Talk:Histogram
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[edit] Missing: calculating bin sizes
Should this article contain something about calculating bin sizes?
If by bin size you mean width, then absolutely something needs to be here. There's no explanation of why the widths differ and in research elsewhere the widths are always equal, making the wikipedia definition inconsistent with what's available elsewhere. - Sam N.
- Bin widths do not have to be equal. In many instances they are equal simply because it is easier to handle, and any benefits from variable bin sizes are out-weighed by the simplicity of having equal bin sizes. An example of variable bin sizes is the histogram method of white balancing digital images, where the bin widths of the histograms of brightness are adjusted so that each bin has a roughly equal number of elements. Mattopia 19:46, 29 March 2006 (UTC)
[edit] Excessive whitespace
This article needs to be reformatted to eliminate the excessive whitespace. If the tables could be placed beside the graphs then that would tighten things up considerably.--Hooperbloob 05:16, 12 August 2005 (UTC)
I reworked the layout quite a bit, mostly merging the tables and reducing the graphs to thumbnails. It's not quite pretty yet, but methinks it should be a little easier to work with. --Pathoschild 01:29, September 21, 2005 (EST)
Added logical headings and reorganised appropriately. --Pathoschild 01:16, September 22, 2005 (EST)
[edit] Missing: intepretation of histogram shapes
Should the article contain something about the interpretation of various histogram shapes; normally distributed around a mean, etc.
[edit] Missing: etymology of the word histogram
The article should contain something about the etymology of the word "histogram".
- I've added a little something about the etymologyAastrup 09:46, 12 February 2007 (UTC).
[edit] Missing: Basic example of a histogram
This article should contain a simple histogram to illustrate what it is. Currently it is a tad ambiguous with the 2000 census versions.
[edit] Confusion
"Actually, this document shows bar graphs, but they are not histograms since the bars are not adjacent."
more concrete and correct examples of histograms are required
[edit] Histogram
Hi, what is the name given to the highest point in a histogram, and what is the name of the bars that are not the highest?
++ Density plots == This page needs links to density estimation, which are often superior to histograms, see, e.g. Simonoff Smoothing methods in statistics.
Density plots are not superior to histograms - they are different. Histograms are generally more appropriate for exploratory data analysis as they make fewer assumptions about the underlying distribution, and they let you see the raw data more directly.
--Hi, how do you know when to use a histogram and a bar graph? What is the difference between the bar graph and the histogram in simple terms??
[edit] Excel
As I have understood form this page there is a difference between a bar chart and a histogram, micorsoft excel 2003 calles a bar chart a histogram and a horizontal bar chart a bar chart... Mabe a warning that Excel get the names messed up might be in order? Thanks --Squidonius 22:58, 28 January 2007 (UTC)
[edit] Bin and Count independence?
A colleague had a chart displaying the number of events occuring during each hour of the day, displaying 24 bins, one for each hour of the day. He called it a Histogram and referenced the definition in this entry. What bothers me is that the definition of the count does not seem sufficiently independent of the definition of the bins. Is there some aspect of a histogram that would require the definition of the count to be independent of the definition of the bins?
