Yes, you can do this, but you will need to read in the entire excel file (or at least the entire dataset) first. Then just define what you need. You are only reading in one reflection column (B) of your excel sheet.
xlsdata=xlsread('Calcite.xlsx'); %reads entire file
Wavelength=xlsdata(6:2156,1);
for i=1:98 %or however many columns you need
reflection=xlsdata(6:2156,i+1); %starts with 2nd column, will go to number 99
figure(i)%to generate a new figure each time- this will make 98 plots
%do your plotting
end
