need help to plot x,y data points with 'o' without line and y_hat smooth graph

function [m,n] = exp_n(x,y)
 X=x;Y=log(y);
Pn=polyfit(X,Y,1);

n=Pnfit_sq(1,1)
m=exp(Pnfit_sq(2))
tau = 1/a*-1
 
y_hat=c*exp(a*x);
 
end

%x=[0 .5 1 1.5 2 2.5 3 3.5 4 4.5 5];
%y=[0 -5.27 -8.10 -8.46 -6.38 -1.84 5.15 14.59 26.48 40.83 57.63];

[VBBV]

you have many undefined variables inside function, e.g. a, c Pnfit_sq ??

[VBBV]

define them inside function and then plot

[KSSV]

function y_hat = exp_n(x,y)
 X=x;Y=log(y);
Pn=polyfit(X,Y,1);

n=Pnfit_sq(1,1)
m=exp(Pnfit_sq(2))
tau = 1/a*-1
 
y_hat=c*exp(a*x);
 
end
plot(x,y_hat,'-o')
%x=[0 .5 1 1.5 2 2.5 3 3.5 4 4.5 5];
%y=[0 -5.27 -8.10 -8.46 -6.38 -1.84 5.15 14.59 26.48 40.83 57.63];

Answer 1

[Chirag Nighut]

You can use the plot function and use an option for styling the line plot to show the line as -o

plot(x,y_hat,'-o')

Above line of code should help.

To know more about plot line styles and other options please refer the following link:

https://www.mathworks.com/help/matlab/ref/plot.html#btzpnds-1