The math tag has no wiki summary.
0
votes
1answer
38 views
What hardware is most important for sparse matrix operations?
I do a lot of statistical computing in R, particularly text analysis which involves a lot of sparse matrix operations and EM algorithm calls. What hardware specs are most important for optimizing ...
0
votes
2answers
31 views
How to calculate a column of sums or test inequalities?
Given
34-2
34-5
34-3
I'm looking to obtain
34-2=28
34-5=29
34-3=31
Or, this would also be helpful:
given:
34-2=5
34-5<=34
34-3=31
I'm looking to obtain
! 34-2=5
34-5<=34
...
2
votes
1answer
48 views
Why is `bc` ignoring my `obase`?
>>> bc
bc 1.06
Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'.
ibase = 16
obase = 56
...
0
votes
0answers
24 views
What is the program that will generate equations from data points you give it? [closed]
I remember seeing a program that would do it, but I can't find it. Does anyone know of anything that does this?
0
votes
0answers
80 views
Is there a way to convert ASCII math into easily viewable text, e.g. to LaTeX?
I'm trying to find a way to format equations so they're easy to view, so LaTeX isn't a requirement, just an example.
I'd like it to leave alone the line breaks and to have a way of recognising ...
1
vote
2answers
111 views
Mindmap-Software with math support?
Is there any Mindmap-Software with Math Support?
I'd love a feature, that alows me to add some formulas to the nodes or edges.
I don't care which platform (Mac, Linux, Windows...)
It can be nonfree ...
-2
votes
1answer
52 views
How to get x/y of small graph? [closed]
We have two graphics, big and small, we know x/y of the big graphic.
How to get the coords x/y of a small graphic?
<?php
$graph1_x = 100;
$graph1_y = 50;
$coords_graph1_x = 30;
...
1
vote
2answers
146 views
Division with bc (bench calculator)
bc
1/2
0
5/3
1
10/3
3
When a fraction is entered into bc, the result is truncated to an integer. How can this behavior be avoided, such that the output of a division ...
0
votes
1answer
101 views
Best floating point solution for bash script?
I use bash calculator for floating point calculations and i have to use input redirection and backtick (`) symbol in scripts.
As normal bracket $[math operation] and expr doesn't support float ...
1
vote
4answers
108 views
How to extract two numbers from two strings and calculate the difference in Bash?
I have a text file which contains (among others) the following lines:
{chapter}{{1}Einleitung}{27}{chapter.1}
{chapter}{{2}Grundlagen}{35}{chapter.2}
How can I
get the 2 lines from this text ...
0
votes
3answers
508 views
Excel formula to convert per-annum interest rate to compounding daily and weekly rates
If I borrow $100,000 at an annual interest rate of 10%, then I would have been charged $10,000 at the end of one year.
However, I want the interest to be calculated daily and compound. If I simply ...
0
votes
0answers
61 views
Math and chemistry OCR [closed]
Possible Duplicate:
What is the best Math OCR app?
What OCR software can distinguish between the theta symbol, superscripts, subscripts, Greek letters, pi, radicals... chemical diagrams...
...
-4
votes
1answer
30 views
What is MatMate and MatMate-procedure? [closed]
So a guy writes to me a grate math related answer here. And uses frases like MatMate and MatMate-procedure. I wonder if MatMate is installable product and where to buy or download it?
0
votes
1answer
64 views
Which program to write on Math Classes? [closed]
Possible Duplicate:
Fastest way to type in math formulas out of the box?
I've recently started studying computer science,
and I was wondering, which program would you recommend
using while ...
0
votes
1answer
83 views
Unable to get Mathjax extension to work in Mediawiki
I am trying to install Mathjax on a mediawiki installation. From the official page for the extension, I followed all the steps.
Downloaded the latest zip distribution, uploaded and extracted it to ...
2
votes
3answers
128 views
Is there a program that can represent functions as sound?
I need a program that can represent functions as sound. Something like Mathematica's "play" which can generate a sound with the amplitude given as a function of time.
