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ROS_INFO("pata actual %d position %.2f", i, patas_posicion_actual);

I'm not sure, but I don't think you can just pass a std::vector to ROS_INFO(..) and expect it to print anything.

It could well be that the 0.00 you are seeing is actually just garbage memory that happens to evaluate to a 0.00 double.

Try this:

ROS_INFO("pata actual %d position %.2f", i, patas_posicion_actual[i]);

(note the [i] to index into the vector).

I'm not sure, but I don't think you can just pass a std::vector to ROS_INFO(..) and expect it to print anything.

It could well be that the 0.00 you are seeing is actually just garbage memory that happens to evaluate to a 0.00 double.

Try this:

ROS_INFO("pata actual %d position %.2f", i, patas_posicion_actual[i]);

(note the [i] to index into the vector).