How to link two bar charts in altair?
I'm having trouble with a fairly simple interaction because I don't understand the language of altair very much.
Say I have a dataframe containing the state, county and population.
I want to create one bar chart showing states and their populations and another showing counties and their populations.
Clicking on a state populates the next bar chart with county names, and their populations. Clicking away from any state in the first chart empties out the county chart again.
Simple master/detail or context/focus pair of charts.
Additonally, I'm not clear how to debug this either. Is there a way to print the selected state to the console?
Here is some data I pulled from wikipedia (unable to share actual work data):
State,County,Land Area
California,Los Angeles, 10510
Illinois,Cook, 2448
Texas,Harris, 4412
Arizona,Maricopa, 23828
California,San Diego, 10895
California,Orange, 2048
Florida,Miami-Dade, 4915
New York,Kings, 183
Texas,Dallas, 2257
New York,Queens, 281
California,Riverside, 18665
California,San Bernardino, 51947
When I click on the bar representing California in the first chart, the second chart should populate with Los Angeles, San Diego, Orange, Riverside and San Bernadino. When I click on New York in the first chart, the second chart should populate with Kings and Queens.
vega altair
asked Nov 21 at 3:24
Shahbaz
4,320144167
add a comment |
I'm having trouble with a fairly simple interaction because I don't understand the language of altair very much.
Say I have a dataframe containing the state, county and population.
I want to create one bar chart showing states and their populations and another showing counties and their populations.
Clicking on a state populates the next bar chart with county names, and their populations. Clicking away from any state in the first chart empties out the county chart again.
Simple master/detail or context/focus pair of charts.
Additonally, I'm not clear how to debug this either. Is there a way to print the selected state to the console?
Here is some data I pulled from wikipedia (unable to share actual work data):
State,County,Land Area
California,Los Angeles, 10510
Illinois,Cook, 2448
Texas,Harris, 4412
Arizona,Maricopa, 23828
California,San Diego, 10895
California,Orange, 2048
Florida,Miami-Dade, 4915
New York,Kings, 183
Texas,Dallas, 2257
New York,Queens, 281
California,Riverside, 18665
California,San Bernardino, 51947
When I click on the bar representing California in the first chart, the second chart should populate with Los Angeles, San Diego, Orange, Riverside and San Bernadino. When I click on New York in the first chart, the second chart should populate with Kings and Queens.
vega altair
asked Nov 21 at 3:24
Shahbaz
4,320144167
Hello, could you share some data? Here is a link that could be useful altair-viz.github.io/gallery/…
– FlorianGD
Nov 21 at 12:04
@FlorianGD added some test data. I saw the various interval selection examples but am not able to adapt them to code where a single click of a bar in Chart 1 changes chart 2.
– Shahbaz
Nov 21 at 15:36
add a comment |
I'm having trouble with a fairly simple interaction because I don't understand the language of altair very much.
Say I have a dataframe containing the state, county and population.
I want to create one bar chart showing states and their populations and another showing counties and their populations.
Clicking on a state populates the next bar chart with county names, and their populations. Clicking away from any state in the first chart empties out the county chart again.
Simple master/detail or context/focus pair of charts.
Additonally, I'm not clear how to debug this either. Is there a way to print the selected state to the console?
Here is some data I pulled from wikipedia (unable to share actual work data):
State,County,Land Area
California,Los Angeles, 10510
Illinois,Cook, 2448
Texas,Harris, 4412
Arizona,Maricopa, 23828
California,San Diego, 10895
California,Orange, 2048
Florida,Miami-Dade, 4915
New York,Kings, 183
Texas,Dallas, 2257
New York,Queens, 281
California,Riverside, 18665
California,San Bernardino, 51947
When I click on the bar representing California in the first chart, the second chart should populate with Los Angeles, San Diego, Orange, Riverside and San Bernadino. When I click on New York in the first chart, the second chart should populate with Kings and Queens.
vega altair
asked Nov 21 at 3:24
Shahbaz
4,320144167
I'm having trouble with a fairly simple interaction because I don't understand the language of altair very much.
Say I have a dataframe containing the state, county and population.
I want to create one bar chart showing states and their populations and another showing counties and their populations.
Clicking on a state populates the next bar chart with county names, and their populations. Clicking away from any state in the first chart empties out the county chart again.
Simple master/detail or context/focus pair of charts.
Additonally, I'm not clear how to debug this either. Is there a way to print the selected state to the console?
