creating graph via matlab

hello I bulit in mathlab a small progrem that get excel file with two column and create a graph with x and y values (the values are from the excel) I need to make some changes in this small program 1. X- axis should in 10 scal 2. I need to create a new gragh from anthor excel file that will be plot on the same figure 3. if you see in the attach file there are two graph data point and cubic spline I want to add anther graph. 4. the data point will get each few mintus new excel data and will have to be changed. 5. when you click on each point you will get the the x and y value of that point.