Project - Data Handling and Interpolation

project:-

%% first ploting of V VS I graph by importing data from execl sheet

FID=xlsread('VI.xlsx');%opening of excel shhet

V=FID(:,1);%storing value present in all rows and first coloumn

I=FID(:,2);%storing value present in all rows and second coloumn

Z=-17.3:.1:.9;%interpolation in the range of -17.3:0.1:0.9

Y=interp1(V,I,Z,"linear");%performing interpolation and storing in Y

figure(1);%Giving name to plotting as figure 1

plot(V,I,'o',Z,Y,'*');%using plot function to plot first V VS I with o and Z vs Y with *

grid on;%grid on plot

title('VOLTAGE VS CURRENT');%title on plot

xlabel('voltage');% x-axis name

ylabel('current');% y-axis name

grid on;

%% storing of data in txt file by calculating from interpolation

VV=[-17.2

-17.1

13.8

13.5

13.0

12.5

11

-9

5.76

6

-1

0.11

0.25

0.5

0.61];%given value

II=interp1(V,I,VV,"linear");% II IS INTERPOLATING W.R.T V AND I TO CONSIDERING VV

X=[VV II]% STORING THE VALUE OF VV AND II in matrix form

store=fopen('VV_VS_II.txt','w');%using fopen function to store the value in txt file by giving write (w) permission

fprintf(store,'%6s%12s\n','VV','II');%first print VV and II

fprintf(store,'%6.2f%12.2f\n',X);%then print Z

fclose(store);%closing of file