Here is some data I pulled from wikipedia (unable to share actual work data):
State,County,Land Area
California,Los Angeles, 10510
Illinois,Cook, 2448
Texas,Harris, 4412
Arizona,Maricopa, 23828
California,San Diego, 10895
California,Orange, 2048
Florida,Miami-Dade, 4915
New York,Kings, 183
Texas,Dallas, 2257
New York,Queens, 281
California,Riverside, 18665
California,San Bernardino, 51947
When I click on the bar representing California in the first chart, the second chart should populate with Los Angeles, San Diego, Orange, Riverside and San Bernadino. When I click on New York in the first chart, the second chart should populate with Kings and Queens.
vega altair
vega altair
asked Nov 21 at 3:24
Shahbaz
4,320144167
asked Nov 21 at 3:24
Shahbaz
4,320144167
edited Nov 21 at 15:35
asked Nov 21 at 3:24
Shahbaz
4,320144167
asked Nov 21 at 3:24
Shahbaz
4,320144167
asked Nov 21 at 3:24
Shahbaz
4,320144167
4,320144167
Hello, could you share some data? Here is a link that could be useful altair-viz.github.io/gallery/…
– FlorianGD
Nov 21 at 12:04
@FlorianGD added some test data. I saw the various interval selection examples but am not able to adapt them to code where a single click of a bar in Chart 1 changes chart 2.
– Shahbaz
Nov 21 at 15:36
add a comment |
Hello, could you share some data? Here is a link that could be useful altair-viz.github.io/gallery/…
– FlorianGD
Nov 21 at 12:04
@FlorianGD added some test data. I saw the various interval selection examples but am not able to adapt them to code where a single click of a bar in Chart 1 changes chart 2.
– Shahbaz
Nov 21 at 15:36
Hello, could you share some data? Here is a link that could be useful altair-viz.github.io/gallery/…
– FlorianGD
Nov 21 at 12:04
Hello, could you share some data? Here is a link that could be useful altair-viz.github.io/gallery/…
– FlorianGD
Nov 21 at 12:04
@FlorianGD added some test data. I saw the various interval selection examples but am not able to adapt them to code where a single click of a bar in Chart 1 changes chart 2.
– Shahbaz
Nov 21 at 15:36
@FlorianGD added some test data. I saw the various interval selection examples but am not able to adapt them to code where a single click of a bar in Chart 1 changes chart 2.
– Shahbaz
Nov 21 at 15:36
add a comment |
1 Answer
1
active
oldest
votes
This does what you want I believe. The idea is to create a selection on a chart, and use this to filter the second one.
import altair as alt
import pandas as pd
from io import StringIO
states_str = """State,County,Land Area
California,Los Angeles, 10510
Illinois,Cook, 2448
Texas,Harris, 4412
Arizona,Maricopa, 23828
California,San Diego, 10895
California,Orange, 2048
Florida,Miami-Dade, 4915
New York,Kings, 183
Texas,Dallas, 2257
New York,Queens, 281
California,Riverside, 18665
California,San Bernardino, 51947
"""
states_df = pd.read_csv(StringIO(states_str))
state_selector = alt.selection_multi(fields=['State'])
chart_states = alt.Chart(states_df).mark_bar().encode(
x=alt.X('State:N'),
y=alt.Y('count():Q')
).add_selection(state_selector)
chart_county = alt.Chart(states_df).mark_bar().encode(
x=alt.X('County:N'),
y=alt.Y('count():Q')
).transform_filter(state_selector)
chart_states | chart_county
Chart when nothing is selected
Chart after clicking on California on the first chart.
Created on 2018-11-21 by the reprexpy package
answered Nov 21 at 21:29
FlorianGD
999219
I hadn't thought of using selection_multi (instead of selection_single). I ended up building multi-level charts (think state, county, city). What an awesome tool and thanks for your hep.
– Shahbaz
Nov 22 at 2:01
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53404826%2fhow-to-link-two-bar-charts-in-altair%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
This does what you want I believe. The idea is to create a selection on a chart, and use this to filter the second one.
import altair as alt
import pandas as pd
from io import StringIO
states_str = """State,County,Land Area
California,Los Angeles, 10510
Illinois,Cook, 2448
Texas,Harris, 4412
Arizona,Maricopa, 23828
California,San Diego, 10895
California,Orange, 2048
Florida,Miami-Dade, 4915
New York,Kings, 183
Texas,Dallas, 2257
New York,Queens, 281
California,Riverside, 18665
California,San Bernardino, 51947
"""
states_df = pd.read_csv(StringIO(states_str))
state_selector = alt.selection_multi(fields=['State'])
chart_states = alt.Chart(states_df).mark_bar().encode(
x=alt.X('State:N'),
y=alt.Y('count():Q')
).add_selection(state_selector)
chart_county = alt.Chart(states_df).mark_bar().encode(
x=alt.X('County:N'),
y=alt.Y('count():Q')
).transform_filter(state_selector)
chart_states | chart_county
Chart when nothing is selected
Chart after clicking on California on the first chart.
Created on 2018-11-21 by the reprexpy package
answered Nov 21 at 21:29
FlorianGD
999219
I hadn't thought of using selection_multi (instead of selection_single). I ended up building multi-level charts (think state, county, city). What an awesome tool and thanks for your hep.
