Histogram Definition and 59 Threads

I could really use some help here, I am a transfer student so my course load is all out of order. I have a statistics course that requires me to use Python to solve this one question (the 2 parts shown below). I never took any sort of coding before, I don't know where to even start. Can anyone...

Hello, I know that this question might be a bit silly but I am confused about plotting a normalized differential cross section. Suppose that I have a histogram with the x-axis representing some observable X and the y-axis the number of events per bin. I want the y-axis to show the normalized...

Hello everyone, I calculated the matrix element of a parton level process and determined the total cross section via a MC-simulation. Then I wanted to look at some differential distributions like the differential cross section with respect to the energy of one of the particles in the final...

I am wondering if this problem has a name, and what is the most efficient way to solve it. Say you have a normalized histogram ##h(P)## (representing a pdf estimated from a large population), with ##n## bins, you want to generate a sample of points ##S## from ##h(P)## of size ##k##, such that...

I made a histogram based off a dataset and I calculated the uncertainty of the measurements and I included the error bars into my histogram. Is that okay? I am asking because I never seen error bars included with a histogram. I have included an image of my histogram below:

I have written the following source code: using System; public class CommonDistributions { public static double Uniform(Random random) { return random.NextDouble(); } static double Gaussian(Random random) { return Math.Sqrt(-2 * Math.Log(Uniform(random))) *...

Hello. Please, take a look at the screenshot from the textbook. They say in the textbook that there are in total 48 data observations, 20 of which lie in the interval 0 - 2, and 6 lie in the interval 2 - 4. Yes, both 20 and 6 are more or less clear on the graph, but how did they come up with 48...

Hello everyone, I'm trying to make a MATLAB program which read a file.dat and then do a histogram This what I did Data2=importdata('Ma.DAT'); R1=Data2.data(:,17) R1(R1>-9.9) L = 0:0.1:8; histc(R1,L) bar(L,histc(R1,L),'histc') xlabel('R1') ylabel('counts') [FONT=PT Sans...

Homework Statement A new particle with the mass of 317 GeV and natural width which is much smaller than the mass resolution of the detector is under investigation. It decays into two photons with equal energies, which are detected in the electromagnetic calorimeter. If one searches the particle...

Homework Statement If one bar of a histogram has been generated with ##n## entries from a total of ##x## measurements, i.e. the event occurs randomly ##n## times in the ##x## event interval, then what is the standard deviation of values in this bar? Let ##k## be the range of values that could...

I would like to understand the 'weighted histogram analysis method' (wham), which is far to go, but before that am not sure what a weight is? {{Though I understand what is probability density function which has been already discussed on this forum here, and I assume applying weights is a...

I'm trying to replicate a machine learning experiment in a paper.The experiment used several signal generators and "trains" a system to recognize the output from each one. They way this is do is by sampling the output of each generator, and then building histograms from each trial. Later you...

Hello everybody, I have a problem with the logarithmic binning of some data (which are expected to be distributed as a power law). I found this https://www.physicsforums.com/threads/exponential-binning.691834/ What "mute" says is exactly what I need: equally spaced bins on a logscale to...

I am working on astrophysical data and I have a large number of redshift values of quasars. Now, each redshift estimate comes with its estimated standard error naturally. If I plot a histogram of these redshifts, I would expect the bins counts to also have some sort of uncertainty. I am unable...

I am using ROOT to calculate the Fourier transform of a digital signal. I can extract the individual parts of the transform, the magnitude and phase in the form of a 1D histogram. I am attempting to reconstruct the transforms from the phase and magnitude but cannot seem to figure it out. Any...

I am trying to clarify what someone means by the words : normalize, reweight. So I'll write what I think they do in practice: 1. Normalization: takes a histogram and scales it by a constant value. The shape of the histogram is not changing, but how the y-axis looks does. 2. Reweight : here I get...

