needs to work

    enhzflepE CPalliniC 2 Replies Last reply
    0
    • V VeganFanatic

      In a template project I am working on I have basic matrix product fine. so given I have that working, I was looking at how to deal with matrix and vector product correctly as my books lack the algorithm I need. vector operator*(const matrix that) { vector result; for (int i = 0; i < that.data.size{}; i++) for (int j = 0; j < that.data[].size(); j++) .... return vector; } I am not sure how this loop needs to work

      enhzflepE Offline
      enhzflepE Offline
      enhzflep
      wrote on last edited by
      #2

      Here, this[^] link should help.

      V 1 Reply Last reply
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      • enhzflepE enhzflep

        Here, this[^] link should help.

        V Offline
        V Offline
        VeganFanatic
        wrote on last edited by
        #3

        I just need some code, now I am dealing with another problem, overloading []

        http://www.contract-developer.tk

        1 Reply Last reply
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        • V VeganFanatic

          In a template project I am working on I have basic matrix product fine. so given I have that working, I was looking at how to deal with matrix and vector product correctly as my books lack the algorithm I need. vector operator*(const matrix that) { vector result; for (int i = 0; i < that.data.size{}; i++) for (int j = 0; j < that.data[].size(); j++) .... return vector; } I am not sure how this loop needs to work

          CPalliniC Offline
          CPalliniC Offline
          CPallini
          wrote on last edited by
          #4

          vector[i] += that[i][j] * (*this)[j];

          :)

          If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
          This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
          [My articles]

          In testa che avete, signor di Ceprano?

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