Project - Data Handling and Interpolation

lab_data = xlsread("VI.xlsx"); %reading data from .xls file

V = lab_data(:,1); %storing the voltage

I = lab_data(:,2); %storing the current

r = [-17.3:0.1:0.9]; %setting the range

inter = interp1(V,I,r); %using interpolation function

plot(V,I,'o',r,inter,'b--'); %to plot the graph

grid;

title('Interpolated data');

xlabel('I');

ylabel('V');

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];

h = V / I; %equation to find resistance

R = h(:,1); %storing resistance

j = VV / R; %equation to find current

II = j(:,1); %storing current

new = fopen('VVII.txt','w'); %openingn a .txt file

fprintf(new,'Voltage \n'); %writing the .txt file

fprintf(new,'%f \n',VV);

fprintf(new,'\n Current \n');

fprintf(new,'%f \n',II);

fclose(new); %closing the .txt file