Project - Data Handling and Interpolation

Aim:

Project: Data Handling and Interpolation

Objective:

In a laboratory experiment, data of voltage and current has been recorded and the same is attached in an excel file ( Click on this link 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 and store them in a text file.

Key Highlights:

Graphical solutions are more visual and appealing

• Interpolation of data
• Read excel file
• Write to text file
• Deliverables:

Find missing data and save it in text

• Interpolate the data set
• Save your program and attach the same
• Save txt file and upload in attachment

Theory:

Here we have used the command 'interp1' for interpolation. The output xq1 is put to the text file called 'interpolation'.

Code for interpolation:

fileID = fopen('interpolation.txt','w'); % Open the text file to write the output

x = ImAmp; % defining a variable x from excel file

y = VVolt; % defining a variable y from excel file

xq = [-17.3:0.1:0.9]; % defining the range for interpolation

xq1 = interp1(y,x,xq); % interpolation

figure(1);

plot(x,y,'o',xq,xq1,':'); % plotting the interpolation

grid;

fprintf(fileID,'%f','xq1'); % print the output xq1 to the text file

end

Workspace:

Output:

Result:

For reference:

Check the MATLAB file attached below

https://drive.google.com/file/d/1GjYwFw5swBLlPmJgBhEjuFzzOIA8jl44/view?usp=share_link