– Shahbaz
Nov 22 at 2:01
add a comment |
This does what you want I believe. The idea is to create a selection on a chart, and use this to filter the second one.
import altair as alt
import pandas as pd
from io import StringIO
states_str = """State,County,Land Area
California,Los Angeles, 10510
Illinois,Cook, 2448
Texas,Harris, 4412
Arizona,Maricopa, 23828
California,San Diego, 10895
California,Orange, 2048
Florida,Miami-Dade, 4915
New York,Kings, 183
Texas,Dallas, 2257
New York,Queens, 281
California,Riverside, 18665
California,San Bernardino, 51947
"""
states_df = pd.read_csv(StringIO(states_str))
state_selector = alt.selection_multi(fields=['State'])
chart_states = alt.Chart(states_df).mark_bar().encode(
x=alt.X('State:N'),
y=alt.Y('count():Q')
).add_selection(state_selector)
chart_county = alt.Chart(states_df).mark_bar().encode(
x=alt.X('County:N'),
y=alt.Y('count():Q')
).transform_filter(state_selector)
chart_states | chart_county
Chart when nothing is selected
Chart after clicking on California on the first chart.
Created on 2018-11-21 by the reprexpy package
answered Nov 21 at 21:29
FlorianGD
999219
I hadn't thought of using selection_multi (instead of selection_single). I ended up building multi-level charts (think state, county, city). What an awesome tool and thanks for your hep.
– Shahbaz
Nov 22 at 2:01
add a comment |
This does what you want I believe. The idea is to create a selection on a chart, and use this to filter the second one.
import altair as alt
import pandas as pd
from io import StringIO
states_str = """State,County,Land Area
California,Los Angeles, 10510
Illinois,Cook, 2448
Texas,Harris, 4412
Arizona,Maricopa, 23828
California,San Diego, 10895
California,Orange, 2048
Florida,Miami-Dade, 4915
New York,Kings, 183
Texas,Dallas, 2257
New York,Queens, 281
California,Riverside, 18665
California,San Bernardino, 51947
"""
states_df = pd.read_csv(StringIO(states_str))
state_selector = alt.selection_multi(fields=['State'])
chart_states = alt.Chart(states_df).mark_bar().encode(
x=alt.X('State:N'),
y=alt.Y('count():Q')
).add_selection(state_selector)
chart_county = alt.Chart(states_df).mark_bar().encode(
x=alt.X('County:N'),
y=alt.Y('count():Q')
).transform_filter(state_selector)
chart_states | chart_county
Chart when nothing is selected
Chart after clicking on California on the first chart.
Created on 2018-11-21 by the reprexpy package
answered Nov 21 at 21:29
FlorianGD
999219
This does what you want I believe. The idea is to create a selection on a chart, and use this to filter the second one.
import altair as alt
import pandas as pd
from io import StringIO
states_str = """State,County,Land Area
California,Los Angeles, 10510
Illinois,Cook, 2448
Texas,Harris, 4412
Arizona,Maricopa, 23828
California,San Diego, 10895
California,Orange, 2048
Florida,Miami-Dade, 4915
New York,Kings, 183
Texas,Dallas, 2257
New York,Queens, 281
California,Riverside, 18665
California,San Bernardino, 51947
"""
states_df = pd.read_csv(StringIO(states_str))
state_selector = alt.selection_multi(fields=['State'])
chart_states = alt.Chart(states_df).mark_bar().encode(
x=alt.X('State:N'),
y=alt.Y('count():Q')
).add_selection(state_selector)
chart_county = alt.Chart(states_df).mark_bar().encode(
x=alt.X('County:N'),
y=alt.Y('count():Q')
).transform_filter(state_selector)
chart_states | chart_county
Chart when nothing is selected
Chart after clicking on California on the first chart.
Created on 2018-11-21 by the reprexpy package
answered Nov 21 at 21:29
FlorianGD
999219
answered Nov 21 at 21:29
FlorianGD
999219
answered Nov 21 at 21:29
FlorianGD
999219
answered Nov 21 at 21:29
FlorianGD
999219
999219
I hadn't thought of using selection_multi (instead of selection_single). I ended up building multi-level charts (think state, county, city). What an awesome tool and thanks for your hep.
– Shahbaz
Nov 22 at 2:01
add a comment |
I hadn't thought of using selection_multi (instead of selection_single). I ended up building multi-level charts (think state, county, city). What an awesome tool and thanks for your hep.
– Shahbaz
Nov 22 at 2:01
I hadn't thought of using selection_multi (instead of selection_single). I ended up building multi-level charts (think state, county, city). What an awesome tool and thanks for your hep.
– Shahbaz
Nov 22 at 2:01
I hadn't thought of using selection_multi (instead of selection_single). I ended up building multi-level charts (think state, county, city). What an awesome tool and thanks for your hep.
– Shahbaz
Nov 22 at 2:01
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53404826%2fhow-to-link-two-bar-charts-in-altair%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Hello, could you share some data? Here is a link that could be useful altair-viz.github.io/gallery/…
– FlorianGD
Nov 21 at 12:04
@FlorianGD added some test data. I saw the various interval selection examples but am not able to adapt them to code where a single click of a bar in Chart 1 changes chart 2.
– Shahbaz
Nov 21 at 15:36