How to use a vector as index in eigen












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In matlab, we can use a vector B to get the sublist of vector A by coding like A(B). But in Eigen, I am wondering if there is anyway to do that?










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    1















    In matlab, we can use a vector B to get the sublist of vector A by coding like A(B). But in Eigen, I am wondering if there is anyway to do that?










    share|improve this question

























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      1








      In matlab, we can use a vector B to get the sublist of vector A by coding like A(B). But in Eigen, I am wondering if there is anyway to do that?










      share|improve this question














      In matlab, we can use a vector B to get the sublist of vector A by coding like A(B). But in Eigen, I am wondering if there is anyway to do that?







      c++11 eigen






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      asked Dec 31 '18 at 3:30









      Y. WangY. Wang

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          With the current development branch (since mid-2018) and starting with the 3.4 releases (which will likely be released start of 2019) you can simply write A(B), if B is either an Eigen object or a std::vector with integer coefficients.



          See new features of the 3.4 release page for details.






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          • Thanks! Hope 3.4 can be released soon.

            – Y. Wang
            Jan 1 at 18:54











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          active

          oldest

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          oldest

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          active

          oldest

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          0














          With the current development branch (since mid-2018) and starting with the 3.4 releases (which will likely be released start of 2019) you can simply write A(B), if B is either an Eigen object or a std::vector with integer coefficients.



          See new features of the 3.4 release page for details.






          share|improve this answer
























          • Thanks! Hope 3.4 can be released soon.

            – Y. Wang
            Jan 1 at 18:54
















          0














          With the current development branch (since mid-2018) and starting with the 3.4 releases (which will likely be released start of 2019) you can simply write A(B), if B is either an Eigen object or a std::vector with integer coefficients.



          See new features of the 3.4 release page for details.






          share|improve this answer
























          • Thanks! Hope 3.4 can be released soon.

            – Y. Wang
            Jan 1 at 18:54














          0












          0








          0







          With the current development branch (since mid-2018) and starting with the 3.4 releases (which will likely be released start of 2019) you can simply write A(B), if B is either an Eigen object or a std::vector with integer coefficients.



          See new features of the 3.4 release page for details.






          share|improve this answer













          With the current development branch (since mid-2018) and starting with the 3.4 releases (which will likely be released start of 2019) you can simply write A(B), if B is either an Eigen object or a std::vector with integer coefficients.



          See new features of the 3.4 release page for details.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Jan 1 at 16:29









          chtzchtz

          6,74311232




          6,74311232













          • Thanks! Hope 3.4 can be released soon.

            – Y. Wang
            Jan 1 at 18:54



















          • Thanks! Hope 3.4 can be released soon.

            – Y. Wang
            Jan 1 at 18:54

















          Thanks! Hope 3.4 can be released soon.

          – Y. Wang
          Jan 1 at 18:54





          Thanks! Hope 3.4 can be released soon.

          – Y. Wang
          Jan 1 at 18:54


















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