Plotly

Question 1

What do you need to import?

Answer 1

import plotly.graph_objs as go
import chart_studio
import chart_studio.plotly as py
import plotly.offline as pyo
from plotly import tools

Question 2

How do you set credentials?

Answer 2

chart_studio.tools.set_credentials_file(username = ‘’, api_key = ‘’)

Question 3

How do you get the notebook to show visualisations within the notebook?

Answer 3

init_notebook_mode(connected= True)

Question 4

What do you need to import to work with plotly offline?

Answer 4

from plotly.offline import download_plotlyjs, init_notebook_mode, plot, iplot

Question 5

How do you generate a plot?

Answer 5

iplot(list or dictionary)

Question 6

How do you generate a scatter plot?

Answer 6

trace = go.Scatter(
x = example_x,
y = example_y,
mode = ‘markers’)

z = [trace]

iplot(z)

Question 7

How do you plot a pie chart?

Answer 7

fruit = ['apple', 'banana', 'cherry']
cost = [5,3,2]

trace = go.Pie(
labels = fruit,
values = cost)

z = [trace]

iplot(z)

Question 8

How do you get a tooltip on a pie chart?

Answer 8

hoverinfo = ‘label’

Question 9

How do you affect the data labels in a pie charts

Answer 9

textinfo = ‘label’

Question 10

What are the different options in hover and text info?

Answer 10

‘label+value+percent’

Question 11

What is the code to change the colours in a pie chart?

Answer 11

marker = dict(colors = z)

Question 12

What mode do you need to set to get a scatter to not have a line?

Answer 12

mode = ‘markers’

Question 13

What are the constituent parts of a graph?

Answer 13

trace (aka the data)
the layout
the figure

Question 14

How do you code the layout?

Answer 14

layout = go.Layout()

Question 15

How do you code the figure?

Answer 15

figure = go.Figure(data = [], layout = )

Question 16

How do you plot a figure?

Answer 16

iplot(figure, filename = ‘test’)

Question 17

What can you use within go.Layout?

Answer 17

title =

showlegend =

Question 18

How do you generate a bar char?

Answer 18

go.Bar(x = , y = )

Question 19

Can you have multiple traces in a chart?

Answer 19

Yes - within go.Figure pass a list

go.Figure(data = [data1,data2])

Question 20

How do you get a grouped bar chart?

Answer 20

go.Layout(barmode = ‘group’

Question 21

How do you plot a 3d scatter?

Answer 21

trace1 = go.Scatter3d()

Question 22

How do you change what the scatter points look like?

Answer 22

marker = dict(
        size = 12,
        color = z,
        colorscale = 'Viridis',
        opacity = 0.8)

Question 23

How do you change the margins?

Answer 23

go.Layout(margin = dict(l=0,r=0,t=0,b=0)

Question 24

showlegend or show_legend?

Answer 24

showlegend

Question 25

barmode = 'group' or barmode = 'grouped'

Answer 25

barmode = 'group'

Question 26

How do you name a legend?

Answer 26

In trace, name = ''

Question 27

How do you get a graph to go to chart studio

Answer 27

py.iplot() but you must have imported chart.studio.plotly as py

Question 28

How do you change the background color?

Answer 28

plot_bgcolor = 'white'

Question 29

If you want to change the colour of the line in the scatter what do you use?

Answer 29

trace1 = go.Scatter(x = df1['date'], y = df1['high'], line = dict(color = 'red'), name = 'high')

Question 30

When in atom, iplot or plot?

Answer 30

plot

Question 31

How do you change the settings of axis titles

Answer 31

In layout; xaxis = dict(title = 'x')

Question 32

How do you change the shape in a scatter?

Answer 32

Within marker dictionary; symbol =

Question 33

How do you get a line chart?

Answer 33

go.Scatter(mode = 'lines')

Question 34

What are the options in a line chart?

Answer 34

lines markers lines+markers

Question 35

How do you get a stacked barchart?

Answer 35

In layout, barmode = 'stack'

Question 36

How do you change the orientation of a bar char to be horizontal?

Answer 36

within go.Bar orientation = 'h'

Question 37

How do you generate multiple traces without writing it all out?

Answer 37

``` list = ['Strongly Agree', 'Somewhat Agree', 'Neutral', 'Somewhat Disagree','Strongly Disagree'] data = [] for x in list: trace = go.Bar( x = df1.index, y = df1[x], name = x ) data.append(trace) ```

Question 38

How do you get a bubble chart?

Answer 38

go.Scatter(marker = dict(size = df1['cylinder']))

Question 39

How do you adjust the size of the bubble?

Answer 39

Multiply / divide the values to get to a sensible number

Question 40

How do you change what what the hover contains

Answer 40

within go.Scatter(text = df['name'])

Question 41

How do you change the colour within a bubble chart?

Answer 41

marker = dict(color = df['cylinder'])

Question 42

How do you add a key to a bubble chart

Answer 42

marker = dict(showscale = True)

Question 43

How do you change which data point gets selected?

Answer 43

Within layout hovermode = 'closest'

Question 44

How do you generate a boxplot?

Answer 44

go.Box()

Question 45

How do you mark every point on a boxplot?

Answer 45

go.Box(boxpoints = 'all')

Question 46

How do you space out the boxpoints to make it clearer?

Answer 46

go.Box(jitter = 0.3)

Question 47

How do you determine where the boxpoints sit on the graph?

Answer 47

go.Box(pointpos=0) Positive is to the right, negative is to the left

Question 48

How do you show outliers in a boxplot?

Answer 48

go.Box(boxpoints = 'outliers')

Question 49

How do you do a histogram?

Answer 49

go.Histogram(x = df1['x'], xbins = dict(start = , end =, size = ))

Question 50

How do you set histogram bins?

Answer 50

xbins = dict(start = , end =, size = )

Question 51

How do you do a distributino plot?

Answer 51

fig = ff.create_distplot(hist_data, group_labels, bin_size = [])

Question 52

What do you need to import for a distribution plot?

Answer 52

import plotly.figure_factory as ff

Question 53

Can you have multiple series for distplot?

Answer 53

Yes - add them as different items within a list

Question 54

What is the code for a heatmap?

Answer 54

go.Heatmap(x = , y=, z= , colorscale = )

Question 55

To add the color for a heatmap (z=) what is the format?

Answer 55

A python list

Question 56

How do you make a python list for the colour of a heatmap?

Answer 56

df['x']. values.tolist()

Question 57

How do you set the limits of the colour scale

Answer 57

go.Heatmap(x =, y=, z=, colourscale =, zmin = , zmax = )

Question 58

How do you create subplots?

Answer 58

fig = tools.make_subplots(rows = , cols =, subplot_titles=[], shared_yaxes = True)

Question 59

Once you've created subplot, how do you add the data?

Answer 59

fig. append_trace(trace1,1,1) | fig. append_trace(trace2,1,2)

Question 60

When using subplots, do you create the trace and figure in the normal way?

Answer 60

No you create the figure then append the data

Question 61

When using subplot, do you have to tell plotly where to put it?

Answer 61

Yes and index starts at 1