Project - Data Handling and Interpolation

clc %%to clear screen

clear all %%to clear workspace

[data]=xlsread('MATLAB_PROJECT.xlsx'); %%to read excel file

x=data(:,1); %%to access voltage data

v=data(:,2); %%to access current data

xq=-17.3:0.1:0.9; %%to asign query points

figure(1) %%to depicts figure

vq1=interp1(x,v,xq); %%to interpolation

plot(x,v,'*r',xq,vq1,'-b'); %%to plot the interpolation

ylim([-28 4]); %%limit of y

xlim([-17 1]); %%limit of x

grid %%grid of plot

title('Interpolation'); %%title

hold on %%to hold the plot

vq2 = interp1(x,v,xq,'spline'); %%to spline interpolation

plot(x,v,'*r',xq,vq2,'-b'); %%to plot the interpolation

ylim([-28 4]); %%limit of y

xlim([-17 1]); %%limit of x

grid %%grid of plot

xlabel('VOLTAGE'); %%labelling of x

ylabel('CURRENT'); %%labelling of y

legend({'Linear Interplation','Spline Interpolation'},'location','southeast'); %%to show variation of plot

fileID=fopen('projecttext.txt','w'); %%command for written in text file

fprintf(fileID,'%f \t','vq1','vq2'); %%to print interpolation in text file

fclose(fileID); %%to closed the file

OUTPUT:-