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Questions tagged [histogram]

In statistics, a histogram is a graphical representation, showing a visual impression of the distribution of data.

In statistics, a histogram is a graphical representation, showing a visual impression of the distribution of data. It is an estimate of the probability distribution of a continuous variable and was first introduced by Karl Pearson. A histogram consists of tabular frequencies, shown as adjacent rectangles, erected over discrete intervals (bins), with an area equal to the of the observations in the interval. The height of a rectangle is also equal to the frequency density of the interval, i.e., the frequency divided by the width of the interval. The total area of the histogram is equal to the number of data. A histogram may also be normalized displaying relative frequencies. It then shows the proportion of cases that fall into each of several categories, with the total area equaling 1. The categories are usually specified as consecutive, non-overlapping intervals of a variable. The categories (intervals) must be adjacent, and often are chosen to be of the same size.

Histograms are used to plot density of data, and often for density estimation: estimating the probability density function of the underlying variable. The total area of a histogram used for probability density is always normalized to 1. If the length of the intervals on the x-axis are all 1, then a histogram is identical to a relative frequency plot.

In scientific software for statistical computing and graphics, The function hist generates a histogram. It can also optionally scale it so that its total area is 1. This puts it in the right scale if one want to overlay a probability density curve.

More about it here : histogram wiki

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Stacked histogram with time series data with gnuplot?

I have a lot of data like this callr | method | call_count | day ------+-------------------------+------------ foo | find_paths | 10 | 2016-10-10 bar | find_paths | 100 | 2016-10-10 foo | find_all | 123 …
slashdottir
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Using ggplot geom_histogram() with y-log-scale with zero bins

I've got a set with >10000 integers attaining values between 1 and 500. I want to plot the values in form of a histogram, however, since only a few integers attain values greater than 200, I want to use a logarithmic scale for the y-axis. A…
Scholar
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Set different number of intervals in hist with relative frequency

I want to set 5 and 7 intervals for my histogram... My info abc <- c(38,40,30,35,39,40,48,36,31,36,47,35,34,43,41,36,41,43,48,40,32,34, 41,30,46,35,40,30,46,37,55,39,33,32,32,45,42,41,36,50,42,50,37,39, 33,45,38,46,36,31) h =…
Colonel G
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Conditioning histogram with Gnuplot

I would like to make a histogram using a if statement. I.e.: u ($5 < 356 ? $9:1/0) . Plotting column $9 when, for instance, column $5 is lower then some number. The simple script found online (also in some stackoverflow questions): n=100 #number of…
Panichi Pattumeros PapaCastoro
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Difference (or quotient) between two 2D (not 1D) histograms (not KDEs) plotted using R and ggplot2?

Similar questions have been asked in the past, but I haven't been satisfied with any of the answers and none matches what I require. I believe the problem has been that the questions have been ambiguously posed. I'll try to do better. Imagine that…
Dr. Andrew John Lowe
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Create a histogram filled using another variable in ggplot

I am working with a dataset that includes the age of some people. I am trying to create a histogram for the ages of the people with ggplot in which the colours of the bars of the histogram should depend on some predefined age intervals. So for…
Álvaro Méndez Civieta
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How to automatically normalize multiple histograms to get to the same maximum level?

I have multiple histograms generated from various samples that need to be combined in the end. What I have found is that I am not getting good results at the combination stage because different plots have different max values, but if I normalize…
StuckInPhDNoMore
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how to use a log scale for y-axis of histogram in R?

I have a large dataset with the lifespan of threads on an discussion board. I want a histogram that shows the distribution of lifespan, so I did this: dall <- read.csv("lifespan.csv") colnames(dall) <- c("thread.id", "seconds.alive",…
amh
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Gnuplot, skipping timedat tics, histogram

So, i need to make histogram of data by dates, but i have problem with xticlabel overlapping, so, i'm trying to find a solution how to skip xtics to avoid overlapping. Considering that dates are not integer tics, i was trying to solve it that…
genesi5
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Very simple - Histogram in R

I am struggling to understand how I can get the following data into a histogram: NSP <- c(1380, 6003, 1827, 661, 331, 156, 97, 73, 58) hist(NSP) Each number should represent one bar in the exactly same order. I tried to use ggplot but failed to…
user7273912
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Creating bins dynamically in Tableu

I've got 50+ measures and I want to create histogram with binned data and switching displayed measures dynamically. I know how create bins manually but is there any possibility to create bins dynamically?
abcd
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Comparing histograms for jpeg image analysis using raster stack

I have thousands of webcam images in jpeg format which I want to analyze for cloud cover. Images with no cloud will be a mountain and will be relatively dark while if there is cloud the histogram is skewed to bright levels. The aim is to classify…
nicfit
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How to display a single Histogram bar with a different color

I've created a Histogram with JfreeChart that looks like this I want to highlight a bar based on if a specific value is contained in the bin the bar represents. For example if the red bar below represents the number of values between 100-110…
Norbert
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Colored histogram with ggplot2

I have a data frame with values and their associated weights. I want to make a histogram, such that each bar's height corresponds to the number of values in that bin and the bar's color corresponds to their total weight. How do I do that? Example: D…
Don Reba
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GNUplot: how to plot rowstacked bar chart using color codes in data?

I have the following sample data: col1 2 0 1 1 col2 1 1 0 0 col3 1 1 1 0 col4 1 1 2 1 col5 1 1 1 1 col6 2 0 1 1 col7 1 1 2 2 col8 1 1 2 1 columns #4 and #5 are the color codes for columns #2 and #3. For example, I want '1' for green, 2 for white,…
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