I have curve fitting in matlab. My graph were all good when not add scatter in the graph. However, when i add scatter coding, the graph were not remain it origin.

First photo: The graph that i want but not add scatter point.

Second photo: The graph when i add scatter coding.

I do not know what the problem here. It is for my final year project. Kindly ask for your help. This is the coding with adding scatter point:

scatter (prev_15AoA,prev_15CL,'o','filled','b');hold on
scatter (curr_15AoA,curr_15CL,'s','filled','b');hold on
scatter (prev_15AoA,prev_20CL,'^','filled','g');hold on
scatter (curr_15AoA,curr_20CL,'d','filled','g');hold on
scatter (prev_15AoA,prev25_CL,'>','filled','r');hold on
scatter (curr_15AoA,curr25_CL,'v','filled','r');hold on
f1 = fit(prev_15AoA,prev_15CL,'poly5')
f2 = fit(curr_15AoA,curr_15CL,'poly6')
plot(f1,'b')
plot(f2,'b--')
hold on 
f3 = fit(prev_15AoA,prev_20CL,'poly5')
f4 = fit(curr_15AoA,curr_20CL,'poly6')
plot(f3,'g')
plot(f4,'g--')

Answer 1

[Matt J]

It's hard to compare the two plots, because the x- and y-axes ranges are different in each. I suspect if you made the ranges the same, the plots will look the same.

[Matt J]

That is,

f1 = fit(prev_15AoA,prev_15CL,'poly5')
f2 = fit(curr_15AoA,curr_15CL,'poly6')
f3 = fit(prev_15AoA,prev_20CL,'poly5')
f4 = fit(curr_15AoA,curr_20CL,'poly6')

plot(f1,'b'); hold on
plot(f2,'b--');
plot(f3,'g');
plot(f4,'g--');

scatter (prev_15AoA,prev_15CL,'o','filled','b');
scatter (curr_15AoA,curr_15CL,'s','filled','b');
scatter (prev_15AoA,prev_20CL,'^','filled','g');
scatter (curr_15AoA,curr_20CL,'d','filled','g');
scatter (prev_15AoA,prev25_CL,'>','filled','r');
scatter (curr_15AoA,curr25_CL,'v','filled','r'); hold off

xlim([-0.2,1.2])
ylim([0,20])