Question

Basic line/scatter plot. Here you will import some data, plot it along with a best-fit trend line. (a) Import data from the file "lab06VoltageData.dat". The first column is current data in microamps. Please complete the details and requirements of this MATLAB project.

Answer 1

To import and plot the given voltage and current data in MATLAB, follow these steps: Read the data from the file 'lab06VoltageData.dat' using the importdata function. Assign the first column of the imported data to the variable 'volts' and the second column to the variable 'current'. Plot the 'current' values on the x-axis and the 'volts' values on the y-axis using the scatter function. To draw a best-fit trend line, calculate the coefficients of the least-squares regression line using the polyfit function. Add this line to the scatter plot using the plot function.

Step-by-step explanation:

To import and plot the given voltage and current data in MATLAB, follow these steps:

1. Read the data from the file 'lab06VoltageData.dat' using the importdata function.
2. Assign the first column of the imported data to the variable 'volts' and the second column to the variable 'current'.
3. Plot the 'current' values on the x-axis and the 'volts' values on the y-axis using the scatter function.
4. To draw a best-fit trend line, calculate the coefficients of the least-squares regression line using the polyfit function. Add this line to the scatter plot using the plot function.

Here is an example of how the MATLAB code could look like:

data = importdata('lab06VoltageData.dat');

volts = data(:, 1);

current = data(:, 2);

scatter(current, volts);

coefficients = polyfit(current, volts, 1);

trend_line = polyval(coefficients, current);

hold on;

plot(current, trend_line, 'r');

hold off;