Matplotlib Basics

Question 1

How do you draw a plot using matplotlib?

Answer 1

From matplotlib import pyplot as plt
Plt.plot()

Question 2

What arguments does plt.plot() take and what do they mean?

Answer 2

Plt.plot() takes 2 main arguments, X and y values, then it can take additional arguments such as marker, colour,linewidth,label
X and y arguments decide how the plot looks, marker changes the way the line looks, colour changes the colour of the line, linewidth changes the weight of the line, label assigns a name that can later be displayed using plt.legend()

Question 3

How do you name X and y axis?

Answer 3

You can use plt.xlabel(‘name’) and plt.ylabel(‘name’) to do that

Question 4

How do you name the whole plot?

Answer 4

You can use plt.title(‘title’) to do that

Question 5

How can you display the labels

Answer 5

You can use plt.legend() to do that

Question 6

What arguments does plt.legend() take?

Answer 6

Plt.legend() takes loc= as argument, it can takes a string like ‘upper left’ as a value or a tuple which corresponds % of how far away from bottom left the legend should be, for example (0.02,0.05)

Question 7

How do you create a grid?

Answer 7

You can use plt.grid(True)

Question 8

How do you create a layout that fits on your display?

Answer 8

You can use plt.tight_layout()

Question 9

How can you save what you made on your disc?

Answer 9

Plt.savefig(‘’)

Question 10

How can you display the figure you made?

Answer 10

Plt.show()

Question 11

How can you create a bar?

Answer 11

Plt.bar()

Question 12

How can you create a horizontal bar plot

Answer 12

Plt.barh()

Question 13

How can you create a pie chart?

Answer 13

Plt.pie()

Question 14

What arguments can plt.pie() take and what do they do?

Answer 14

Labels,slices,colors,shadow,explode,wedgeprops={edgecolor:},startangle,autopct. Labels=labels names each slice, slices=slices sets a part for every slice, colors=colors sets a color for each slice, shadow=true creates a shadow for the pie, explode=Xplode gets one slice away from others. Autopct rounds the values

Question 15

How can you create a scatterplot?

Answer 15

plt.scatter()

Question 16

What arguments does scatterplot take and what do they change?

Answer 16

C,marker,alpha,edgecolor,cmap,s,X,y
C stands for color,s stands for size,marker changes the symbol, alpha sets how see through it is , X,y set coordinates, cmap sets the color scheme,edgecolor sets the color of the edge

Question 17

What’s a colorbar and how do you create it?

Answer 17

Colorbar is like a legend for the colours on the scatterplot
Clrbar= plt.colorbar()
Clrbar has it’s own functions for example clrbar.set_label(‘’)

Question 18

How would you change the X and y values to their logarithmic expressions

Answer 18

Plt.xscale(‘log’),plt.yscale(‘log’)

Question 19

How can you create a stack plot?

Answer 19

You can do that by using plt.stackplot()

Question 20

What arguments does the plt.stackplot() take?

Answer 20

X values , y values * n, labels,colors
X values argument sets X values there can only be one, yvalues set the y plane and are stacked on top of each other there can be multiple, labels=labels names the values, colors=colors gives the values set colors