Hi,
You can use importdata to load file into workspace which gives you a structure with fields data and textdata. You can use cell2mat to convert cell array to string array.
T= importdata('marathon.xlsx');
gender=T.textdata(:,4);
gender=cell2mat(gender);% to convert cell array to string array
maleCount=size(find(gender=='M'),1);
femaleCount=size(find(gender=='F'),1);
Once you have male and female count you can easily create pie chart. Refer to this link to create pie chart.
