Data Definition and 998 Threads

[Moderator's Note: Thread spun off from previous thread in General Discussion since it is more specifically about particular scientific theories and how to test them against data.] So in your opinion, everything in the list below is quantitative, not qualitative...

Summary:: I have recently started with data structures in java and I tried doing this Program .But I have few confusions. 1.How do I write the main() of the program? 2.What are we supposed to do with the value returned by function pop()? If anyone could point out if there are any errors and...

My tablet is IKALL N9 .Recently,I started facing problem connecting it to the charger so I would adjust the charger a bit until it would show charging .But a few days back it stopped charging altogether.it won't show the charging sign neither with AC source nor the power bank.I even changed the...

In 1982 I was given a ZX Spectrum by a Timex employee. It was one of only three English units that had been converted to NTSC from PAL. They worked for Timex but had their own company on the side to write software for the Timex computer and for the spectrum They hired me to do the title screen...

So I have attempted to plot the scatter diagram. My first query is does the question intend for you to include both subsets of data on one axis, (which I have plotted on the x-axis) or rather does it demand two separate diagrams to investigate if there is any correlation, or a single diagram? I...

My initial guess was to calculate the upper and lower value, and then average those two values, but I don't know whether this is correct to make the uncertainty interval symmetric. After I calculated the average value, I subtracted it form the upper and lower value, and obtained the symmetric...

� Source Deaths Data timestamp https://www]cdc.gov/coronavirus/2019-ncov/cases-updates/cases-in-us.html 175,651 Aug 23 2020 12:15PM EDT https://www]worldometers.info/coronavirus/#countries 180,724 August 24, 2020, 16:47 GMT Johns Hopkins U ARCGIS* 176,901 8/24/2020, 10:27:56 AM...

I'm having a bit of trouble getting a clear picture of what is going on here, so if anyone can shed any light, it will be greatly appreciated. 1. I can see how the metric coefficients provide the six numbers per spacepoint, but it can't always be possible to transform the metric into a diagonal...

Hi all, Trying to right a program in Python asking user to guess a number ( integer in finite range) until they make a correct guess, though I want to warn user when guess is too high --asking that they choose a lower number ,and same for when the guess is low, asking them to choose a higher...

Calculate the boiling temperature of methanol at 60 atm knowing that Tc = 513K, Pc = 78 atm and the acentricity is 0.555. I would like you to help me start the exercise. I thought about using the Pitzer Correlation to be able to calculate the fugacity coefficient, but I don't have the...

I am collecting data from a Geiger-Muller radiation detector, which generates clicks that correspond to particles entering the detector. These clicks come in purely at random, so the number of clicks in a given time interval are governed by the Poisson distribution. My job is to find the average...

I'm designing a course for 9th grade students that focuses on experimental methods in science. One topic that will come at the beginning of the course will be how to display experimental data graphically, including estimates of experimental error. I'm looking for some advice about what...

What would be better to choose as a career COMPUTATIONAL PHYSICS or DATA SCIENCE Is there any pro and con?

Hi All, A couple of questions, please: 1) Say df is a dataframe in Python Pandas, and I select a specific column from df: Y=df[column].values. What kind of data structure is Y? 2) I want to find the sum of two numbers: Def Sum(a=0,b=0): return a+b If I want to find a sum over sum data...

number of moles of CO2 =0.089moles (using 2/22.4) number of moles of water = 0.067 (using 1.205/18) I know that all the carbon from the hydrocarbon is in the CO2 and all the hydrogen from the hydrocarbon is in the water and water creates x2 hydrogens so number of moles of C : H = 0.089 ...

I ask this with more of a software background than an engineering background, but here I go anyway. Big data is arguably the cultural motif or monograph of the information age. Trends involve immersing ourselves in media of various sorts and processing them at exceptional rates. Of course...

Here is my work so far: 52-13=39 There are 39 decks of cards left since the spades were removed. a) Then there 13 hearts therefore, (13/39 ) * (13/39 ) that would be two hearts but I am not sure what to do next. But I am sure that it would be 39 cards and 13 hearts on top (maybe) cus it is...

Hello! I need to make a straight line fit to 8 points, with errors on them. The data is like this ##x = [1,2,3,4,5,6,7,8]##, ##y=[377.488 691.191 , 1030.319, 1428.801, 1753.884, 2113.065 , 2398.642, 2797.664]##, ##y_{err}=[97.145, 131.452, 160.492, 188.997, 209.397, 229.840, 244.879...

Hi I have saved data in pdf format, and I wish to generate a plot from this data. The data is iterations of optimising some function. I can't just copy and paste it into the live window obviously and then try to generate a figure, so how can I generate a figure, just as I would have done...

Hi, Hoping to back up my phone data. I used to use this free app SMS, which connected to gmail and uploaded the data there . Only now google/gmail has changed or tightened access rules and I get an error message when my phone tries to relay data to my gmail account. I have gone through...

Hi guys, I hope everyone is safe and well. I'm currently nearing the end of my third year dissertation, and I'm looking at analysing pitching moment coefficient (CM) data over a full range of angles of attack for airfoils with different serrations on the trailing edge. What are things to look...

So, a website in which I just enter an element or an Isotope and it just lists all the relevant experimental data like mass, mass-defect binding energy etc. Also resources for the absorption data, resources to explore Monte-Carlo simulations, and other calculation tools would be awesome. Just a...

Continue reading...

I make a theoretical calculation and then compare the calculation result and the median of the corresonding measured dateset. The difference between them is very slight, so I state that the theoretical model is right and good. However one expert has suspended whether the median is typical...

