How can I get from a vector index the iterator?

typedef std::vector< doubleTdoubleV;

doubleV xV;
doubleV yV;

// fill xV and yV with values (they have the same size)
....


for( SizeT i=0; i<yV->size(); ++i)
{
if( (*yV)[ i] <= 0.0)
{
yV->erase( ***what? ***); // want to erase yV[i]
xV->erase( ***what? ***); // want to earse xV[i]
}
}


I know I could iterate through an iterator.
But to much typing for xV then.

Thanks,
Marc

m_schellens@hotmail.com wrote:

How can I get from a vector index the iterator?
>
typedef std::vector< doubleTdoubleV;
>
doubleV xV;
doubleV yV;
>
// fill xV and yV with values (they have the same size)
...
>
>
for( SizeT i=0; i<yV->size(); ++i)

I think you mean:

for (doubleV::size_type i = 0; i<yV.size(); ++i)

{
if( (*yV)[ i] <= 0.0)

I think you mean:

if (yV[i]<=0.0)

{
yV->erase( ***what? ***); // want to erase yV[i]

yV.erase(yV.begin() + i);

xV->erase( ***what? ***); // want to earse xV[i]
}
}
>
>
I know I could iterate through an iterator.

Yes, that would make this easier and clearer.

But to much typing for xV then.

I don't understand what you mean.

Best regards,

Tom

<m_schellens@hotmail.comschrieb im Newsbeitrag
news:1155207729.680103.325640@q16g2000cwq.googlegr oups.com...

How can I get from a vector index the iterator?
>
typedef std::vector< doubleTdoubleV;
>
doubleV xV;
doubleV yV;
>
// fill xV and yV with values (they have the same size)
...
>
>
for( SizeT i=0; i<yV->size(); ++i)
{
if( (*yV)[ i] <= 0.0)
{
yV->erase( ***what? ***); // want to erase yV[i]
xV->erase( ***what? ***); // want to earse xV[i]

(yV->begin() + i) // gives a forward iterator, increased by 'i'
elements.

See also std::advance

m_schellens@hotmail.com wrote:

How can I get from a vector index the iterator?
>
typedef std::vector< doubleTdoubleV;
>
doubleV xV;
doubleV yV;
>
// fill xV and yV with values (they have the same size)
...
>
>
for( SizeT i=0; i<yV->size(); ++i)
{
if( (*yV)[ i] <= 0.0)
{
yV->erase( ***what? ***); // want to erase yV[i]

yV->erase(yV->begin() + i);

xV->erase( ***what? ***); // want to earse xV[i]

xV->erase(xV->begin() + i);

}
}
>
>
I know I could iterate through an iterator.
But to much typing for xV then.
>
Thanks,
Marc

Thank you all!

Thomas Tutone wrote:

m_schellens@hotmail.com wrote:

I actually meant:

doubleV* xV;
doubleV* yV;


Marc