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Convert from Int32MultiArray into vector (roscpp)

asked 2016-02-13 14:33:48 -0600

user23fj239 gravatar image

How to simply put array from the std_msgs into vector<double>

 void setdot(const std_msgs::Int32MultiArray::ConstPtr& arr){
    vector<double> tmp;

error: invalid use of void expression if i compile it.

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answered 2016-02-13 14:52:39 -0600

user23fj239 gravatar image

updated 2016-02-13 15:49:38 -0600

For anyone who is interested I had a look at this, which converts the std_msgs into an Array but this is how the vector is done:

    void setdot(const std_msgs::Int32MultiArray::ConstPtr& array){
    vector<double> tmp;
    for(std::vector<int>::const_iterator it = array->data.begin(); it != array->data.end(); ++it)
        tmp.push_back( *it);
    //do sth with tmp ..

Furthermore check if the input message is not empty, which might occur on the first callbacks as it was in my case.
Otherwise Segmentation fault (core dumped) might happen.

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Asked: 2016-02-13 14:33:48 -0600

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Last updated: Feb 13 '16