How to add Error Bars in fit curve line graph?

Hey!

I want to put Error Bars in my line graph, I am using " fit " function on my data to smooth curves. And it is working fine. But I dont know how to put error bars on line graph while using ' fit " function. Below is the attached file of the dataset I am using and code.

clear all
clc

load('MCA_Disjoint_SegmentWise.mat')

Data1LDA = MCA_Disjoint(: , 1);
Data2LDA = MCA_Disjoint(: , 3);
Data3LDA = MCA_Disjoint(: , 5);



WindowSizes = 50:25:450;
WindowSizes = WindowSizes';

f1=fit(WindowSizes,Data1LDA,'cubicinterp');
f2=fit(WindowSizes,Data2LDA,'cubicinterp');
f3=fit(WindowSizes,Data3LDA,'cubicinterp');






figure

hold on
p(1,:) = plot(f1,WindowSizes,Data1LDA);
p(2,:) = plot(f2,WindowSizes,Data2LDA);
p(3,:) = plot(f3,WindowSizes,Data3LDA);



set(p(1,:),'LineWidth',2,...
    'Color','black',...
    'MarkerEdgeColor','k',...
    'MarkerFaceColor',[.49 1 .63],...
    'MarkerSize',20)

set(p(2,:),'LineWidth',2,...
    'Color','red',...
    'MarkerEdgeColor','r',...
    'MarkerFaceColor',[.49 1 .63],...
    'MarkerSize',20)

set(p(3,:),'LineWidth',2,...
    'Color','blue',...
    'MarkerEdgeColor','b',...
    'MarkerFaceColor',[.49 1 .63],...
    'MarkerSize',20)