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from matplotlib.colors import ListedColormap def plot _ decision _ regions ( X , y , classifier, resolution = 0 . 0 2 ) : #
from matplotlib.colors import ListedColormap
def plotdecisionregionsX y classifier, resolution:
# setup marker generator and color map
markers soPv
colors red 'blue', 'lightgreen', 'gray', 'cyan'
cmap ListedColormapcolors:lennpuniquey
# plot the decision surface
xmin, xmax X:min X:max
xmin, xmax X:min X:max
xx xx npmeshgridnparangexmin, xmax, resolution
nparangexmin, xmax, resolution
Z classifier.predictnparrayxxravel xxravelT
Z Zreshapexxshape
pltcontourfxx xx Z alpha cmapcmap
pltxlimxxmin xxmax
pltylimxxmin xxmax
# plot class examples
for idx, cl in enumeratenpuniquey:
pltscatterxXy cl
yXy cl
alpha
ccolorsidx
markermarkersidx
labelcl
edgecolor'black'
plotdecisionregionsX y classifierppn
pltxlabelsepal length cm
pltylabelpetal length cm
pltlegendloc'upper left'
# pltsavefigimagespng dpi
pltshow
Using the above, give code that plots the decision regions for the first epochs. Use learning rate and random seed when applicable.
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