explain plot(d,mean(data),'color',[0,0,0],'linewidth',3) in matlab

The code plot(d,mean(data),'color',[0,0,0],'linewidth',3) will plot a line graph of the mean of the data vector against the values in the d vector, with a line width of 3 and a color of black.

In more detail:

• d is the x-axis values to plot.
• mean(data) calculates the mean of the vector data, which is the y-axis values to plot.
• 'color',[0,0,0] sets the color of the line to black, by specifying RGB values of [0,0,0].
• 'linewidth',3 sets the width of the line to 3.

Together, this will plot a line graph of the mean of the data against d, with a black line of width 3.