Project - Data Handling and Interpolation

VI=readtable('VI.xlsx');

%VI is excel file read

V=xlsread("VI.xlsx",1,'A2:A25');

%V is voltage data from excel file

I=xlsread("VI.xlsx",1,'B2:B25');

% I is current data from excel file

p0=input('missing value or add value V :');

%p0 find out missing data i.e 0.1 or 0.9

n=length(V);

%n is length or number of value

%AX=B X=inv(A)*B

B=I;

for i=1:n

for j=1:n
A(i,j)=V(i)^(j-1);
end
end

Q=A\B

%A\STAND FOR INVERSE OF A

P=flipud(Q)

AA=polyval(P,p0)
%AA is missing value(I)

X=linspace(V(1),V(n),100);

Y=polyval(P,X);

plot(X,Y,'--')

hold on

plot(V,I,'o')

hold on

plot(p0,AA,'*r')

%missing point is *in red color