The graph shown is plotted ductility Vs Time period of a system for four diifferent Ry . What i needed is to find the Ry s for particular ductility demand ( say 2) for the time period varying from 0 to 20 as shown in the graph. The Ry s need to find out using interpolation of the given graphs ( ie, in between the four Ry s given). can someone help with this problem??
Ok, since you have all the data used to create the plot, you will just use the X and Y values as inputs to the interp1 function. For example, if I wanted to interpolate the values of each curve at T(s)=7, I would add the following to the bottom of your check.m script.