Homework Statement [/B] 1. I've been tasked with forming a 10 x 10 matrix with elements 0, 1, 2, 3, 4, 5,... and have it display properly. 2. Then, take this matrix and make a 2d-histogram out of it. Homework Equations Here is my code void matrix6( const int n = 10) { float I[n][n]; //...

I have been studying a processing time for an industrial process. The present analysis just consists of finding the mean value as if the time was distributed normally. I took a sample of data and made a histogram of the data and realized it is not normally distributed at all. The normal...

Say I have a large data set of 1,000,000 points. If I plot a histogram of this data, I get a bar chart with bins along the x-axis and the number of items in each bin along the y-axis. If I take the number of items in each bin and divide this by the total number of items (1,000,000 in this...

Hi, I am having one histogram that contains 101 bins. I tried rebining it with the TH1::Rebin: histogram->Rebin(2.); But I got the warning message that 2 is not an exact divider of 101. I looked in ROOT TH1 Rebin's page, and read this note: I don't understand what the execution of the...

Homework Statement The task is to plot a 2-d surface of the potential and field lines calculated from a numerical method. In this case, there is a charged box (v = 1) @ r = 1 (it's not round, but each side is d = 2 and the center of the box is at the origin) and the edges of the box are v=0...

I have one dimensional binned data that has a peak to which I need to fit a distribution, such as Gaussian or Lorentzian, that is described with four parameters, height, width, centroid position and the background. The problem is that the counts per bin are low and the peak is only 5-6 bins wide...

Homework Statement Hi, I need to create a histogram in Latex. I know how to do this, however, I only know how to do it if I have a limited number of points so I want it so that I can get a computer program to generate a list of numbers and save them to a file and then I can import this to Latex...

Hi, I have a matrix 150x1 with values between 5.321 to 13.226 and I want to use the matrix and plot a dose-volume histogram (https://en.wikipedia.org/wiki/Dose-volume_histogram). Can someone help me.

Homework Statement (iv) Calculatethehistogramforthewaveheightandwaveperiod.(v) Compare the histogram with the Rayleigh distribution.(vi) Calculate exceedance probability distribution for the wave height and wave period using plotting position formulae and compare it with Rayleigh...

for the class 100-199, the f (number of household) is 20, but in the histogram, the frequency is divided by 2 which 20/2 = 10 , but how can it show that in the class 100-199 , the total frequency of 100-199 is 10 ? when i look at the histogram, i would directly think that there are f=10 in the...

Warning: requires the tikz and pgfplots packages. I've got my histogram almost where I want it: \begin{center} \begin{tikzpicture} \begin{axis}[ tiny, width=6in, ymin=0, ybar interval, ] \addplot+[hist={bins=10,density}] table[row sep=\\,y index=0] { data \\ 565 \\...

let's say I have 10 data points. And one of my data points is 270. Then let's say two of my bins are 260-270 and 270-280. Which bin would you put the 270 in? Or would such a choice of bin range be inappropriate and new ranges have to be chosen?

Dear Physics fans, Are we all okay? I hope so. I was wondering if you could help me please? I am banging my head against a wall in MATLAB and I think what I need to do should be very easy. I have a histogram of intensities and I could like to colour then starting off at black and...

Hey all I have what I assume to be a fairly vague question. I'm taking a programming class right now for MATLAB and the current project we are working on is a simple histogram display from reading an excel data file. The coding is extremely easy however, having never taken a statistics course...

Any python/matplotlib experts out there?? This one has been driving me crazy all day. I have three vectors, azimuth, frequency and power, which I would like to histogram and plot on a polar axis. I can plot a scatter plot this way no problem but the histogram gets messed up somehow. An example...

I'm wondering if there's an expression/correction for finding the entropy of a density using histograms of different bin sizes. I know that as the number of bins increases, entropy will also increase (given a sufficient number of data points), but is there an expression relating the two? All I...

Hello, I have a histogram, where I count the number of occurrences that a function takes particular values in the range 0.8 and 2.2. I would like to get the cumulative distribution function for the set of values. Is it correct to just count the total number of occurrences until each...