The program should support ...
0
votes
3answers
58 views
Theoretical Bandwith Capabilities
I'm always asked this by potential and actual clients: how many streams can I run simultaneously?
I always explain that it's maxServerUpstreamBandwidth / (streamDownstreamBandwidth * ...
7
votes
1answer
135 views
Why does the expression exp(i*pi) return the wrong result in GNU Octave?
I started to learn GNU Octave today, and tried the first expression given in the manual
exp(i*pi)
The result is
ans = -1.0000e+000 + 1.2246e-016i
And it seems GNU Scientific Library gives ...
0
votes
2answers
81 views
Excel: better ways to express this as a formula
x is an integer > 0
for x = 0, return 0; for all other x, return 1
solutions I have considered:
"IF(whatever)", obviously. Want to avoid it if possible, just cuz nested/lengthy formulas using them ...
1
vote
2answers
345 views
Converting bandwidth: Bps-Bytes/s MBit-MB
When buying network hardware the specs usualy contain "Bits". Software usualy uses "Bytes".
What are the formulas for converting bandwidth measures?
Examples (assuming perfect conditions, ignoring ...
1
vote
3answers
262 views
Program for solving mathematical equations
Do you know a program that can solve equatation by given variable? And where I can tell the program which variables are parameters?
1
vote
1answer
62 views
Is there a natural math translator for matlab?
I was wondering if someone has used a tool that can write math in a natural way, like in math type or LyX and then translate it to Matlab syntax for easy function entering
Thank you
PS I know it can ...
3
votes
1answer
28 views
looking for a calculator that accepts Data Maps and scientific notation
I need a calculator or program that I define a mathematical formula for it like
Answer = Variable1+Variable2 and specify that Variable1 has max 5 digits and two decimal places...variable2 accepts ...
0
votes
1answer
144 views
Perform a math operation on all numbers in a file
I have a list of pixel values in a file, and need each to be half its current value. The pattern for the value is always 123px where 123 varies drastically.
How can I half each pixel value?
I'm ...
0
votes
1answer
150 views
How do I calculate how long a packet will reach its destination?
I am stuck with this homework question. I honestly have no clue what it is talking about. I been absent from class due to some personal reasons.
The question asked: You are transmitting 100 bit ...
6
votes
1answer
340 views
How can I generate Pi to a given number of decimal places from a script?
Does anybody have a script that I could easily run like:
sh generatepi.sh 10000
where 10000 is the number of generated π (Pi) decimal places.
0
votes
0answers
326 views
Any good programs for writing math homework on my Mac? [closed]
I'm taking a statistics class currently. I don't have great handwriting and I often have to erase / re-do things which I've already written and we can submit a printed version instead. Is there any ...
4
votes
2answers
1k views
Use a Trendline Formula to Get Values for Any Given X with Excel
Is there an easy way to apply the trend line formula from a chart to any given X value in Excel?
For example, I want to get the Y value for a given X = $2,006.00. I've already taken the formula and ...
1
vote
2answers
45 views
How much disk space would take to list every possible UEI-48 or MAC address?
Is it (2^48) possible addresses X 48 bits = 1536 terabytes ??
0
votes
1answer
80 views
Does Euler include Maxima?
Referring to the two math softwares, I want to know if Euler includes Maxima inside it. So, if I download and install the Windows version of Euler, will I be installing Maxima as well?
So, which one ...
0
votes
1answer
130 views
How Do You Solve A Math Fraction Question [closed]
How do solve this math fraction 2 3/4 + 4 5/6 + 1 3/8
1
vote
0answers
109 views
Who uses R with multicore, SNOW or CUDA package? [closed]
Does anyone use R (http://www.r-project.org/) with the multicore, SNOW or CUDA packages, so for advanced calculations that need more power than a workstation CPU? On which hardware do you compute ...
4
votes
7answers
2k views
Best program to write Math and draw graphics? [closed]
Possible Duplicates:
Software to write and manipulate mathematical equations
Math draws software, like basic geometry
Hello,
Could you please tell me what's the best program to write ...
