Assuming that shape sensitivity magnitude plus shape sensitivity x,y and z vector are saved quantities, you will need to scale the vectors to base the length on the log of the magnitude. Open the calculator and follow these steps: – Create a normalized vector of the shape sensitivity vector Norm_vect = Norm_vect(vector) – Store in a new variable the log magnitude of the vector logmag = log(shape sensitivity magnitude) – Re-scale the normalized vector Newvect = Norm_vect * logmag Now you can plot the Newvect vectors.