Two x-axis for the same plot line

Question

评论： Mohamed Abdelhamid 2019-10-1

I have a plot of power as a function of a force P(F) with the power P on the y-axis and the force F on the x-axis.

As acceleration is kept constant, is there a way to add another x-axis on top of the plot representing the mass m knowing that F=m·a?

It would be like copying the x-axis multiplied by the value of the constant acceleration as two ways of interpreting the data P(F) and P(m).

It would be like having two units in two different x-axis for the same data.

Thank you!

Rik 2017-11-20

I know there is a method to add a second y axis, but a second x would be new to me. Why not just add the second unit in the text of the xticklabels?

Answer 1

KL 2017-11-20

If you have R2014b or later, just like utilizing both sides of the y axis, you can also use top and bottom side of x axis.

FYI: This method only works with 'line' function. It doesn't work with 'plot'.