Introduction to Statistics and Geographic Data
Presenting Data
Histograms
Histograms are graphs that show the frequency of occurrences of values or ranges of values (bins). Histograms are one of the most important wa[AS1] ys to display datasets. Histograms allow us to ascertain the distribution of data and determine the probability of a value occurring. A special type of spatial histograms is directional histograms, also known as rose diagrams. Rose diagrams are directional frequency plots, using degrees from north as bins. 
Histograms tell us how frequently things happen in different categories (bins). This histogram counts the frequency of hit Christmas songs for each decade, where the bins are decades.xkcd

Scatter Plots
Scatter plots are pointbased graphs that show the values 2 or 3 variables for a datapoint. An example is a map showing points with x and y coordinates. Scatterplots are good for visualizing correlation between two variables. Generally, on a scatterplot, the independent variable is on the x axis and the dependent variable is on the y axis.
Scatter plots are pointbased graphs that show the values 2 or 3 variables for a datapoint. An example is a map showing points with x and y coordinates. Scatterplots are good for visualizing correlation between two variables. Generally, on a scatterplot, the independent variable is on the x axis and the dependent variable is on the y axis.