Histogram
Bar function can be used to draw a histogram, the histogram of the x-coordinate values of the required level, and each x-coordinate value corresponding to a y-coordinate value, thereby forming a columnar FIG.
Bar width is not a function of the width of a pixel, depending on how much the size of bar function of two-dimensional coordinate system, x-coordinate value and automatically determines the width of each column, and the width is a multiple of the width specified standard column width, the parameter value may be a float, such as 0.5, represents the width of the column is 0.5 times the standard width
# A histogram Import matplotlib.pyplot AS PLT X = [1997,1998,1999,2000 ] x_labels = [ ' 1997 ' , ' 1998 ' , ' 1999 ' , ' Year 2000 ' ] Y = [1000, 3000 , 4000,5000 ] plt.bar (X, Y, width = 0.1 ) plt.rcParams [ ' font.sans serif- ' ] = [ ' SimHei ' ] # for normal display Chinese label plt.xticks (x, x_labels) # set the scale of the x-axis, rotation angle of the rotation plt.xlabel ( ' year ' ) plt.ylabel ( ' volume ' ) plt.title ( ' according to FIG Comparative sales year ' ) plt.savefig ( ' histogram .jpg ' ) plt.show ()
Using a histogram bar and barh