Project - Data Handling and Interpolation

Project Answer:-

Interpolation:-

• interpolation is method for adding new data points within a range of setb known data points, by using the interpolation fill the missing data,arrange predictions & smooth existing data etc , interpolation is divided into technique for data points on grid and scattered data points.
• In engineering applications we run in to situation where some x-y data might not availabe.
• In those situations we can use interpolation to determine the 'y' values corresponding to a specific set of 'x' values.
• Matlab functions to help with interpolation are: a) interp1 & b) interp2.

% Import the data

fileid1=xlsread('VI.xlsx','sheet1','A2:B25');

Vvolt=fileid1(:,1);

Iamp=fileid1(:,2);

ip=[-17.3:0.1:0.9] %%data interpolation range.

x=interp1(Vvolt,Iamp,ip);

x1=interp1(Vvolt,Iamp,ip,'spline');

figure(1);

plot(Vvolt,Iamp,'ob',ip,x,'+');

xlabel('voltage')

ylabel('current')

legend('Vvolt','Iamp');

grid;

figure(2)

plot(Vvolt,Iamp,'g',ip,x,'*');

xlabel('voltage');

ylabel('current');

legend('Vvolt','Iamp');

fileid=fopen('C:\Users\amdni\OneDrive\Desktop\matlab_project3.txt','w');

save x1.txt;

save x1.mat;

save x.txt;

save x.mat;