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 plots are useful data visualization tools for illustrating a trend. 1  If the vertical (or y-axis) variable increases as the horizontal (or x-axis) variable increases, the correlation is positive.  If the y-axis variable decreases as the x-axis variable increases or vice-versa, the correlation is negative.