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Questions tagged [equations]

194 questions
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how to calculate plane equation using three points and two vectors?

I am trying to calculate two plane equations from the data of two dicom images and get an intersection line from these two plane equations. The dicom tag ImagePositionPatient has three coordinates x,y,z and the tag ImageOrientationPatient has two…
NS.
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Matlab: Estimating coefficients of nonlinear differential equations

Need to solve the system of nonlinear differential equations: x1p = a1*u2*x1^1.3 + a2*u1 + a3*u3 x2p = (a4*u2 + a5)*x1^1.3 + a6*x2 x3p = (a7*u3 + (a8*u2-a9)*x1)/a10 x1p, x2p & x3p are time derivatives of x1, x2 & x3, i.e. dx1/dt, dx2/dt &…
Rok Petric
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How to insert Equations(mathematical) generated from Excel into mysql database?

I have a set of equations generated using Microsoft Excel which needs to be inserted into MySQL database. Is there a way to do it ? For Example : I wanted to insert the following equation into MySQL database. This was generated using Microsoft…
TechFriend
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Basic Julia Set

I know how to generate a basic Mandelbrot fractal based on the system Z -> Z + C, which breaks down to: X -> X² - Y² + A Y -> 2XY + B Is there a basic definition for a Julia set though on the same simple level, or at least a relatively simple level?
HugMyster
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JFreeChart plot a natural logarithm and e

I am using JFreeChart to plot some equations like: x - x^2 I am using this code: (slightly modified by the example provided) double[] a = {0.0, 1.0, -1.0}; // By the model: y = a0 + a1 * x + a2 * x^2 + ... + an * x^n Function2D p = new…
Grigore Dodon
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How make a equation in OpenOffice

How to make a system of equation in OpenOffice? f(%ksi) = left lbrace stack #(2 (x-a)) over ((b-a)(c-a))# #(2(b-x)) over ((b-a)(b-c)# right none It doesn't not work.
elle
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Create a 2D array that is the product of two functions

I am working on a visualization and trying to create a 2D array that is the product of a normalized Gaussian function on the X axis and a normalized exponential function on the Y axis (using Python).
Zachary Russell Heineman
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DRAW (print - not the graph) an equation in Quartz (iPhone SDK)

I'm trying to draw equations to the screen. Not the graphs or sth just the equation, but in a "pretty" way (f.e. like they look on wikipedia ). I've done some research but could find a "build-in-way", but maybe i overlooked something?!? So i've…
Tobi
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Copy Microsoft Word text and equations as mathml and text together

I have text with equations in Microsoft Word 2013. I want to copy this text with equations together, but what I need is, text as plain text and equations as mathml. When I copy mathml only Equation Options -> Copy MathML to clipboard as plain text…
Michael Samteladze
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Java: Turn a math equation into a String expression?

I'm new to Java and I'm trying to figure out how I would write a math expression that displays the values of the variables on one line, then on the next line does the math? Here is what I thought would work, but it just prints out the answers…
Richard Newman
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Is it possible to get explicit solution to the following equation in Matlab?

Note, the question is edited. I set the restrictions as suggested and received the following outcome: syms f1 f2 M b1 b2 assume (M > 1 & b1 > 0 & b2 > 0) S = solve ( [(f1^M)/(f2^M) - M/(b1*f1) + M + 1 == 0, ... (f2^M)/(f1^M) - M/(b2*f2) + M + 1 ==…
Beck
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How can I solve equations with F#?

How can I solve equations with F#? For example (just a loose syntax I made up): define a, b where (a + b = 5) and (a - b = 1) define c where (c = c / 2) print a, b, c I want it to output 3, 2 and 0. Also, can it do things like define d where d =…
Florin Toader
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Why is my grapher printing multiple instances of the function? C++

I have this program that graphs simple parametric equations on a board of a defined length and width by me. It compiles fine but prints multiple instances of the function in different positions of the graph. If someone could please help me figure…
Cheeseman
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Solve Systems of Linear Equations in MATLAB

I have the following Equations T2+T4-3.615*T1=0; T1+10+2*T5-5.752*T2=0; T1+38+2*T5-4*T4=0; 83+T4+T2+10-4*T5=0; i've tried the following to find the values of T1,T2,T4,T5 syms T1 T3 T4 T2 T5…
Mohamed Maher
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Find a vector components value in matlab

I have thw following problem Considering the matrix M = [1 2 3; 4 5 6; 7 8 10] And the vector E = [Ex; Ey; Ez] And B = [1; 4; 10] Does anyone knows how to find the values of E components in matlab, considering M*E=B?
Mac
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