I have 100 data. if I want to use data from 10 to 100 or from 20 to 100, which statistic should I use to test whether I can use data from 1 to 100 or 20 to 100 without significance?

I'm a physics student in undergrad. For a project in our class in which we propose an experiment (which we will not actually perform and we can use resources we don't have access too for the "experiment") and base it on existing research for that topic. I am searching on ads and arxiv, so far I...

Hi PF! I'm a new Linux user (please be patient :) ). I would like to read data stored as a .dat file from a different directory so I can reference it; do you know how? Specifically, I want to replace a line from different C files (controlDict and U), located here ./system/controlDict and here...

Hello! I have some counts measured at fixed points, both for background only and signal+background. Say that for a given x I have 16 counts with background only and 100 for background+signal. So the background is ##16\pm 4## and for the signal+background ##100\pm 10## (assuming poisson...

I have written a C++ code in Visual Studio 2019 that requires an input tab-delimited text file and outputs a text file that is also tab-delimited. The data within the text file are stored in a vector and then it will perform calculations, whose results will then be written in a text file as...

Hello! I have some data points obtained from a measurement and one of them is defined as the reference point. I need to compute the difference between that reference point and all the others (including itself) and plot the difference as a function of another variable (which doesn't have an error...

I don't understand how to use output from an NPT molecular dynamics simulation to compute a thermodynamic derivative. I need to compute this (where "d" is a partial derivative, "T" is a subscript that means, "at constant temperature," and "E" is internal energy): -(dE/dV)T I have a simulation...

What does this new find signify, i think we may be shortly due for something bad about to happen https://www.universetoday.com/144900/neutrinos-have-been-detected-with-such-high-energy-that-the-standard-model-cant-explain-them/https://arxiv.org/abs/2001.01737...

My boy gave me his MicroSD (Kingston 16Gb Class 4) phone chip to see if I can recover the data. His phone apparently told him it was corrupt. He tried it in a new phone and apparently it "sort of" worked. Until an update came along. I'm not sure if this is two distinct issues (the corruption...

I would like to know the equation of Fourier transform when the data has lack. like this sine wave.

Hello. My current understanding (please correct, if wrong) is that the expansion of the universe is observed to be accelerating, rather than coasting or slowing down. The tentative cause of this acceleration has been given the placeholder name of 'Dark Energy'. One line of evidence for this...

Let a set of values at several discrete points in 2D or 3D space be given. These values will be processed by an algorithm. At the end, processed values need not be known at the original locations but at grid points. Therefore, spatial interpolation needs to be applied. Is there a general...

An interesting article from the Physics Archive Blog:

Can I use a brand new removed SSD HardDisk to store data without doing any thing at the beginning time(e.g without formating or other things)?I will use SSD to store ebooks(PDF,Djvu,epub,Audio files). Can I open books when I attach the removed SSD to laptop?

Hi I have collected data from a IMU on a boat. Currently I am using the angular velocity measurement vector ##\omega^b_{imu} = \begin{pmatrix} p\\q\\r\end{pmatrix} ## for use in kalman filter, where superscript ##b## is BODY frame. The BODY frame is given be x-axis pointing forward, y-axis...

Hi! I have some measurements of the rate of a physical process versus energy. For each energy I have a number of counts and a measurement time associated to it. However, the step (in energy) at which the measurements are made is very small and also the measurement time is small, hence just...

Hello! I need to do some analysis for a project with the SXS gravitational wave data: https://data.black-holes.org/waveforms/catalog.html but I am a bit confused about the initial conditions of their simulations. I read the paper they published about the data (it can be found at that website)...

The specific example I'm going to give is from a discussion I am having elsewhere, but the question itself, as given in the thread title and summary, is a general one. We have two couples, each of which has seven children that, in order, are six boys and one girl (i.e., the girl is the youngest...

Dear users, The situation I have encountered is a simple statistical comparison of the experimental data, which accepted as correct, with the results obtained via six theoretical models. In the experimental data, there exist y values corresponding to x values and also the measurement errors of...

Hi, trying to scrape a page : https://www.hofstede-insights.com/wp-json/v1/country I get the list of columns I want, but not the data assigned to the columns in the page that is being scraped. from bs4 import BeautifulSoup import pandas as pd import requests url =...

Hello. I would like to automate the process of getting result data from Simpack Post. It is easy to extract data from Simpack Post diagrams to txt-files and import to excel. But is there a way to extract data by choosing Simpack result chanels or generally of chanels? For example, when I define...

In a game heroes have a maximum dodge rate, from experimental data we have 13 dodges out of 24 attacks (so 11 hits). A fellow on my discord server had immediately solved for the dodge rate as being 13/24. I started to explain it is not so simple as dividing (24-11)/24=13/24 is not the dodge...

Hello! I have 5 data points with errors associated to them ##y_i \pm dy_i## and the corresponding ##x_i## values (which don't have uncertainties associated to them). I need to calculate the difference between the first of these points, ##y_1## and the rest, and fit a straight line to it...

I was curious about how much we could advance planetary science with the amount we are spending (and planning to spend) on the SLS. Specifically, I want us to increase the number of climates we study from basically Earth to every planet in the solar system. It looks like polar orbiting...

Hello! I have the to fit a curve to the attached data (I plotted it both with and without error bars), where the error bars are Poisson errors i.e. ##\sqrt{N}##, where ##N## is the number of counts in the given bin. I want to fit 3 Gaussians + background and extract the values (and errors...

Hello! I am working on a spectroscopy project in which we adjust the wavelength of a laser and get some counts on the detector from some laser-atom interactions. The data that we have is in the form: ##(\lambda##, ##dt##, ##dN)##, where ##dt## is a time interval, ##\lambda## is the laser...