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A fixed joint has no element in the /joint_states/position array, as it cannot change from 0.0 (it's fixed, after all).
You could probably use the pose of your EEF as tracked by TF. Something like rosrun tf tf_echo CHAIN_START CHAIN_END (where CHAIN_START could be base_link and CHAIN_END the frame that represents your EEF) should give you the transform.
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A fixed joint has no element in the /joint_states/position array, as it cannot change from 0.0 (it's fixed, after all).
You could probably use the pose of your EEF as tracked by TF. Something like rosrun tf tf_echo CHAIN_START CHAIN_END (where CHAIN_START could be base_link and CHAIN_END the frame that represents your EEF) should give you the transform.
Edit:
how can i plot velocity of fixed joint ??
There is no entry in any of the arrays in a JointState message for fixed joints. Again: they are fixed. No velocity, acceleration or effort for these joints.
Note: I'm describing the typical situation (such as with joint_state_publisher with gui:=true). Whether all drivers do the same thing I cannot say, but it wouldn't make sense to me to publish joint values for something like a fixed joint.
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