Tag for questions about building histograms in Mathematica. Apart from generating the graphics, and prettifying them, this also includes methods to extract their data.
18
votes
3answers
556 views
How can I make a heatmap of a days in year?
I know Mathematica has a ListPlot for time series but does it have a function for visualizing a list of dates as a heat map like this:
This idea is from D3, check it out here.
14
votes
3answers
411 views
How can I tell mathematica to generate an histogram from nominal data?
If I write:
Histogram[{1, 1, 1, 2, 2, 2}]
I get a nice histogram chart
but if I write
...
14
votes
2answers
415 views
How can I create facetted histograms?
I love Mathematica, and I would love to be able to use it for all of my data analysis tasks, but there is one type of analysis which I find almost trivial in R, and I have no idea how to approach in ...
13
votes
4answers
818 views
Problems specifying number of bins in Histogram
So I wanted to create a Histogram with a custom number of bins. Luckily there is a simple function for this in the form of Histogram[data, n] where n specifies the ...
12
votes
6answers
619 views
How to find major color in a picture?
I want to find the major color (the color which appears most often) in a picture and do some analysis later.
For example, if I have this picture:
What I want to do is find out that gray, red, ...
11
votes
4answers
207 views
Background Shading in Histogram3D
I am preparing some data for dissemination. I have a series of plots that look like so, using ListLinePlot:
The background shading is just being added using ...
11
votes
2answers
409 views
Trying to fit an unknown extreme distribution
First up, I'm quite new to Mathematica so any hints on better code would be greatly appreciated.
I have some histogram frequency data from an unknown distribution that I'm trying to fit. Here's the ...
10
votes
1answer
553 views
Make a density list plot/histogram from large, pre-binned data set?
I have a large data set consisting of $\mathcal{O}(10^9)$ two-dimensional points. In order to save memory and time I have pre-binned these into a uniform grid of $500 \times 500$ bins using Fortran. ...
8
votes
2answers
402 views
ColorFunction in Histogram[]
Let's say I have a Histogram:
Histogram[RandomVariate[NormalDistribution[10, 2], 500]]
and I want the bars positioned to ...
8
votes
1answer
417 views
Rapidly binning 3D data
I have a set of data (about 20 million datapoints for my real data) of the form {x, y, z, m}. There are 3 spatial coordinates x, ...
7
votes
1answer
225 views
Mathematica: Retrieving PlotRange from Histogram
I know that one can retrieve PlotRange of a plot by using
AbsoluteOptions[plot,PlotRange]
but that won't work on Histogram. Here an example:
...
5
votes
3answers
248 views
Smooth/histogram a 2D set
I have a 2D dataset like this one: {{x1,y1}, {x2,y2},...}
I need to smooth/histogram the data in such a way that binning is over the x-coordinate, while ...
5
votes
2answers
154 views
Histogram3D using sums instead of counts
I'm trying to create a 3d histogram/ matrix plot pair. My data is in the form
{{TTR1,TBF1},{TTR2,TBF2},....}
What I would like is to modify the Histogram3D so ...
5
votes
3answers
93 views
AxesLabel in Histogram3D unreadable
I'd like to modify this chart to relocate the z axis label so it's not over printing the values.
...
5
votes
3answers
145 views
How to preserve clipping when exporting a framed histogram with font embedding?
I work with histograms and would like to export it to EPS format. I've noticed that my exported image loses the PlotRangeClipping option that I set up when I export the plot. This is true for at least ...
4
votes
2answers
1k views
Calculate mean and standard deviation from ImageHistogram
I am doing my PhD in Clinical Neuropsychology; I had someone helping me analyse images (.jpg pictures) in Mathematica, but it turns out this person made some really bad decisions, and well, now I have ...
4
votes
2answers
324 views
Is there a way to output histogram x and y data without using the Histogram chart function?
I have a large list of data (3.2 million real numbers), and I would like to plot a histogram of it. The built-in Histogram function is very nice, but on my ...
4
votes
1answer
120 views
Representative Smooth Kernel Distribution from Truncated Distribution
I am trying to produce a better distribution from a dataset that is bounded to be greater than 0. Here is an example distribution from the documentation that mimics the behavior of the actual dataset:
...
4
votes
1answer
112 views
Rescuing a vertically clipped histogram
I recently ran a rather time intensive calculation and plotted the results in a histogram by simply called Histogram[data]. However, because of a rather serious error on my part, I recently lost my ...
