Vector element manipulation

[kistan]

Hi,

First of all I am a beginner in STL. Please apologies for any stupid mistakes!

I have a created vector<double> xpos[4] which stores double numbers. In my vector xpos[0], xpos[1], xpos[2], xpos[3] have different sizes. I would like to call and compare xpos elements and ask for each has to have at least one element at the same instant. Let me explain the following:

vector<double> xpos[4];
vector<double> newxpos[4];
 
for(int i=0; i<max_event; i++){
     for(int roc=0; roc<4; roc++){
          xpos[roc].push_back[i];
     {
}

I can use the xpos[0] because it has the maximum size!

for(int j=0; j<4; j++){
     for(int k=0; k < xpos[0].size(); k++) {                                               
          if(xpos[1][k] != 0. && xpos[2][k] != 0. && xpos[3][k] != 0.){
                 newxpos[j].(?)
          }
     } 
} 
 

? ==> I do not know how to call the elements of xpos[all] when all matches?

Thanks.

[Silent1Mezzo]

Hi,

First of all I am a beginner in STL. Please apologies for any stupid mistakes!

I have a created vector<double> xpos[4] which stores double numbers. In my vector xpos[0], xpos[1], xpos[2], xpos[3] have different sizes. I would like to call and compare xpos elements and ask for each has to have at least one element at the same instant. Let me explain the following:

vector<double> xpos[4];
vector<double> newxpos[4];
 
for(int i=0; i<max_event; i++){
     for(int roc=0; roc<4; roc++){
          xpos[roc].push_back[i];
     {
}

I can use the xpos[0] because it has the maximum size!

for(int j=0; j<4; j++){
     for(int k=0; k < xpos[0].size(); k++) {                                               
          if(xpos[1][k] != 0. && xpos[2][k] != 0. && xpos[3][k] != 0.){
                 newxpos[j].(?)
          }
     } 
} 

? ==> I do not know how to call the elements of xpos[all] when all matches?

Thanks.

First Welcome to these forums.
Second generally its nice to put all code between [ CODE] [/code] brackets
Thirdly my memory's a little foggy on vectors but I don't believe there is a way to call all of the elements....You could just do it manually and save it into the new vector (if they all match then using only one of them will produce the same results).

[AdrianH]

Hi,

First of all I am a beginner in STL. Please apologies for any stupid mistakes!

No problem.

Right at the moment, I'm having trouble understanding what you are attempting. can you explain in words what it is you are trying to do?

Thanks,


Adrian

[kistan]

I have this vector xpos[4]. Each member (e.g. xpos[1]) in the vector has different sizes. I would like match them according the requirement that I need which is basically one element per each member. How can I access all these vector members and match them and after push_back them into a new vector.

Please look at the code I have in my first post.

Thanks.