Vertigo could be either from a peripheral (labyrinth and vestibular nerve) or a central disorder (central nervous system). Central vertigo is usually a result of an abnormal processing of the vestibular sensory input by the central nervous system. See the image below.
scatterhist(x,y) creates a 2-D scatter plot of the data in vectors x and y, and displays the marginal distributions of x and y as univariate histograms on the horizontal and vertical axes of the scatter plot, respectively. example.
scatter(x,y) creates a scatter plot with circles at the locations specified by the vectors x and y. This type of graph is also known as a bubble plot. example. scatter(x,y,sz) specifies the circle sizes. To plot each circle with equal size, specify sz as a scalar. To plot each circle with a different size, specify sz as a vector with length equal to the length of x and y.