Taking all values of a row if matrix fulfills vector=1

Hello,

I got a matrix and a vector like this:

>> a= rand(5)

>> a= rand(5)

a =

    0.8147    0.0975    0.1576    0.1419    0.6557
    0.9058    0.2785    0.9706    0.4218    0.0357
    0.1270    0.5469    0.9572    0.9157    0.8491
    0.9134    0.9575    0.4854    0.7922    0.9340
    0.6324    0.9649    0.8003    0.9595    0.6787
   
    
    
   vector=[1; 0;0; 1; 1]

vector =

     1
     0
     0
     1
     1

If I write this, I will only get the values of the first colum.

 b=a(vector==1)

b =

    0.8147
    0.9134
    0.6324
        

But I would like to have the whole row instead of the values of the first colum. Like this:

  b=  
  0.8147    0.0975    0.1576    0.1419    0.6557
  0.9134    0.9575    0.4854    0.7922    0.9340
  0.6324    0.9649    0.8003    0.9595    0.6787

Thanks!

Answer 1

[madhan ravi]

b=a(vector==1,:)

[Max Behr]

Thanks, worked fine!