Questions tagged [charts]
Charts are a graphical representation of data, most often in the format of a graph or diagram. Use this tag for questions about using a charting library API.
charts
55,513
questions
1590
votes
18
answers
290k
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Cycles in family tree software
I am the developer of some family tree software (written in C++ and Qt). I had no problems until one of my customers mailed me a bug report. The problem is that the customer has two children with ...
- 11.1k
464
votes
10
answers
315k
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Generating statistics from Git repository [closed]
I'm looking for some good tools/scripts that allow me to generate a few statistics from a git repository. I've seen this feature on some code hosting sites, and they contained information like...
...
- 19.8k
391
votes
8
answers
270k
views
Python Graph Library [closed]
I'm writing a python application that will make heavy use of a graph data structure. Nothing horribly complex, but I'm thinking some sort of graph/graph-algorithms library would help me out. I've ...
- 4,466
369
votes
5
answers
635k
views
Plotting two variables as lines using ggplot2 on the same graph
A very newbish question, but say I have data like this:
test_data <-
data.frame(
var0 = 100 + c(0, cumsum(runif(49, -20, 20))),
var1 = 150 + c(0, cumsum(runif(49, -10, 10))),
date = ...
- 57.9k
336
votes
13
answers
183k
views
Generating a PNG with matplotlib when DISPLAY is undefined
I am trying to use networkx with Python. When I run this program it get this error. Is there anything missing?
#!/usr/bin/env python
import networkx as nx
import matplotlib
import matplotlib.pyplot
...
- 7,098
237
votes
18
answers
220k
views
Good Java graph algorithm library? [closed]
Has anyone had good experiences with any Java libraries for Graph algorithms. I've tried JGraph and found it ok, and there are a lot of different ones in google. Are there any that people are actually ...
223
votes
29
answers
295k
views
JavaScript Chart Library
Would anyone recommend a particular JavaScript charting library - specifically one that doesn't use flash at all?
216
votes
6
answers
735k
views
Set Colorbar Range
I have the following code:
import matplotlib.pyplot as plt
cdict = {
'red' : ( (0.0, 0.25, .25), (0.02, .59, .59), (1., 1., 1.)),
'green': ( (0.0, 0.0, 0.0), (0.02, .45, .45), (1., .97, .97)),
...
- 16.5k
201
votes
12
answers
299k
views
WPF chart controls [closed]
I am looking for a very simple WPF chart which should have a 2D graph and
should have pan and zoom facilities .
184
votes
17
answers
470k
views
Dynamically update values of a chartjs chart
I created an basic bar chart using chartjs and it works fine. Now I want to update the values on a time based interval. My problem is that after I created the chart, I do not know how to update its ...
- 2,029
181
votes
10
answers
174k
views
Force R to stop plotting abbreviated axis labels (scientific notation) - e.g. 1e+00
In ggplot2 how can I stop axis labels being abbreviated - e.g. 1e+00, 1e+01 along the x axis once plotted? Ideally, I want to force R to display the actual values which in this case would be 1,10.
...
- 2,601
179
votes
12
answers
89k
views
How does Dijkstra's Algorithm and A-Star compare?
I was looking at what the guys in the Mario AI Competition have been doing and some of them have built some pretty neat Mario bots utilizing the A* (A-Star) Pathing Algorithm.
(Video of Mario A* ...
- 66.8k
178
votes
14
answers
135k
views
Command-line Unix ASCII-based charting / plotting tool
Is there a good command-line UNIX charting / graphing / plotting tool out there? I'm looking for something that will plot xy points on an ASCII graph.
Just to clarify, I'm looking for something that ...
- 12.6k
176
votes
7
answers
151k
views
Remove padding or margins from Google Charts
// Load the Visualization API and the piechart package.
google.load('visualization', '1.0', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
...
- 1,763
170
votes
4
answers
204k
views
how to set start value as "0" in chartjs?
here is my code. i need to set initial value as "0" in both x and y axis scales. I have tried latest version scales option.
graphOptions = {
///Boolean - Whether grid ...
- 2,428
166
votes
8
answers
210k
views
Removing legend on charts with chart.js v2
I'm making a homepage using, Bootstrap, JQuery and Chart.js (v2). I had my implementation working using v1, but recently just got into Bower and downloaded v2 using that.
