The reason the plot from the code is not a continuous line curve but more of a scatter plot is because the y value specified in the “plot” function is a scalar (constant, as it is being calculated using “d”,”g”, and “f” which are all scalar) and the line specification ‘o’ creates circular markers instead of a line.
To fix this, the y values passed into the “plot” function should be a vector consisting of the function values at respective x-coordinate (values of “k”) and the line specifications should be ‘-’. Here’s a documentation link for the “plot” function which can help you:
