Project - Data Handling and Interpolation

m=xlsread('VI.xlsx');%reading from excel file

v=[m(:,1)];%assigning voltage values as v

c=[m(:,2)];%assigning current values as c

w=[-17.2 -17.1 -13.8 -13.5 -13 -12.5 -11 -9 -5.76 -6 -1 0.11 0.25 0.5 0.61];%assigning w for values to which data to be found

x=[-17.3:0.1:0.9];%range

y=interp1(v,c,x,'spline');%interpolating voltage and current values

z=interp1(v,c,w,'spline');%interpolating same data and finding values of w

plot(v,c,'o',x,y,':.');grid;%plotting the values with a spline curve

title('VOLTAGE vs CURRENT INTERPOLATION');%labelling and annotation

xlabel('voltage');ylabel('current');

fid=fopen('currentvaluevv.txt','w');%opening and writing a text file and saving the current values for the given 'w'

l=length(z);

for i=1:l

fprintf(fid,'%f',z(i));

end

fclose(fid);