The function "xlsread" is able to read in the data from a sheet in an excel file. You can specify each sheet to read in through the second argument. You can manipulate the data from there.
>> raw = xlsread('myexcelspreadsheet.xlsx', 1); % read in sheet number 1
>> time = raw(:, 10);
>> data = raw(:, 11);
>> plot(time(30:60), data(30:60));
For more information on "xlsread" please consult the following documentation:
