Data Definition and 998 Threads

Hello! :smile: So I have some basic programming skills, but I have never done anything that interacts with the web. Here at work, we have a website that we have to go to in order to check the statuses of all of the jobs we have open. The website is awful in that you cannot run a report on...

William Binney resigned from the NSA because they were collecting all the data they could on US citizens and storing it permanently. https://www.youtube.com/watch?v=TuET0kpHoyM He did not trust them to use it responsibly and he went public. According to Glenn Greenwald, the NSA has refused...

Hello. I have an undergraduate degree in CS and I'm beginning grad school to study AI and Machine Learning. I've spent a lot of time doing "software engineering" (dealing with design patterns, web development, QA, Agile processes, SQL, GUI development) and I'm really sick of it. I don't use...

As I understand, electrons cannot be on the exact same level as another one in the universe. If we could move one electron in one placed and somehow monitor another ones reaction - would it be possible to instantly transmit data anywhere in the universe?

Homework Statement I am trying to see if two sets of data represent the same values or not. I have: Mean1 = 9.3155, stdev1 = 0.1334; mean2 = 9.3040, stdev2 = 0.1248; N1 = N2 = 1000; I got these values from my data using MATLAB (std() and mean()); Homework Equations z =...

Say I have a model, y = f(x), and ten discrete data points to compare to this model, (x1, y1)...(x10,y10). The normal way would then be to take the residuals and square them to get a quality of fit, ie. average residuals squared = {[f(x1) - y1]^2 + ... + [f(x10) - y10]^2}/10 I also remember...

My doubt is that whether we can apply non-linear smoothing to a almost linear data ( without one or 2 discontinuity) I have attached the pic in which the red data is the smoothed one. Blue is the original one. I multiplied each point with an increasing like 1, 1.1, 1.2, 1.3, 1.4...so on...

Hey everybody I've got a question for the programming savvy. I'm generating data which can generally be described by.. f(x,y) = Ʃn(an * xn)*Ʃn(bn * yn) Basically what I'm looking at is a data set which shows a surface which looks like about 1/4th of a wonky bowl. My trouble is...

It's been a while since I've done some C programming and I can't remember how I should go about implementing this. I have a chunk of memory allocated for storing an array of data. The allocation takes place while the main program is running. The data is being stored to the already allocated...

An algorithm for data compression? I am coming from a philosophy and science background and I'm particularly interested in finding out what a generalised data compression algorithm would look like. (By algorithm I mean something like a flowchart that would show how this process could be...

How to get an entry level job in the "Big Data" industry? I.e. developing algorithms and crunching numbers for Netflix, Twitter, etc.

Is there any material or book that explains how one could go from data to differential equation comprehensively? More like functional data analysis+differential equations

Universe as an Infant: Fatter Than Expected and Kind of Lumpy http://www.nytimes.com/2013/03/22/science/space/planck-satellite-shows-image-of-infant-universe.html?nl=todaysheadlines&emc=edit_th_20130322the universe may be 13.8 B years old [a bit older than thought] and expanding more slowly...

Just watching tweets come out of the conference, apparently there is a large scale anomaly that has come out of PLanck . One tweet says challenge to inflation, another says could be pre big bang physics. Obvioulsy I am just reading tweets, so not sure what's real yet. But this could be exciting...

I have the mean and I have the value at a percentile (99th percentile to be specific). I am just wondering if it's possible to find the SD. Actually, what I am trying to find is the value at the 90th percentile (I think I need the SD to do it, but maybe just maybe there's another method...)...

Hi Just got the data from a tensile strength test on a axle we did in school. Before it broke: http://i.imgur.com/1ddrZ7j.png The data : https://www.dropbox.com/s/xf5m8m8gyco561n/data.txt column 1: the displacement in mm column 2: the force in kNI'm supposed to plot a stress strain diagram...

Hi all i am a student doing my thesis on the aircraft performance. However, i am in a need of actual flight data to validate my work. The parameters i am looking at are the range, fuel usage, velocity and altitude. Does anyone know where can i access to those data of any flights or any types...

I want to find some force data for fluid stirring. originally I intended to record the data using my force sensor, but it doesn't have the resolution to read stirring force for Newtonian fluid. unless there's a Newtonian fluid with high enough viscosity to produce a reaction force greater...

I'm writing a program that models objects in our solar system in 3D with lots of functionality. (Senor Project in Computer Engineering), since a lot of time an effort has gone into this software so far, I'd like to implement the most accurate details to configure several objects. By objects...

I have seen many data structures like stacks, queue, binary search tree, avl tree etc. Except stack and queue do we actually use these data structure outside the field of computers? Suppose I want to store by books(or any other stuff) according to some priority I would not use a binary heap...

Hi, I am a Chemical Engineer but a novice in electrochemistry; hence the query might sound very basic to everyone. We have an industrial electrochemical process (With Iron anode) and we are conducting a lab experiment to understand what is the effect of electrolyte pH on corrosion rate of...

Because digital signaling uses an almost instantaneous transition from a set power level to 0W to represent the '1's and '0's of binary data, how does the computer determine when a file has stopped being copied to its storage device? Because even after the signal has stopped being transmitted...

I wish it wasn't out of desperation that I'm making this first post! I have a neural network that is making predictions, the next 5 time points per training. Back testing consists of appending these 5 point sets together to produce a data set that spans time over a much longer period...

I don't understand what this lab I'm supposed come up with will involve. There's going to be a sound generator producing sound waves. We will have a meter stick and a sensor to measure the sound intensity(W/square meters) and sound level(decibels). We will measure the intensity and level at 6...

Homework Statement The following data is hypothesized to possesses a normal distribution, is that hypothesis sustained by a Chi-square test at .05 significance: <66...4 67-68...24 68-70...35 70-72...15 72-74...8 >74...4 The Attempt at a Solution 1. I know that I should...

In case you didn't know already the first all sky Cmb map will be released at a press conference at ESA HQ March 21st http://smsc.cnes.fr/PLANCK/Fr/GP_actualites.htm This will be followed by a conference to discuss the cosmological data in Holland April 2nd-April 5th...

What does hardware based processing mean? ENIAC does hardware square rooting but what is the classification here? Is it like assembly code and C code difference?

I need the answer of the following question in 500 words. It was set in a university exam. But no where I found the straight forward answer. Please help Question: Differentiate between Parametric and non-parametric data. How these data are analysed? (Word limit 500)

Hi I have a problem with reading data in fortran 90. my programs try to read a txt file that only contains one number in it but if the txt file is empty it stops. i want to make it continue what should i do?

After conducting my experimental work I will have a number of sets of data. It is easy to use Mathematica to find a fit of just one set, but I would like to fit all sets at once as they are too many to do them all ate once. They will all be fitted by the same function say y=ax+b, every set...

With triangles, what is the least amount of data I need before I can start working out other data about the triangle such as angles and lengths of sides ect? I think it is at least 1 length and 2 angles or 2 lengths and 1 angle? What about triangles other than right angle triangles?

Hi everyone! I just discovered this new branch of statistics/informatics called "data mining", and I was wondering if anyone could suggest me a nice book about it, maybe some not too technical lecture? Otherwise any academic introductory book? What do you think about this subject? Thanks!

Dear Members, I would like to ask if we plot the Roll data of a satellite in degrees vs. the time, and if we take the area under the curve of this roll will give something meaningful? Looking forward for your reply. Regards,

Hi guys, So my project partner and I are struggling to solve a problem with our laser spectroscopy data for rubidium isotopes and I thought it may be a good idea to see if you could help us. If you take a look at the attached image you will see that the blue line shows our doppler free...

I am curious for the opinion of career statisticians on how marketable a Masters in Data Mining would be. I am currently a high school math teacher who has a degree in Economics. In college I had intended to pursue grad studies for statistics and have some SAS programming experience as well as...

suppose i want to transfer digital signals over 100 meter wire, the loic is implemented using two level, a +5 volts for 1 and 0 volts for logic 0. I want to transfer the data with speed 1000 Mbps which is 10^9 bits per second. now i consider the worst case scenario that my data consist of...

Is there a formal way to measure the error between some arbitrary points and a non-linear curve in order to minimize it?

Homework Statement For simplicity, I'm leaving out extraneous details (like actual numbers). Also, apologies for my formatting; I don't know how to use Latex, but I tried to make this as readable as possible. I have a set of N measurements for τ which each have their own standard deviations...

How can I extract time data from a system 2nd order ODEs in Mathematica?

Homework Statement Three people write programs. The following table shows the percentage of codes written by each person (A, B, C) and the percentage of buggy codes for each person. ****************Coder**************** *************A*B*C******************* Percent of code 30 25 45 Percent of...

I have prepared the coordinate of a pipe layout in excel. Now I have to input them into a FORTRAN code. Although I know it is possible to generate these coordinates inside FORTRAN, but working with Excel is much easier for me. Making these coordinate data inside FORTRAN is a very hard work and...

Hi, I'm having a lot of trouble finding a tutorial that would allow me to plot a set of data using octave. Everything seems to be teaching me how to plot functions. but say I have a list of data saved in a text file. How do I turn this into an xy scatter? Is this possible using octave? I...

Hi all, I am trying to figure out 1) What to call my problem so I can better research the literature, and 2) see if anyone here knows of a solution. Essentially, I have a large set of f(x) vs x points (~20,000) which I need to split into subdomains in x, and within each subdomain...

Hi Guys, Im doing my work placement at a steel processing facility and have been asked to derive a formula for quoting purposes that relates to radial bending on a press brake machine, The formula is needed to show the radial pressing increments on steel and the data they have given me is as...

Here is the question: Here is a link to the question: Help With A Statistics Problem! 10 Points!? - Yahoo! Answers I have posted a link there to this topic so that the OP may find my response.

See attached PDF for details: How do I calculate errors on the fit parameters, p?

Hey guys, I have a question of how to go about answering a question. I am trying to decide what coding/database language to learn next (most likely SQL with some access thrown in), but have an overall question. I am looking for an application or way to crunch daily statistical updates, then...

Hi all, I am trying to figure out the best way to transition into a new career. I obtained my undergraduate degree in mathematics in 2010. Up until the beginning of my senior year I was determined to go on to do a PhD in pure mathematics. However, I started second guessing myself when I...

Homework Statement The following table gives data, in KJ, for a system undergoing a power cycle consisting of four processes in series. Determine the a) missing table entries, each in KJ, and b) the thermal efficiency. I have attached an image of the Table. Homework Equations Q = (E2-E1) + W...

I have a table of 100 data points. I want to plot this on Matlab. Is there any other way for me to do this other than making an array for each column and then plotting it?