You have two general options.
- Place all your code for a single file into a for loop that will loop through each of your 62 files. Use "hold on" to add additional lines to your plot.
- Create an array for each variable you want to plot. Place the results from each file into a single column. Once completed for all files, call the plot command using the X and Y arrays. Each column will be treated as a separate series. However, this approach will only work if you have the same number of values in your plot variables for every file.
