Matlab problem. I am able to sort the strains, but I cannot figure out how to sort the metals with the strains.

Problem Summary Hooke's Law is commonly used in models to predict the deformation of metals in response to applied forces. This formula relates the stress (the intensity of force) in a material to the strain (deformation per unit length) it is experiencing through the linear equation: where is the stress in the material in units of megapascals ( 1 MPa-10 Pascals) and is the strain which is generally unitless since the dimensions of this quantity are length/length. The constant E is the Modulus of Elasticity and represents the stiffness of the material due to it's molecular composition and structure. The value of E is characteristic of a specific material. The units of E can be seen from a dimensional analysis of Hooke's Law to be the same as those of stress, but the magnitudes are generally much larger so these units are expressed in gigapascals IGPa -10% MPa-109 Pa For loads applied axially to a metal bar as shown in the figure below, the stress, o, can be calculated using the formula Problem Summary Hooke's Law is commonly used in models to predict the deformation of metals in response to applied forces. This formula relates the stress (the intensity of force) in a material to the strain (deformation per unit length) it is experiencing through the linear equation: where is the stress in the material in units of megapascals ( 1 MPa-10 Pascals) and is the strain which is generally unitless since the dimensions of this quantity are length/length. The constant E is the Modulus of Elasticity and represents the stiffness of the material due to it's molecular composition and structure. The value of E is characteristic of a specific material. The units of E can be seen from a dimensional analysis of Hooke's Law to be the same as those of stress, but the magnitudes are generally much larger so these units are expressed in gigapascals IGPa -10% MPa-109 Pa For loads applied axially to a metal bar as shown in the figure below, the stress, o, can be calculated using the formula