Project - Data Handling and Interpolation

 

 

% This project reads data from an excel sheet and do an interpolation of the

% required range of data

V=xlsread('C:\Users\J\Desktop\challenge 3 session,msges\last project\VI (1) data file interpolation project voltage vs current.xls',1,'A2:A25');

% Reading the values of voltage and storing them into vector V.

I=xlsread('C:\Users\J\Desktop\challenge 3 session,msges\last project\VI (1) data file interpolation project voltage vs current.xls',1,'B2:B25');

% Reading the values of current and storing them into vector I.

plot(V,I,'o'); % plotting V Vs I plot

hold on; % holding plot for overlapping

Vh=[-17.3:0.1:0.9]; % Range of interpolation.

Ih=spline(V,I,Vh);

plot(Vh,Ih,'r--'); % plotting interpolated Vh Vs Ih curve.

grid; %setting up the grid

xlabel(' Voltage V(Volt)');%labelling the plot

ylabel('Current I(mAmp)');

title('Interpolated V-I Curve');

legend('Given data plot','Interpolated data plot');

F=[Vh;Ih];

name='values of interpolated data'; % title of text file

Vh='Voltage(Volt)'; %labeling the coloumns of text file

Ih='Current(mAmp)';

fid = fopen('interpolateproject_prabhu_quest.txt','w'); %creating text file

fprintf(fid,'%s\n\n',name);

fprintf(fid,'%s %s\n',Vh,Ih);

fprintf(fid,'%f %f\n',F);

fclose(fid);

 

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output plot:

 

 

 

 

 

 

 

screenshot command window,plot:

 

 

 

 

data file saved text format : 

file 1:

 

 

 

 

file2:

 

 

 

file3:

 

 

file4:

 

 

 

 

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