Tagged Questions

7
votes
3answers
304 views

Is it appropriate to plot the mean in a histogram?

I have a Really Stupid Question: Is it "okay" to add a vertical line to a histogram to visualize the mean value? It seems okay to me, but I've never seen this in textbooks and the likes, so I'm ...
5
votes
2answers
257 views

QQ plot does not match histogram

I have a histogram, kernel density and a fitted normal distribution of financial log returns, which are transformed into losses (signs are changed), and a normal QQ plot of these data: The QQ plot ...
5
votes
2answers
132 views

Histogram of uncertain data

I have a set of values, each of these values has its own mean and variance. I want to be able to account for this variance when I plot the histogram of the means. Something like an error bar on the ...
1
vote
0answers
47 views

Plotting a histogram estimate together with an analytical solution of the mean and covariance parameters

How do I plot a histogram estimate of this marginal distribution p(x1): ...
0
votes
2answers
404 views

Graphical representation of weekly spending

What is the correct graphical representation for these data of weekly spending (in dollars) on soft drinks for 20 people: ...
1
vote
0answers
31 views

References regarding rules for multidimensional histograms

Can someone give me references on the theory of histograms applied to multivariate data? Are there any rules like the one dimensional Freedman-Diaconis available for the high dimensional case? What ...
4
votes
0answers
218 views

Calculating and comparing histograms of complex numbers

If I have a 1D sequence of complex numbers with real and imaginary parts, how can I compute the histogram of this sequence? Do I separately compute the histogram of both the real and imaginary parts? ...
1
vote
1answer
176 views

How to create a histogram smart

I need to make a histogram of employees in firms across the country. My goal is to examine the extreme observations and there is of course a lot in the beginning and very few in the end so I can't ...
0
votes
1answer
310 views

How to plot frequencies vs. values in SAS (power-law style graph)?

I have a set of counts as a response variable (anywhere from 0 to 85). I want to find the easiest way to plot count on the y-axis vs frequency of that count on the x-axis, the type of plot you see in ...
2
votes
2answers
521 views

Histogram/distribution fitting for this dataset with unequal and open-ended intervals?

I have this income distribution data for various groups: https://docs.google.com/spreadsheet/ccc?key=0Akwg3n_e05cCdEdtT0VZYU5keW5DVkNoNmpBWmdzeUE As you can see, I have intervals/bins with varying ...
2
votes
2answers
1k views

Odd problem with a histogram in R with a relative frequency axis

Using either truehist() from MASS or just the normal hist() function in R with the prob=TRUE option, I'm getting very strange values for the y-axis. I was under the impression that these values should ...
2
votes
2answers
96 views

How to create a density plot for data from multiple years with each year represented by a different colour?

I have data on a variable spanning multiple years. I want to see how the distribution has evolved over the years. Is there an easy way to produce a density plot for each year in single plot with ...
11
votes
3answers
985 views

Best way to put two histograms on same scale?

Let's say I have two distributions I want to compare in detail, i.e. in a way that makes shape, scale and shift easily visible. One good way to do this is to plot a histogram for each distribution, ...
0
votes
1answer
502 views

Altering a gnuplot histogram [closed]

What are the available options for the boxes in a gnuplot histogram, for example, can one obtain a "filled solid box" or a fitted curve that touches the "top" of the box?
7
votes
2answers
890 views

Visualizing multiple “histograms”

I am having difficulties to select the right way to visualize data. Let's say we have bookstores that sells books, and every book has at least one category. For a bookstore, if we count all the ...