I have I need help for this matlab program: I have a data .txt file with fuel consumption of a plane flight at every minute. I put that data into a new matrix using a for loop. So, the data is in pounds at the moment.

first I am confused on how to put the new matrix into another matrix in pounds/seconds(average fuel flow)

Lastly: I need to help calculating how many minutes did the climb phase of the flight last when the fuel flow rate is at least 1.5 times the average flow rate during takeoff and climb. How do I restrict the first half of the dataset?