Hey everyone, I'm not sure if there is an effective answer to my problem, but here goes: I am working on Ramachandran plots for short peptides (3 amino acids long). For every snapshot of the protein (this would be my data point) there are two angles being recorded, the phi and psi angles...

Hi I have a histogram of some numbers following a PDF, such as Histogram[RandomReal[1, 100]] What I want is to extract the information contained in this histogram in a list, i.e. get a list of the bin value (e.g. the average value it represents) and the number of entries in it. Is using...

Is it possible to draw histograms in Microsoft Excel? I see all charts of icons in the Excel tool bar but no histogram.

Hi All Would be most grateful if there are some pointers given on this question. Ques: There is a range of different brands of museli bars with information of nutritional values. E.g Museli bars A with variables of Vitamin, Fat, Potassium values and so on. I have been asked to plot a...

Suppose I have a regular histogram, I can normalize it by dividing the frequency counts by the total number of counts (at least I believe that's all you need to do). What you're left with should be an approximation to the underlying PDF (probability density function). What I'm asking is how...

I have all the information I need, but I just need a bit of help on getting my data on a normalized histogram in excel. First, if I'm not mistaking, a normalized histogram is just a normal histogram where it is roughly symmetrical about the curves centerline, is that correct? I have a list...

I have two histograms that I would like to compare quantitatively. The values of the first histogram have respective relative errors for each bin. The second histogram has no statistical uncertainty. I could compute probabilities for each bin that the exact values would fall into a given...

Im analyzing some data from a previous student I am trying to plot a line of best fit over the histogram and hense find the value of the coefficiants the files had to be loaded as -ascii so this is the code i have typed so far x=load('filename.mat','-ascii'); mean(x); hist(x,300) this then...

Homework Statement 4: (T/F) The expected value of a distribution always occurs at the center of the tallest bar on the histogram. Homework Equations (no equation necessary for it is T/F) The Attempt at a Solution I believe this is false for the expected value can be definite or...

[b]1. The problem statement If i generate a list of 300 random numbers in excel, each number between 1-50 for example, and i plot the frequency that each number comes in a histogram, how can i tell, looking at the histogram, if the numbers are really random? is there a certain distribution...

I am making a histogram for some experimental data in OpenOffice Calc (Excel equivalent). However, when I have it count frequency for a certain number, it displays odd behaviour. For example: Data: 1 499500 1000 375250 1000 Bins: 0 50000 100000 150000 200000 The problem is...

I am trying to help my brother on his Stats homework, but for the life of me, I can't rememeber how to make a histogram. He has the answers to compare to, but is unsure how they got to them, as am I. It's been so long since I have done this stuff, I need a little refresher. Google is not helping...

Hello again. Sorry for all the posts. I have a histogram of frequencies in Mathematica and the intervals on the x-axis are predefined and kind of unrepresentative. I changed the bin number (with 'Histogram[mydata, binnumber]') but I can't seem to find anything on the internet about changing...

I have some things that have a 7% chance of being blue, 10 of these things are put in a box. What is the percent chance that the box will have exactly one blue thing? Two blue things? and so on.. I have simulated this and came up with the following (all appx) 0 - 37% 1 - 37% 2 - 18% 3 -...

Hi guys, On my homework, I'm simulating a normal distribution on Mathematica by adding up a bunch of RandomReal[] , that is, uniform(0,1) random variables, and using the central limit theorem. I would like to plot both the histogram and the actual Gaussian probability density function on the...

Homework Statement Its about random radioactive decay. I have a histogram showing the number of counts recorded in 3 second intervals and I've drawn the Poisson Curve on the same graph. I have a graph for 50 intervals and one for 100 intervals and I need to analyse how well the data...

Hey people, I am trying to write my own histogram making code since the Excel one sucks IMO. I am having some trouble thinking the whole bin 'width' thing through though. I plan on using the formula number of bins = k = 1.87(N - 1)0.40 + 1 Then I was going to figure out the bin...