Pylab Plotting data Formatting lines Controlling figure windows

- solid line -- dashed line-. dash-dot line : dotted line. points , pixelso circle symbols ^ triangle up symbolsv triangle down symbols < triangle left symbols> triangle right symbols s square symbols+ plus symbols x cross symbolsD diamond symbolsb blue g greenr red c cyanm magenta y yellowk black w whiteTable 1: Some of the available format characters for changing the line style, data point symbolsand colours.Example The following commands create two figures, plot x 2 and x 4 on the first figure and plotx 3 on the second figure.from __future__ import divisionfrom scipy import *import pylabx = linspace(0, 1, 100)pylab.figure(1)# Create the first figurepylab.plot(x, x**2) # Plot on Figure 1pylab.figure(2)# Create the second figurepylab.plot(x, x**3) # Plot on Figure 2pylab.figure(1) # Return to Figure 1pylab.plot(x, x**4) # Plot on Figure 1pylab.show()Changing the axesThe axis command is used to change the ranges of the x and y axes. Callingpylab.axis([xmin, xmax, ymin, ymax])sets the ranges. Calling axis() without any parameters returns the current x and y ranges. Youcan also use the functions xlim and ylim to set the range of only one of the axes.By default Pylab scales the axes so that all of the data fits on the plot window. This meansthat the x and y might have different length scales. This behaviour can be changed with thefollowing commands.• axis(’equal’) sets the x and y axes to have the same scale. This will make a circle lookcircular.• axis(’scaled’) also makes a circle look circular, but does it by changing the dimensionsof the plot window (and not the axes).2