I'm making a grid of 4 ...
- 5,196
165
votes
11
answers
192k
views
What is better, adjacency lists or adjacency matrices for graph problems in C++?
What is better, adjacency lists or adjacency matrix, for graph problems in C++?
What are the advantages and disadvantages of each?
- 1,741
164
votes
7
answers
285k
views
how to draw directed graphs using networkx in python?
I have some nodes coming from a script that I want to map on to a graph. In the below, I want to use Arrow to go from A to D and probably have the edge colored too in (red or something).
This is ...
- 30.7k
162
votes
17
answers
131k
views
Dependency graph of Visual Studio projects
I'm currently migrating a big solution (~70 projects) from VS 2005 + .NET 2.0 to VS 2008 + .NET 3.5. Currently I have VS 2008 + .NET 2.0.
The problem is that I need to move projects one by one to new ...
- 8,331
162
votes
5
answers
724k
views
How to plot multiple functions on the same figure
How can I plot the following 3 functions (i.e. sin, cos and the addition), on the domain t, in the same figure?
import numpy as np
import matplotlib.pyplot as plt
t = np.linspace(0, 2*np.pi, 400)
a =...
- 1,987
161
votes
4
answers
151k
views
Representing graphs (data structure) in Python
How can one neatly represent a graph in Python? (Starting from scratch i.e. no libraries!)What data structure (e.g. dicts/tuples/dict(tuples)) will be fast but also memory efficient?One must be able ...
- 13.2k
158
votes
7
answers
213k
views
How to trace the path in a Breadth-First Search?
How do you trace the path of a Breadth-First Search, such that in the following example:
If searching for key 11, return the shortest list connecting 1 to 11.
[1, 4, 7, 11]
- 5,793
156
votes
7
answers
77k
views
Why use Dijkstra's Algorithm if Breadth First Search (BFS) can do the same thing faster?
Both can be used to find the shortest path from single source. BFS runs in O(E+V), while Dijkstra's runs in O((V+E)*log(V)).
Also, I've seen Dijkstra used a lot like in routing protocols.
Thus, why ...
- 1,563
150
votes
3
answers
199k
views
Move X-Axis label downwards, but not X-Axis Ticks in matplotlib
I'm using Matplotlib to plot a histogram.
Using tips from my previous question: Matplotlib - label each bin,
I've more or less got the kinks worked out.
There's one final issue - previously - the x-...
- 17.1k
146
votes
3
answers
151k
views
PHP MySQL Google Chart JSON - Complete Example [closed]
I have searched a lot to find a good example for generating a Google Chart using MySQL table data as the data source. I searched for a couple of days and realised that there are few examples available ...
- 12.1k
144
votes
23
answers
264k
views
Destroy chart.js bar graph to redraw other graph in same <canvas>
I am using the Chart.js library to draw a bar graph, it is working fine, but now I want to destroy the bar graph and make a line graph in the same canvas. I have tried these two ways to clear the ...
- 3,488
142
votes
10
answers
229k
views
What is the best open-source java charting library? (other than jfreechart) [closed]
Why are there not more opensource easy to use charting libraries for Java?. The only successful opensource project in this area seems to be jfreechart, and it doesn't even have any documentation or ...
140
votes
11
answers
219k
views
In Chart.js set chart title, name of x axis and y axis?
Does Chart.js (documentation) have option for datasets to set name (title) of chart (e.g. Temperature in my City), name of x axis (e.g. Days) and name of y axis (e.g. Temperature). Or I should solve ...
- 2,428
140
votes
23
answers
198k
views
How to clear a chart from a canvas so that hover events cannot be triggered?
I'm using Chartjs to display a Line Chart and this works fine:
// get line chart canvas
var targetCanvas = document.getElementById('chartCanvas').getContext('2d');
// draw line chart
var chart = new ...
- 2,390
140
votes
14
answers
142k
views
Python equivalent of D3.js
Can anyone recommend a Python library that can do interactive graph visualization?
I specifically want something like d3.js but for python and ideally it would be 3D as well.
I have looked at:
...
