How to fill the markers in a plot?

Hello all,

Can some one tell me how can I fill the markers in the plot. My code is as follows. Please help me.

Z = readtable('Experimental_data_botheq.xlsx') ;

Warning: Column headers from the file were modified to make them valid MATLAB identifiers before creating variable names for the table. The original column headers are saved in the VariableDescriptions property.
Set 'VariableNamingRule' to 'preserve' to use the original column headers as table variable names.

data = table2array(Z) ; 
plot(data(:,1), data(:,2), 'ko', 'linewidth', 2);
hold on
plot(data(:,3), data(:,4), 'ks', 'linewidth', 2);
hold on
plot(data(:,5), data(:,6), 'k^', 'linewidth', 2);
hold on
plot(data(:,7), data(:,8), 'kv', 'linewidth', 2);
hold on
plot(data(:,9), data(:,10), 'ko', 'linewidth', 2);
hold on
plot(data(:,11), data(:,12), 'ks', 'linewidth', 2);
hold on
plot(data(:,13), data(:,14), 'k^', 'linewidth', 2);
hold on
plot(data(:,15), data(:,16), 'kv', 'linewidth', 2);
hold off

Answer 1

[Matt J]

Z = readtable('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1147865/Experimental_data_botheq.xlsx') ;

Warning: Column headers from the file were modified to make them valid MATLAB identifiers before creating variable names for the table. The original column headers are saved in the VariableDescriptions property.
Set 'VariableNamingRule' to 'preserve' to use the original column headers as table variable names.

data = table2array(Z) ; 
plot(data(:,1), data(:,2), 'ko', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,3), data(:,4), 'ks', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,5), data(:,6), 'k^', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,7), data(:,8), 'kv', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,9), data(:,10), 'ko', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,11), data(:,12), 'ks', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,13), data(:,14), 'k^', 'linewidth', 2,'MarkerFaceColor','k');
hold on
plot(data(:,15), data(:,16), 'kv', 'linewidth', 2,'MarkerFaceColor','k');
hold off