Project - Data Handling and Interpolation

close all

clc

X=xlsread('VI.xlsx');

(In here we have read the Excel file into the Matlab)

V=X(:,1)

I=X(:,2)

(Defined both voltage and current variables in the excel file into the matlab)

xs=[-17.3:0.1:0.9]; ( Range of the interpolation)

Z1=interp1(V,I,xs) (Normal interpolation function for giving more clarity to the points in between the co ordinates)

Z2=interp1(V,I,xs,'spline') ( Spline interpolation for more specifying)

figure(1)

plot(V,I,'-',xs,Z1,'o')

figure(2)

plot(V,I,'-',xs,Z2,'o')

xlabel('Voltage')

ylabel('Current')

title('V vs I')

grid on

hold on

file=fopen('VI.txt','w')

fprintf(file,'%16s %16s\n',Z)

fclose(file);

we have saved this file into the system as VI in text format

RESULTS

(a)Normal Interpolation

(b)Spline interpolation