- 4,621
136
votes
8
answers
373k
views
Rotating x axis labels in R for barplot
I am trying to get the x axis labels to be rotated 45 degrees on a barplot with no luck. This is the code I have below:
barplot(((data1[,1] - average)/average) * 100,
srt = 45,
...
- 2,934
133
votes
7
answers
40k
views
How do you represent a graph in Haskell?
It's easy enough to represent a tree or list in haskell using algebraic data types. But how would you go about typographically representing a graph? It seems that you need to have pointers. I'm ...
- 7,244
129
votes
18
answers
135k
views
Difference between Prim's and Dijkstra's algorithms?
What is the exact difference between Dijkstra's and Prim's algorithms? I know Prim's will give a MST but the tree generated by Dijkstra will also be a MST. Then what is the exact difference?
- 2,777
129
votes
8
answers
192k
views
Understanding Time complexity calculation for Dijkstra Algorithm
As per my understanding, I have calculated time complexity of Dijkstra Algorithm as big-O notation using adjacency list given below. It didn't come out as it was supposed to and that led me to ...
- 10.3k
128
votes
6
answers
145k
views
SSRS chart does not show all labels on Horizontal axis
My SSRS report does not show all the labels on the horizontal axis. Please see below.
Note how the red arrows point to the few that do show. So my question is, where are the rest of the labels? Each ...
- 2,761
127
votes
15
answers
154k
views
Limit labels number on Chart.js line chart
I want to display all of the points on my chart from the data I get, but I don't want to display all the labels for them, because then the chart is not very readable. I was looking for it in the docs, ...
- 3,858
127
votes
8
answers
64k
views
Is there a good charting library for iPhone? [closed]
I have a need to render and display charts (bar charts for now, but more types may be needed later) in an iPhone app I'm working on. I've done some looking around and it doesn't look like there are ...
- 12.1k
126
votes
5
answers
147k
views
Export a graph to .eps file with R
How do I export a graph to an .eps format file? I typically export my graphs to a .pdf file (using the 'pdf' function), and it works quite well. However, now I have to export to .eps files.
- 1,588
125
votes
13
answers
95k
views
Gantt charts with R
How do I create a Gantt chart in R?
I'm looking for something sophisticated (looking more or less like this):
P.S. I could live without the dependency arrows.
- 30.2k
115
votes
5
answers
145k
views
Android charting libraries [closed]
I am trying to find a fast and reliable charting library. After some searching, I found 4 libraries: AChartEngine [warning! official website is down and redirects to virus filled website!], ...
- 1,359
114
votes
5
answers
161k
views
How do you plot bar charts in gnuplot?
How do you plot bar charts in gnuplot with text labels?
- 38.1k
113
votes
11
answers
140k
views
Disable Animation with Charts.js
I'm having some trouble turning off the animation with charts.js.
This is my code:
var pieData = [
{
value: 30,
color:"#F38630"
},
{
value : 50,
...
- 1,155
113
votes
3
answers
156k
views
How to use two Y axes in Chart.js v2?
I am trying to create a line chart with two datasets, each with its own Y scale / axis (one to the left, one to the right of the graph) using Chart.js.
This is my code (jsfiddle):
var canvas = ...
- 2,215
111
votes
8
answers
155k
views
Breadth First Search time complexity analysis
The time complexity to go over each adjacent edge of a vertex is, say, O(N), where N is number of adjacent edges. So, for V numbers of vertices the time complexity becomes O(V*N) = O(E), where E is ...
- 10.3k
110
votes
2
answers
141k
views
Charts for Android [closed]
I am working on a project which have some charts (graphs), tick chart, candlestick chart and range chart. But the problem is, there is no library for that charts. I have got Google chart API for ...
- 1,974
105
votes
7
answers
83k
views
Three ways to store a graph in memory, advantages and disadvantages
There are three ways to store a graph in memory:
Nodes as objects and edges as pointers
A matrix containing all edge weights between numbered node x and node y
A list of edges between numbered nodes
...
- 39.8k
103
votes
1
answer
190k
views
Relationship between dpi and figure size
I have created a figure using matplotlib but I have realized the plot axis and the drawn line gets zoomed out.
Reading this earlier discussion thread, it explains how to set the figure size.
fig, ax =...
- 2,081