5
votes
3answers
491 views
Windows Calculator Showing Strange Output
Try this on Windows
Steps:
Open Calculator directly or by typing calc in RUN.
Then type 4 and take square root "sqrt"
And whatever you get(ideally you will get 2!), substract 2 from it.
Now My ...
1
vote
2answers
649 views
3D plotting in Ubuntu
I have Ubuntu 10.10 installed and need to plot 3D graphic.
I have installed several free applications available in the repository, like QtiPlot and GNU Octave. I have found out and created the ...
2
votes
1answer
1k views
Differences between MathType and Equation Editor format in Microsoft Word?
I've been using MathType Equation Editor to create Equations in Word. They key feature I have been using is the one where you type TeX equation and render it as an equation object. This generates ...
5
votes
4answers
620 views
Any text editor that can apply some math to replacement text?
I have big XML file
<obj param="2542">
<obj param="2333">
<obj param="6433">
I need to increase all "param" values by some number. I can match numbers that I need with regexp ...
1
vote
1answer
128 views
How to use jsMath in your emails?
Is it possible to use jsMath to write emails?? If so can anyone tell how can I do that? I need to write to my Prof. an email that needs mathematical expressions. Any clue??
Thanks
Update:
Here is ...
0
votes
3answers
2k views
Data Transfer Speed in 1 GBPS LAN connection
I want to know about the method in which we can calculate of data transfer speed. If i am sending 1 GB data through 1 Gbps LAN connection from one computer to another how much time will it take to ...
0
votes
4answers
94 views
excel formula conversion question
This may be a little basic math question : But does anyone know how to convert this number:
6.31E+06 ???
This is in excel. when i click on it i get this value :6311730
Please help and I apologize for ...
0
votes
0answers
264 views
How to set some constraints to variables in Wolfram Alpha? [closed]
For example, I have function f(x) = x where x in [0; ∞), and I want to find out the minimum of that function.
I can ask min(f(x) = x), but I don't know how to tell it x restrictions.
3
votes
5answers
141 views
Open Source Computer Algebra System
I'm looking for Free and Open Source Computer Algebra Systems (FOSS CAS) for the day-to-day use of a computer science student (--> it doesn't need to be as fast and precise as mathematica).
It would ...
0
votes
1answer
323 views
Grapher - For windows
We've got Grapher which is only for mac.
Do we have something similar for Windows?
1
vote
4answers
552 views
Keyboard layout for mathematical/Greek symbols
I've been wondering about this for a long time but never thought to ask: I do a lot of scientific work so there are many times it would be really handy to be able to type mathematical symbols or Greek ...
0
votes
3answers
2k views
Equations saved from Word 2007 for Windows do not appear in Word 2008 for Mac
I am a math teacher who uses Word 2008 on the Mac, and I need to collaborate with other teachers who are using Word 2007 under Windows. When they send me a document with mathematical equations in it, ...
3
votes
4answers
515 views
Fourier transform software
After spending a lot of time searching for this, I thought that some SuperUser gurus might know the answer. I'm searching for an open source application to compute an FFT, that could:
Import a ...
3
votes
1answer
483 views
Underbraces in Word math zones and dealing with stretchy parentheses
Parentheses in Word usually stretch with whatever they're containing. This might be un-noticeable for things like
but for stuff like
it's definitely nice, especially compared to the fact that ...
0
votes
1answer
1k views
Prove this Tautology (No Truth Tables) [closed]
This is for homework for my Discrete Math class.
I understand how to prove tautologies with a truth table.
I'm having trouble figuring out how to do it without though.
I found this example in our ...
12
votes
9answers
7k views
Best software for taking math notes at lectures
Let me first just say that I know about La-Tex, and that doesn't fast enough. I use it for papers, but for "real-time" note taking it's just to heavy. I'm talking two math classes this semester. ...
1
vote
2answers
460 views
How do I turn 5.000000E-01 into a 'human readable' value?
Title says it all ? What's that 00000000E thing all about ?
