Challenge

Project - Data Handling and Interpolation

KKandibanda Akhil3 Aug 2022

Project :

In a laboratory experiment, data of voltage and current has been recorded and the same is attached in an excel file ( VI.xlsx ). Read the excel file in the Matlab program and perform the interpolation in the range of -17.3:0.1:0.9. Generate the interactive plot for the interpolated data. Additionally, compute the current values for given voltages below and store them in a text file.

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]’

Ans:

Coding:

clc;

clear all;

file=xlsread('VI.xlsx')

format compact;

V=file(:,1);

I=file(:,2);

x=-17.3:0.1:0.9;

y=interp1(V,I,x,'spline');

subplot(211);

plot(V,I,'o',x,y)

grid on

title('voltage vs current')

xlabel('voltage')

ylabel('current')

grid on;

VV=[-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];

II=interp1(V,I,VV);

z=[VV II];

fileID=fopen('VVII.txt','w');

fprintf(fileID,'%6s %12s\n','VV','II');

fprintf(fileID,'%6.2f% %12.8f\n',z);

fclose(fileID);

Results:

file =

-17.3000 -28.0000
-17.1000 -24.0000
-17.0000 -19.0000
-16.8000 -14.0000
-16.5000 -9.0000
-16.0000 -6.0000
-15.0000 -4.0000
-14.0000 -3.0000
-12.0000 -2.0000
-10.0000 -1.3000
-8.0000 -1.0000
-5.0000 -0.6000
-2.0000 -0.3000
-0.2000 -0.1000
0.0900 0
0.1900 0
0.2700 0
0.3900 0.0100
0.4300 0.0300
0.5000 0.1700
0.5500 0.4200
0.6000 1.2300
0.6200 1.9900
0.6500 3.9100

Waveforms:

Project - Data Handling and Interpolation

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Ship work like this
in your own course.