If I add multiplication by a constant, the vectors are scattered well with the new values, but the numbers are not
This is something strange, May be you have to change the figure number to see the actual difference in numbers and/or values in separate figures. It seems you are using same figure number and perhaps inside a loop when viewing the outputs which can be confusing sometimes. According to your screenshots the numbers seemed to be plotted or displayed well after scaling with number 0.166. Do you actually want to use 1.66 instead ?
figure (1)
scatter(acd3sctrdata(1:end,1), acd3sctrdata(1:end,3), 'blue', 'filled')
hold on
scatter(acd45sctrdata(1:end,1), acd45sctrdata(1:end,3), 'red', 'filled')
scatter(3.5, [acd3means{10,2}], 10, 'blue', "filled")
e3=errorbar(3.5, [acd3means{10,2}],[acd3means{10,3}], 'x')
e3.Color= 'black';
scatter(1.5, [acd45means{10,2}], 10, 'red', "filled")
e45=errorbar(1.5, [acd45means{10,2}],[acd45means{10,3}], 'x')
e45.Color= 'black';
hold off
title('CD8+ CAR-T cells area of pixels > 1.5, upon aCD45(r) and aCD3(b)')
xlabel('aCD45 aCD3')
ylabel('Area of pixels > avg*1.5, um^2')
legend({'Blue = aCD3', 'Red = aCD45'},'Location','northwest')
figure (2) %// change the figure number
scatter(acd3sctrdata(1:end,1), acd3sctrdata(1:end,3)*0.166, 'blue', 'filled')
hold on
scatter(acd45sctrdata(1:end,1), acd45sctrdata(1:end,3)*0.166, 'red', 'filled')
scatter(3.5, [acd3means{10,2}]*0.166, 10, 'blue', "filled")
e3=errorbar(3.5, [acd3means{10,2}],[acd3means{10,3}]*0.166, 'x')
e3.Color= 'black';
scatter(1.5, [acd45means{10,2}]*0.166, 10, 'red', "filled")
e45=errorbar(1.5, [acd45means{10,2}],[acd45means{10,3}]*0.166, 'x')
e45.Color= 'black';
hold off
title('CD8+ CAR-T cells area of pixels > 1.5, upon aCD45(r) and aCD3(b)')
xlabel('aCD45 aCD3')
ylabel('Area of pixels > avg*1.5, um^2')
legend({'Blue = aCD3', 'Red = aCD45'},'Location','northwest')