3
votes
2answers
276 views
How to rebuild original data from a histogram?
I have data in form
list of values ex. {5,7,4}
list of frequecies ex. {1,2,3}
I would like to obtain the original data from which such a histogram was generated
ex. {5,7,7,4,4,4}
3
votes
3answers
319 views
Comparing 2 Data Sets in a Single Plot
I have 2 data sets, data1 and data2 with large (in the thousands) amounts of data
and I want to compare them
in a plane. They ...
3
votes
2answers
302 views
Add two Histograms to calculate summed Mean and StandardDeviation
As a follow up to this question: Calculate mean and standard deviation from ImageHistogram
I would like to add two histograms before calculating the mean and StDev. I would like to sum the numbers, ...
3
votes
1answer
92 views
How do I display a histogram with normalized counts?
I have some data corresponding to real number distances: {200.04053, 200.232123, 156.3242,...}, and I would like to bin these values and display them as a histogram ...
3
votes
1answer
135 views
How can I have an axis label automatically positioned below the X-axis?
I'm attempting to generate some histograms, and I'd like to automatically label the X-axis. However, Histogram[. . ., AxesLabel -> {"X", "Y"}] places the "X" ...
3
votes
0answers
75 views
AbsoluteOptions of a Histogram with PlotRange [duplicate]
Possible Duplicate:
Mathematica: Retrieving PlotRange from Histogram
I would like to evaluate the AbsoluteOptions of one of my ...
2
votes
1answer
112 views
How do I create a histogram out of this datastructure: x[i] = value_i?
Here is my SSCCE:
a[1] = 2; a[2] = 3; a[3] = 6; Histogram[a]
This throws and error though. Here are my questions:
What kind of data type is a? Is it an ...
2
votes
2answers
191 views
How do I generate a 3d histogram of runs
This question is an extension of the question I asked here Histogram of runs.
What I would like to do now is generate a Histogram3D that has the run duration on the x axis and the mean level on the ...
2
votes
1answer
146 views
2
votes
1answer
146 views
Misaligned DensityHistogram, DistributionAxes & PlotRange
data = RandomReal[NormalDistribution[0.5, 0.1], {10000, 2}];
DensityHistogram[data, PlotRange -> 1, Method -> {"DistributionAxes" -> "Histogram"}]
The ...
2
votes
1answer
57 views
How to extract the bin width from a Histogram made with an automatic binning method?
I am using the Scott binning method with Histogram and Histogram3D to plot some data. How could I find out the bin width chosen ...
2
votes
1answer
94 views
Using bin values and metadata in ChartElementFunction in histograms
The DensityHistogram command lets you specify a ChartElementFunction which according to the documentation:
The arguments ...
2
votes
0answers
141 views
Problem displaying eps exported histograms in Word 2010
I am having problems displaying histograms exported as .eps in word 2010. I don't have problems though displaying them in a specialized .eps viewer. (Postsript viewer from Rampant logic) I am writing ...
1
vote
1answer
59 views
Weird vertical line when trying to plot a histogram [duplicate]
I'm trying to plot a histogram of a few data points and overlay a plot on it (it's a fit of a geometric distribution to my data). The weird thing is that a vertical line appears always next to the ...
1
vote
2answers
135 views
Probability density histogram with unequal bin widths
I am confused by output of Histogram and HistogramList for probability density ("PDF") when ...
1
vote
0answers
59 views
Distribution above pointplot
This is my first question here, so I'm sorry if I do something wrong.
Also I'm fairly new to Mathematica (using 8). I've used it about 2 months. Only 2 weeks intensive. The rest was about ...
1
vote
0answers
143 views
Problems with log-log histograms
I'm using a custom function to create Log-Log Histograms of my data. It uses the CustomTicks` package (in LevelScheme, http://scidraw.nd.edu/levelscheme/) to display Log Ticks.
...
0
votes
1answer
71 views
How to obtain an approximate function for SmoothHistogram3D?
I have a random distribution of points in the $x\!-\!y$ plane. I can obtain a graphical representation of the probability distribution function using ...
0
votes
2answers
171 views
Creating histogram?
How can i create histogram of these variables that would show the depth of sensors when temperature is 0 Degree Celsius. Time function is 0 min, 50 min, 100 min, 150 min, 200 min, and 250 min and ...
